 Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
The other day I pulled the plug on the TPS but due to rain was not able to test the results until today. I rode for about 100k up and over a pass (so different elevation and bike had to pull hard) and it was hot in the valley and cool at the summit. Pretty good test I'd say. And the Verdict? Pull the plug (disclaimer... I am not a mechanic).
Without TPS:
- the bike idled a little faster... no big deal, just adjust accordingly.
- performance was equal to before (or did it run even better...hmmm?).
- No decel pop-di-dee-pop-pop. At all! Gone. Denada. Finito!! I like that.
Thanks to all who turned me on to this simple modification.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2009
Posts: 198
Adjunct
|
|
Adjunct
Joined: Jan 2009
Posts: 198 |
+1 on pulling the plug Mountainman. My bike seems alot happier and the rev limit is more predictable. Wish I would have tried that sooner. Can anyone explain what is actually happening to cause the change?
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2009
Posts: 198
Adjunct
|
|
Adjunct
Joined: Jan 2009
Posts: 198 |
Never mind just read the other thread
|
|
|
Re: Disconnect TPS
|
Joined: Apr 2007
Posts: 3,059 Likes: 8
Loquacious
|
|
Loquacious
Joined: Apr 2007
Posts: 3,059 Likes: 8 |
Mines been disconnected since last year and haven't really had any desire to plug it back in. It's nice to be able to downshift from high speed and listen to the engine decel all the way down through several gears as I come to a light with no poppaty pop pop.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
I'm disconnecting mine this weekend. Pulled out on a highway on my way home from work last night and had to jump into the fast lane and crank it hard due to an oil slick all over the slow lane... that was interesting..! Anyway, I hit the limiter in 2nd and the bike just went to sleep for what seemed like 10-15 seconds. Not a happy experience since I was going uphill at the time with traffic climbing up my ******. I was able to drift over to the slow lane beyond the greasy stretch and it finally came to life again.
Don't wanna play that game again any time soon.
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: Oct 2007
Posts: 1,680
Learned Hand
|
|
Learned Hand
Joined: Oct 2007
Posts: 1,680 |
I am planning to disconnect mine this weekend as well. I had a similar experience on the highway. Outright dangerous is what it is when you are suddenly without any power and have to drift to the side, in traffic.
Thom
I might be wrong, I sometimes am.
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
personally, I don't think that will prevent it from cutting out like that, I think it has more to do with the ignitor.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
It's done that to me before - only when I hit the rev limiter. I rarely hit the limiter in normal riding, so it hasn't been that big of a problem. I'm going to disconnect it on Sunday and see if it makes a difference.
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
I'm disconnecting mine this weekend. Pulled out on a highway on my way home from work last night and had to jump into the fast lane and crank it hard due to an oil slick all over the slow lane... that was interesting..! Anyway, I hit the limiter in 2nd and the bike just went to sleep for what seemed like 10-15 seconds. Not a happy experience since I was going uphill at the time with traffic climbing up my ******. I was able to drift over to the slow lane beyond the greasy stretch and it finally came to life again.
Don't wanna play that game again any time soon.
WTseriouslyF???? Triumph should be notified on this one. This is a serious safely issue! I mean, your bike just cuts the *^*& out!? Huh?!?!?
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
My bike's an 03' America with 30k+ miles on it. I think it's a question of something being worn out in the TPS, not a major factory safety issue. Like I mentioned, in normal riding I never hit the limiter. Even in the situation I described above, I didn't have to hit it, I just got on it more than usual....
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Small update on TPS disconnection. The pipes are quieter... huh? And I swear she has more power. One other thing...maybe the throttle is a little touchier.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
|
|
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
It's just a mechanical potentiometer that most likely is slightly out of adjustment. With the idle screw far enough out for the butterfly to close completely this is what your meter should see:
TPS readings from a showroom bike are:
Blue & Yellow wires = 4.42K OHMS (4.40-4.44) closed throttle &
1.38K OHMS (1.36-1.40) wide open throttle.
Black & Yellow wires = 0.81k OHMS (0.79-0.83) closed throttle &
3.96k OHMS (3.94-3.98) wide open throttle.
It would be easy enough to see if your TPS is out of kilter if you have your meter handy.
On the other hand lots of cats are running after-market carbs with no ill effects so if you don't want the timing advance electronically manipulated go ahead and unplug the bugger, it won't hurt anything.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
On the other hand lots of cats are running after-market carbs with no ill effects so if you don't want the timing advance electronically manipulated go ahead and unplug the bugger, it won't hurt anything.
Thanks for that bit of reassurance Ed... I've loved my bike even more after pulling the plug.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
|
|
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
The mapping on our bikes (if I understand the maps http://www.bonnevilleamerica.com/forums/...part=1&vc=1 ), both 790 and 865 is designed to retard the ignition at higher revs. You could do an easy test just to satisfy yourself by climbing a hill at lower revs (just barely above lugging the engine) and listening for pinging (detonation). A subject for Greybeard to weigh in on for sure as he has a much higher developed understanding of all things cam and timing related.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
I am curious about this.. do you remove it from the carbs or leave it attached and just unplug the 3 wire connector?
TrOjAn
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS
|
Joined: Jun 2007
Posts: 170
Adjunct
|
|
Adjunct
Joined: Jun 2007
Posts: 170 |
Today is Thank a Soldier Day. Please celebrate all day long.
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2007
Posts: 23,179 Likes: 55
Fe Butt
|
Fe Butt
Joined: Feb 2007
Posts: 23,179 Likes: 55 |
Quote:
What is the TPS?
Throttle Position Sensor
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
Thanks for asking that, it kept me from showing my ignorance! So what's wrong w/the TPS and why do we want to unplug it? Could this have anything to do w/ the backfire syndrome that gets blamed for blowing out the starter idler gear?
Hot Pipes
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
I am curious about this.. do you remove it from the carbs or leave it attached and just unplug the 3 wire connector?
Still attached to the carbs but just unplugged the connector. It is in a tough spot to get at which is behind and between the carbs but eventually I got it.
Quote:
Could this have anything to do w/ the backfire syndrome that gets blamed for blowing out the starter idler gear?
Nope James, my bike still backfires (occasionally) as usual upon startup. The reason I disconnected it was based on experience from others in this forum. Believe me when I tell you it was not from any technical know how on my part so I can't provide any actual knowledge. But I can tell you for sure my bike is a better deal for doing it. I tell you this after putting about 4000 km after pulling the plug.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
Well, I still haven't pulled the plug yet... was going to do it several times, but either I'm too busy with other stuff or it finally quits raining and I can ride...
Anyway, I'd like to jabber on this topic a bit.
I had a 67 Bonneville, twin Amal carbs, no electronics. It ran the same every day, rain or shine, hot or cold outside. No electronic gizmos to tell it how to run. If it didn't run the same, you knew you had a problem.
With my 03 America, there are days when it runs "odd". Not bad, but not "right". A seat of the pants thing. If I stop for any reason, gas, cigarette, etc., shut it down and then start it again, it will run like I think it should. Stronger. The exhaust sounds deeper. This has been since it was new. I even posted this on here years ago and others noticed the same thing. We chalked it up to weather, engine temperature, altzheimer's, etc..
I'm now wondering if the TPS and the ignitor don't always see eye to eye as it were. I have no idea. Just typing out loud.
If the warden ever releases me from honey-do ******, I'll finally disconnect the thing and see if it makes the difference.
Now, back to our regularly scheduled programming....
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
|
|
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
You have a good point. The company has based the entire sum of their high end ignition programming on the foibles of an analog pot that's actuated by the butterfly rod on the right carb and held in place by one torx screw. Make me wonder why they didn't use an internal feed off the same lead that runs the tach instead...I mean, isn't it meant to modify the timing according to the rpm of the motor?
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
|
|
|
Re: Disconnect TPS
|
Joined: Sep 2006
Posts: 1,457
Learned Hand
|
|
Learned Hand
Joined: Sep 2006
Posts: 1,457 |
Quote:
...I mean, isn't it meant to modify the timing according to the rpm of the motor?
Yes, but it also modifies the timing by calculating engine load with throttle position thrown in the mix. I'm thinking its changing timing without regard to real load. A 140 lb guy with no bags or anything would have the same program as someone two up loaded down. Maybe an old style vacuum advance would be better.
|
|
|
Re: Disconnect TPS
|
Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
|
|
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
Quote:
Yes, but it also modifies the timing by calculating engine load with throttle position thrown in the mix.
I'm thinking that with 5 maps for the throttle position that the incremental change in timing just isn't drastic enough to rely on that pot when the ignitor already supplies exact rpm info (relative to itself and the accuracy of that metric is subject to the whims of Gill).
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2009
Posts: 94
Member
|
|
Member
Joined: Jul 2009
Posts: 94 |
well guys, gotta thank ya all. just unplugged the TPS at the suggestions here and i gotta say im impressed. pulls a little harder, better throttle response, it seems.. less vibration, no pop on decel. dont think ill be goin back.
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
I've said this before... I ran mine on the dyno with the TPS hooked up and then immediately ran it again with the TPS disconnected and the machine showed absolutely no noticeable difference as far as horsepower or torque anywhere from idle to redline. When overlaid, the power lines were nearly identical.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2009
Posts: 73
Member
|
|
Member
Joined: Jul 2009
Posts: 73 |
Quote:
I've said this before... I ran mine on the dyno with the TPS hooked up and then immediately ran it again with the TPS disconnected and the machine showed absolutely no noticeable difference as far as horsepower or torque anywhere from idle to redline. When overlaid, the power lines were nearly identical.
If that is the case, it sounds to me like it dose not do anything. I think I will disconnect mine now
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Oh yeah Dave, I forgot about the dyno test you did. Anyway... now approaching 6000 km with the thing unplugged and loving every minute of it. The bike just seems 'better.' As stated before I think it pulls harder and no there's no pop-did-dee-pop-pop.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2009
Posts: 94
Member
|
|
Member
Joined: Jul 2009
Posts: 94 |
keep in mind, i didnt say i gained anything... i cant afford dyno runs; heck, i dont even have a speedo hooked up, so i cant even compare mph/rpm at this point. im simply saying she feels as tho she pulls harder (aka acceleration, which is not a function of horsepower or even entirely torque, but where she is in the powerband). that said, if the plug does nothin, its a perfect candidate for the wiring harness in the sky... now for that sidestand switch...
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
I know you didn't, I just want to be clear to anyone considering this that it's no magical power enhancement. As far as "feel" goes, I can't say one way or another, I never rode mine with it disconnected. But, if your looking to eliminate deceleration pop, this seems to be the way to do it!
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2009
Posts: 71
Member
|
|
Member
Joined: Aug 2009
Posts: 71 |
Sounds to me like the igniter is evaluating the two signals of throttle angle and rpm to improve
driveabilty performance. Standard MO for modern day ignition systems.
Seeing as a dyno run is a test of WOT (wide open throttle) only, all bets are off as far as
driveabilty. Plugged or unplugged, at WOT the ignition is going to go for it's full advance.
A more accurate test for the plugged/unplugged option would be a half throttle dyno run. Mark
a spot on the throttle grip to twist the grip to. Nobody ever tunes the lower throttle
position circuits on a dyno. Just the main jet circuit.
"When possible, make a legal u-turn."
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2006
Posts: 3,099
Loquacious
|
|
Loquacious
Joined: Feb 2006
Posts: 3,099 |
Hey Scott,
I don't understand how a dyno run is a test of wot only.
When we ran 6 bikes at the NH Rally a couple of years ago,
the charts showed from idle to wot with curves for hp and
tourqe, as well as an a/f curve. Am I missing something?
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2009
Posts: 71
Member
|
|
Member
Joined: Aug 2009
Posts: 71 |
Your dyno run is a measure of torque and horsepower through the rpm range at WOT.
The throttle is twisted fairly quickly to WOT and the motor rolls up to redline.
The term idle in that sense is referring to the rpm it started at.
Not necessarily the throttle position.
Nobody dyno tunes for peak power at say, 1/4 throttle or 1/2 throttle which
would allow you to tune the pilot and needle. Those are the circuits most used
and where your driveabilty is.
Last edited by Scottdog; 08/13/2009 3:24 PM.
"When possible, make a legal u-turn."
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Quote:
Nobody dyno tunes for peak power at say, 1/4 throttle or 1/2 throttle which
would allow you to tune the pilot and needle. Those are the circuits most used
and where your driveabilty is.
My dyno guy does, and I know exactly what my air/fuel mix is at cruising speed/rpm.
Quote:
Your dyno run is a measure of torque and horsepower through the rpm range at WOT.
The throttle is twisted fairly quickly to WOT and the motor rolls up to redline.
The term idle in that sense is referring to the rpm it started at.
Not necessarily the throttle position.
Isn't the default setting for an unplugged TPS to WOT anyway? So how would a dyno not show it on a WOT pull?
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 117
Adjunct
|
|
Adjunct
Joined: Mar 2009
Posts: 117 |
i kinda caught some of this as sailed by way over my head and was pleased when someone asked what the TPS was and had it explained but in idiot terms is that the black connection on side of carbs ?
Tone
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 117
Adjunct
|
|
Adjunct
Joined: Mar 2009
Posts: 117 |
many thanks i think i give it a go. at last a change i can afford to do on my bike 
Tone
|
|
|
Re: Disconnect TPS
|
Joined: Apr 2007
Posts: 3,059 Likes: 8
Loquacious
|
|
Loquacious
Joined: Apr 2007
Posts: 3,059 Likes: 8 |
Quote:
i kinda caught some of this as sailed by way over my head and was pleased when someone asked what the TPS was and had it explained but in idiot terms is that the black connection on side of carbs ?
Hey Anthony. No such thing as idiot terms or idiotic questions. Don't hesitate to ask in the future. The gang here appreciates being able to help even if the question appears to be simple. It's how we all learned. 
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2009
Posts: 71
Member
|
|
Member
Joined: Aug 2009
Posts: 71 |
Quote:
Quote:
Nobody dyno tunes for peak power at say, 1/4 throttle or 1/2 throttle which
would allow you to tune the pilot and needle. Those are the circuits most used
and where your driveabilty is.
My dyno guy does, and I know exactly what my air/fuel mix is at cruising speed/rpm.
This is good. Sounds like he is using his dyno the way you're supposed to.
Most guys, especially the Dyno Doctors at the rallys, just tune the main and
produce numbers to brag about amungst your friends.
Quote:
Quote:
Your dyno run is a measure of torque and horsepower through the rpm range at WOT.
The throttle is twisted fairly quickly to WOT and the motor rolls up to redline.
The term idle in that sense is referring to the rpm it started at.
Not necessarily the throttle position.
Isn't the default setting for an unplugged TPS to WOT anyway? So how would a dyno not show it on a WOT pull?
I don't understand your question here. 
"When possible, make a legal u-turn."
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
I didn't really understand it either... 
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 117
Adjunct
|
|
Adjunct
Joined: Mar 2009
Posts: 117 |
well it maybe just my imagination but i unplugged mine today and only did a 12 mile run back home but bike seemed smoother might be in my head because having unplugged i expect a difference, but when i am at low revs in almost anygear and then accelerate it is normally a bit lumpy almost as tho i am in wrong gear but i didnt get it once comeing home and i was trying just seemed a far smoother ride
Tone
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Last edited by piper; 08/15/2009 6:27 AM.
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
|
|
Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Scottdog is correct, default dynoruns are basically WOT, especially with CV carbs, unless the dyno operator specifically tests for other combinations/conditions (say, a/f @ cruise or idle). It therefore should come as no surprise that back to back dyno runs on the same machine in the same conditions would show similar results with & without TPS connected.
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2009
Posts: 73
Member
|
|
Member
Joined: Jul 2009
Posts: 73 |
I disconnested my this weekend, see no reason to ever hook it back up. Now what else can I rip out of the wireing on this thing 
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Found this regarding popping on "the other site" written by Pieman. Can't say I fully understand everything, but surely someone does? Quote:
Our Bonnies with the carbs setup correctly and with anything other than the restrictive OEM silencers will tend to snap, crackle and pop on the overrun to varying degrees, mainly between 3,000rpm and 2,000rpm. The AFR in this rev region starts at around 17.5:1, goes down to 14.5:1 and then by 2,000rpm is back up to 16.5:1
If you want to reduce the overrun snap, crackle and pop to virtually nothing, set your pilot screws to the correct setting and then remove the ACV spring from the left side of the left carb and cut off exactly three turns. Put it back together with the cut end away from the rubber diaphragm and go for a ride, no more snap crackle and pop.
This mod doesn't effect the carb setup in any other way than by reducing overrun noise. Enjoy.
Sounds interesting (I think), but I do need an explanation...
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 122
Adjunct
|
|
Adjunct
Joined: Jan 2005
Posts: 122 |
Here is a link to a source that seams to shed some light on the ACV function - www.thumperfaq.com/acv.htmHasse Even better is this link to the Keihin CVK mysteries where 'ACV' is named 'Coasting Enricher' - www.gadgetjq.com/keihin_carb.htmSecond edit: This issue with the 'ACV' is also discussed in the BA thread 'I really need help on this one!! Carb issue?'!
Last edited by Hasse; 08/18/2009 8:35 AM.
|
|
|
Air Cut Valve Spring
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Thanks! OK, so now I'm a little smarter and really think I understand it. However, cutting a spring is quite err... definite. Could be hard to find a new one if needed. It sounds great though, to be able to fatten up the mixture when decelerating and only then. Would make reconnecting the TPS possible and still get rid of the pop and crackle... 
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: Air Cut Valve Spring
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
i just happened to come across this TPS eliminator kit figured I'd post it
http://www.shop.lcfabrications.com/product.sc?productId=19&categoryId=4
Ahhh yes, for all us TPS-be-gone folk that would clean up the right carb nicely.
Live to love, love to live.
|
|
|
Re: Air Cut Valve Spring
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
Quote:
However, cutting a spring is quite err... definite. Could be hard to find a new one if needed.
Hi, After spending 3 weeks messing with carbs and mainly the Air Cut Off Valve I feel somewhat enlightened on it.
This is ONLY my opinion and I dont mean to tread on peoples toes but:::: cutting the spring is NOT the way to go.
The design on the air valve is rather clever... should you take it apart you will see at the rear of the diaphragm is a small piston shaped rod, under normal running, tickover, cruising and accelerating the spring holds the piston to the back of a recess allowing unrestricted air into the carbs via a small drilling.
Once the throttle is closed there is a vacum in the air valve and the small piston is sucked towards the outside of the recess closing the 2 air holes making the mixture richer.
If you were to cut that spring lessening the tension the vacum would actually pull the piston out covering the holes at idle and richen the mixture considerably, on over run (high vacum) the piston would be pulled PAST the holes so defeating the object. The spring is a designed length to allow the movement to work but it also acts as a stopper when fully compressed to stop the piston moving out the opening too far.
To disable the valve is a simple matter of undoing the 2 screws and place a small bit of a plastic bag OVER the O ring to stop the vacum. Cheap and reversable.
Hope that might help someone.. I spent ages playing with it, springs, tape, vacum gauges so I have a very good understanding of how it works.
TrOjAn
|
|
|
Re: Air Cut Valve Spring
|
Joined: Jan 2005
Posts: 157
Adjunct
|
|
Adjunct
Joined: Jan 2005
Posts: 157 |
Will disconnecting the TPS cause any damage?
|
|
|
Re: Air Cut Valve Spring
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
Hope not.
I finally unplugged mine, or should say had my son do it. I couldn't begin to get enough fingers in place to pull the plug apart...
Went for a short ride today and the throttle response feels better and the engine feels smoother. Didin't check the popping thing, but I had that pretty well dialed out already.
More flags
More fun!
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
OK...so I disconnected my TPS a few days ago to see what all the hoopla was about. Here is my experience.... BEFORE: Freak (K&N pods for those that want to split hairs), Specialty Spares long cannons, 150 main, 45 pilot, dont remember the turns out. The bike ran just fine. No issues at all. Smooth throttle response off the line. Plenty of power for what it is. No major popping on decel, rather a nice low burble as the rpms came down No backfires etc... So why did I do it you ask...cause theres always something else to try to make things better and so many people liked what it did for them. Oh...and I love to tinker  AFTER: No change in setup other than re-connecting the TPS. Off the line throttle response was bad. The bike wanted to die first before it would take off. I noticed a backfire usually in situations where the RPMs were high (over 4000) and I needed to pull the clutch for a quick stop. Not a loud backfire but I could hear and feel it. Didnt notice a change in popping on decel. Didnt notice any increase or decrease in power. Oh well...I guess I can not report positive results with this one. I guess my bike is just set up right 
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Kinda interesting... like everything there is no said and fast rule. Too many variables and life's too short to figure it all out. But I'd love to 1/4 mile against you and yours just to introduce another variable. Nah.... just kidding. Just that since I disconnected the TPS on mine is seems to go like snot compared to before. Could be my imagination... but no ill effect for sure. Go figure, eh?
Live to love, love to live.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Keith...Ill drag with ya...as soon as you make it down here  I thought it was interesting that I didnt get a positive result but like you said, variables and lots of em.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
Don't tell PETA, but I thought I'd give this horse a few more kicks....
After disconnecting the TPS and getting a few good miles in, I have this to report:
The bike runs smoother. The throttle is more responsive. My gas mileage hasn't changed - still average about 45 per. And, the most impressive result, when I hit the limiter, it no longer dies for several seconds - it just burbles a bit to let me know it's time to shift or back off.
The only downside so far - I work nights - leaving at midnight - and I used to have to pull the choke out 1/4 to 1/2 to start the bike. Now (and it's been in the high 40's low 50's) I have to pull the choke out all the way or it doesn't want to start. Once started, I push the choke in about 1/2 and give it a minute or two, and it runs fine.
For those who hyper-analyze these things:
03 America 790cc.
Thunderbike silencers.
45 pilots, 130 mains. Slides drilled to 7/32.
Stock airbox with snorkels removed, K&N filter, with screened bellmouth fitted.
Vacuum balancer hose fitted between intake manifolds.
Knurled thumbscrew pilot screws set at 3 1/2 turns.
Nology coils and high performance wires.
89 octane gasoline.
It seems to work well for me.
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Great! I don't think I'll go back. 
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2008
Posts: 1,169 Likes: 14
Learned Hand
|
|
Learned Hand
Joined: Jan 2008
Posts: 1,169 Likes: 14 |
Quote:
Slides drilled to 7/32.
It seems to work well for me.
did you really drill your slides out to 7/32? that is .219 inch. It works okay?
the usual drill out is to .118 inch. approx 3MM up form the 2.5 mm stock.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
I'm pretty sure 7/32" is what I did to mine as well
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 122
Adjunct
|
|
Adjunct
Joined: Jan 2005
Posts: 122 |
I think my drill bit was 7/64.......
Hasse TBA -02 Pre-Fire Cardinal Red, Wiseco 904, Thunderbike pipes, Freak
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 1,382
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,382 |
Yep. 7/64 " Here's the link Click Here
Tony G
'03 America
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
that's right, it's been years since I did it, hard to remember small details like that
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 1,382
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,382 |
Quote:
that's right, it's been years since I did it, hard to remember small details like that
Dave, they say that the first thing to go is your memory.
I can't remember the second thing.
Tony G
'03 America
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2008
Posts: 1,169 Likes: 14
Learned Hand
|
|
Learned Hand
Joined: Jan 2008
Posts: 1,169 Likes: 14 |
7/64 = .109 inch, that sounds way more likely. and you could still go bigger yet. I have mine at .120 inch.
back to the original topic - My TPS is off the carb and unplugged from the harness. It seems to idle better than it did before, especially when cold. No down side to removing it that I can see (so far).
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
It was 7/something... and it was a loong time ago. What's a few .000's among friends??
Sorry.
More flags
More fun!
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Quote:
Quote:
that's right, it's been years since I did it, hard to remember small details like that
Dave, they say that the first thing to go is your memory.
I can't remember the second thing.
then I'm in bad shape, because I'm only 31
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
Im due a dyno run soon... should I do it with the TPS connected or disconnected?
Decisions decisions
TrOjAn
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2008
Posts: 1,048
Learned Hand
|
|
Learned Hand
Joined: Aug 2008
Posts: 1,048 |
Quote:
Im due a dyno run soon... should I do it with the TPS connected or disconnected?
Decisions decisions
yes you should. 
01010100 01110010 01101001 01110101 01101101 01110000 01101000 <3
|
|
|
Re: Disconnect TPS
|
Joined: Jan 2008
Posts: 1,169 Likes: 14
Learned Hand
|
|
Learned Hand
Joined: Jan 2008
Posts: 1,169 Likes: 14 |
Quote:
Im due a dyno run soon... should I do it with the TPS connected or disconnected?
Decisions decisions
do one of each. it only takes a minute or so to unplug the TPS. Then you will have a straight up answer. Just tell the dyno guy what you want to do before he starts.
should be interesting.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
Quote:
Im due a dyno run soon... should I do it with the TPS connected or disconnected?
Decisions decisions
do one of each. it only takes a minute or so to unplug the TPS. Then you will have a straight up answer. Just tell the dyno guy what you want to do before he starts.
should be interesting.
Took me a lot longer than a minute to unplug that puppy. It's a hard place to get yer hand into.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Quote:
Quote:
Quote:
Im due a dyno run soon... should I do it with the TPS connected or disconnected?
Decisions decisions
do one of each. it only takes a minute or so to unplug the TPS. Then you will have a straight up answer. Just tell the dyno guy what you want to do before he starts.
should be interesting.
Took me a lot longer than a minute to unplug that puppy. It's a hard place to get yer hand into.
that cause your old and stoned 
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2006
Posts: 3,099
Loquacious
|
|
Loquacious
Joined: Feb 2006
Posts: 3,099 |
Hey, I resemble that remark!  From what ScottDog explained in another post: Or, my take on it: When you do a dyno run, the throttle is wide open. So the spark is at full advance. If you disconnect the tps, it goes to full advance (default). Same thing, right?
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
|
|
Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
...When you do a dyno run, the throttle is wide open.
So the spark is at full advance. If you disconnect the tps, it goes to full advance (default).
Same thing, right?
Basically, yes.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Quote:
I ain't laughing.
I am
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Aug 2005
Posts: 2,525
Loquacious
|
|
Loquacious
Joined: Aug 2005
Posts: 2,525 |
Quote:
OK...so I disconnected my TPS a few days ago to see what all the hoopla was about. Here is my experience....
BEFORE:
Freak (K&N pods for those that want to split hairs), Specialty Spares long cannons, 150 main, 45 pilot, dont remember the turns out.
The bike ran just fine. No issues at all.
Smooth throttle response off the line.
Plenty of power for what it is.
No major popping on decel, rather a nice low burble as the rpms came down
No backfires etc...
So why did I do it you ask...cause theres always something else to try to make things better and so many people liked what it did for them. Oh...and I love to tinker
AFTER:
No change in setup other than re-connecting the TPS.
Off the line throttle response was bad. The bike wanted to die first before it would take off.
I noticed a backfire usually in situations where the RPMs were high (over 4000) and I needed to pull the clutch for a quick stop. Not a loud backfire but I could hear and feel it.
Didnt notice a change in popping on decel.
Didnt notice any increase or decrease in power.
Oh well...I guess I can not report positive results with this one. I guess my bike is just set up right
so your bike ran like crapp with the TPS disconnected?
Erwin
05 America
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Quote:
so your bike ran like crapp with the TPS disconnected?
Not like crap but noticeably worse in respect to backfire and off the line response. It felt like it wanted to die on takeoff unless I realy throttled up.
Normally its smooth as glass of the line and only backfired a couple times on startup but NEVER while riding or on decel.
Last edited by Zmilin; 09/04/2009 8:41 PM.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2007
Posts: 23,179 Likes: 55
Fe Butt
|
|
Fe Butt
Joined: Feb 2007
Posts: 23,179 Likes: 55 |
Quote:
When you do a dyno run, the throttle is wide open.
So the spark is at full advance.
If you disconnect the tps, it goes to full advance (default).
Same thing, right?
Well not exactly since the dyno run the operator starts at closed throttle and opens it to get the full range and if default is full advance then you start at full advance instead of the normally retarded starting position then advancing as the engine runs faster. Not sure how much impact the TPS sensor has on that though since throttle position changes as you move through the gears and the advance should change as the engine runs faster not as the throttle opens and closes since the ignition has to keep up with the RPM not the throttle position.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
|
|
|
Re: Disconnect TPS
|
Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
|
|
Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
...Well not exactly since the dyno run the operator starts at closed throttle and opens it to get the full range ...
Now we're getting technical, however for practical purposes the CV carbs are WOT above approx. 3500 RPMS (& lower)on a conventional dyno run. That said, a dyno ain't the street.
|
|
|
Re: Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
Quote:
I ain't laughing.
I am
Okay that's it! I'll never lead you unscathed through all the radar traps again. Yer on yer own next time!!!
Now let these guys get back to discussing TPS stuff. Whatareya... stoned or something!!
Live to love, love to live.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Aug 2005
Posts: 2,525
Loquacious
|
|
Loquacious
Joined: Aug 2005
Posts: 2,525 |
Quote:
Quote:
so your bike ran like crapp with the TPS disconnected?
Not like crap but noticeably worse in respect to backfire and off the line response. It felt like it wanted to die on takeoff unless I realy throttled up.
Normally its smooth as glass of the line and only backfired a couple times on startup but NEVER while riding or on decel.
Thanks Z. I leave mine connected. I dont really have any issues either. Proper set up I guess...........
Erwin
05 America
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Erwin, give it a shot. Its only a plug and if it makes a positive difference then you know.
If it makes no differenc then there will be two of us that had a "worse result" result.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
I've been looking for a pic of where the tps is located but can't find any. From what I've read the TPS can be disconnected by unplugging some wires which are positioned between the carbs and that they aren't that easy to get to. So is that enough info for me to look for and then be sure that I am disconnecting the right wires? I've also had a look at this eliminator kit so if I do find my bike runs fine without the tps, am I right in assuming it'll be self explanatory in how to I can fix this kit to the appropriate spot??? thanks to anyone who can answer these questions but I just wanted to get it sorted in my head before pulling plugs that I don't know about. Btw, I've looked at both my manuals and there wasn't enough info in them for me to work on. cheers Staffo
Last edited by Staffo; 09/06/2009 11:22 PM.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2007
Posts: 5,616
Check Pants
|
|
Check Pants
Joined: Mar 2007
Posts: 5,616 |
Staffo, The TPS is that black thing on the throttle side of the carbs. It has wires in a plastic loom running around the carbs (mine run under). The plug is a triangular shape and is not hard to get to but not easy either. The wires may be held in place by a platic clip between the carbs. Just follow the plastic wire loom. Heres a pic of the TPS: 
Last edited by Zmilin; 09/06/2009 11:50 PM.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
Your a champion Zdenko. It's funny you know cos when I first started reading this thread that's what I thought it was but for some reason the more I read the more I started thinking it had more to do with some part between the carbs. I now understand that no, that's where the other connection is to them. It also makes complete sense when I look at the carb pic So thanks again my friend. Staffo. btw, I'm in the process of doing my 24k miles svc and was thinking I might as well get rid of the tps if it doesn't have any real usable function. I also believe the more parts you have, the more that can go wrong
Last edited by Staffo; 09/07/2009 6:21 PM.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
It takes a certain kinda non-conformist, free spirited, avant garde kinda guy to pull the plug on that TPS. I'm predicting you'll feel better after 'disconnecting.'
Live to love, love to live.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
Quote:
It also makes complete sense when I look at the carb pic
Hmm, wonder if they mail to the UK.. I like the look of that 
Yep they do and Ive ordered one..
Just got back from the dyno and the results show a VERY small improvement with the TPS disconnected.. its VERY slight but hey.. its on the right side 
Last edited by TrOjAn; 09/08/2009 8:55 AM.
TrOjAn
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Quote:
It takes a certain kinda non-conformist, free spirited, avant garde kinda guy to pull the plug on that TPS.
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Jan 2005
Posts: 1,012
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,012 |
Ok here is another yes for disconecting the TPS.. Just did it and back from a short ride.. Popping? NONE what so ever But question is.. did i take some of the soul away from the bike?! For the past 8 years i have always had some popping regardles of the setup and now nothing!  I suppose i will get used to it, the TPS stays dissconnected 
Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Even though it showed me nothing on the dyno, I may unplug mine for a while and see if I can get any of the results you guys are. I might as well do it, it's a free mod.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Apr 2007
Posts: 3,059 Likes: 8
Loquacious
|
|
Loquacious
Joined: Apr 2007
Posts: 3,059 Likes: 8 |
Has anyone done a comparison of the horsepower in the midrange with the TPS disconnected? Doesn't seem to affect the top end. Curious about everything else.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
|
|
|
Re: Disconnect TPS (malarchy)
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Are you talking about at cruising rpm? Like around 3-4000? I may have to do that next time I go dyno.
Now, as far as disconnecting mine, I got my bike out today, started it up, choke out, disconnected the TPS, immediately sounded better at full choke idle. Got warm, rode down the street, wait for a red light, seems good, start moving again, there was a tiny lug in acceleration before right off the line, that's now gone. No popping when decelerating. This was 2-up, I'm riding tonight solo so I will see if there is much difference, but it almost feels like the roll-on power was a little less than usual. Of course, 2-up is going to feel different than how I normally ride, so riding later will give me a little more info. So far, nothing bad, so I'm going to leave it off for a while as long as it still pulls strong throughout the range. I'm with Staffo also on less parts left to break means less parts breaking.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
TPS Eliminated
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Today I recieved the TPS Eliminator from LC Fabrications. I know she's dirty, but here's what the RH carb looks like now:  This coming winter I think I'll try to clean up all the wiring in the bike. I saw LC have this diagram that may come in handy...?
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: TPS Eliminated
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Looks good! If I go that route, I may have to polish that piece. Had a good ride around last night solo with the TPS disconnected, and have to say, I think it's staying off. Passed the highway test, roll on power is solid, acceleration is good, I did get it to pop a couple times, but she had to really work for it (55 in second gear, then let off).
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: TPS Eliminated
|
Joined: Jan 2005
Posts: 2,416
Oil Expert
|
|
Oil Expert
Joined: Jan 2005
Posts: 2,416 |
Yeah Dave, it could use a little polishing for sure. Easy job to do, but I was anxious to try it on. Good to get rid of that cable though.
"Wise men speak because they have something to say, fools because they have to say something."
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
Heres a DYNO taken this week. It shows the slight difference with the TPS off. Blue is connected and red is disconnected, as you may spot, the blue line never hits max revs, for some reason the bike cut out!! with the TPS off it revved higher but still cut out before max revs. Also so you know the clutch slipped on the 2nd run. I had the wrong oil in, anyway, replaced clutch and will be out on bike this Sunday..  If ANYONE wants a larger picture you can view it here: http://uktrash.org/speedmaster/dyno.jpg
TrOjAn
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
This is exactly why I said there was no noticeable difference when I did the same thing on the dyno. You could probably get the same amount of variation in 3 consecutive runs with it connected, or 3 consecutive runs with it disconnected. The runs will all show some degree of difference, even if it is ever so slight.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2005
Posts: 2,726
Loquacious
|
|
Loquacious
Joined: Aug 2005
Posts: 2,726 |
Looks like very little difference. What is the potential negative to disconnecting?
Bob
2005 America, 904cc - sold. 2014 Trophy SE.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
The dyno shows little gain but the riding experience after disconection is brilliant.
There is a better ride awaiting anyone that disconnects it... try it, if its not better its a few seconds to connect it back up.
As for negatives? I dont know of any..
TrOjAn
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Quote:
The dyno shows little gain but the riding experience after disconection is brilliant.
There is a better ride awaiting anyone that disconnects it... try it, if its not better its a few seconds to connect it back up.
As for negatives? I dont know of any..
And since I disconnected mine just yesterday, I will agree with all of that 100%
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: TPS Eliminated
|
Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
|
|
Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
Today I recieved the TPS Eliminator ...
Very nice! 
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
There is a better ride awaiting anyone that disconnects it...
Well not quite... Z pulled the plug then put it back. His testimonial is in this thread. But most of us TPS-be-goners seem elated... well at least thrilled... well, certainly happy to ride unplugged. As for me I've done about 8000 km since my disconnection date with NO adverse effects. I've ridden hot and cold weather, lower and higher elevations, fast and slow, easy and hard and every ride's been perfect.
She pulls like a team of horses, responds like a jack rabbit and purrs like a lion on deceleration. I had to adjust my idle down a bit, the throttle seems more sensitive... and the pipes are a bit quieter (I think).
As a non-technical kind of guy I can only share experience, not know how. But I tell you... it's nice making cool changes that cost nothing... like adding air to a low pressure tire, or adjusting the rear shocks (hey Z?).
Live to love, love to live.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 1,012
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,012 |
Quote:
She pulls like a team of horses, responds like a jack rabbit and purrs like a lion on deceleration. I had to adjust my idle down a bit, the throttle seems more sensitive... and the pipes are a bit quieter (I think).
That sums it up well, exactly my observations when disconecting on my bike
But,
We tried it out on Nillas bike yesterday, Her America is bone stock except for Raask exhausts and no snorkel.
It did almost cut out in the midrange rpm´s and run like crap.. so question is does the TPS work together with AI on a stock bike or what could be the difference?
Johann
Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
hmm, Re: Mountainman and Gooseman, it does seem like the majority of people get positive results, without bike specifics in the equasion its going to be hard to say why they have issues and the others dont. Gooseman may be correct in saying it works alongside the AI on stock or near stock bikes... The one saving grace on this is its FREE to try and 100% reversable so to try and die aint going to hurt anyone, and then you may be like some of us and never look back.. I love my Triumph now its back to running great, out on a run tomorrow, Ace Cafe to Brighton so that should run in my new clutch that I put in yesterday Ride safe,
TrOjAn
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 1,012
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,012 |
Trojan,
Do you have a Air/fuel graph from the dynoruns?
Any change there?
Johann
Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2007
Posts: 410
Adjunct
|
|
Adjunct
Joined: Jul 2007
Posts: 410 |
Quote:
Trojan,
Do you have a Air/fuel graph from the dynoruns?
Any change there?
Johann
No air / fuel graphs, it was a real fast dyno run as I was really short on time, as luck had it I was able to get the TPS connector apart, burnt my hands on casings but hey, were hard aint we? LOL
TrOjAn
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 1,012
Learned Hand
|
|
Learned Hand
Joined: Jan 2005
Posts: 1,012 |
Gooseman
Bonneville America 904 Black/Silver
Triumph Tiger 1050 Black
Ducati Multistrada 1200s
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
If I disconnect my tps and find like most others they feel there are no negative and appear like more positives, if I then put on the eliminator kit what do I do with the disconnected end? I haven't yet had a look to see what the connection looks like but shouldn't it be stopped off in some way to prevent moisture or am I just being pedantic. 
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Have to agree with you Staffo... that open connection should be sealed. I just wrapped it with e-tape. Coulda greased it up too... probably will.
Live to love, love to live.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 122
Adjunct
|
|
Adjunct
Joined: Jan 2005
Posts: 122 |
The TPS Eliminator has a built in o-ring seal so no vacum or dirt is going anywhere. And it is possible to change back if you feel like that later on.
Hasse
Hasse TBA -02 Pre-Fire Cardinal Red, Wiseco 904, Thunderbike pipes, Freak
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
Thanks Hasse, I actually meant the other end cos I've already got the eliminator kit. I will stop it off some way but was just interested in how others did it. Yeah, I could just use some tape but I've still got to find the bugg#r yet so I'd prefer something more permanent so I know it'll be right without checking. BTW Hans, I just put your new dyno numbers into the table. Nice work mate
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 122
Adjunct
|
|
Adjunct
Joined: Jan 2005
Posts: 122 |
Thanks!
Since my days as an offshore diver I'm used to use water resistant and non-conductive silicon grease for insulating electrical connections and I have done so on the bike also.
Hasse
Hasse TBA -02 Pre-Fire Cardinal Red, Wiseco 904, Thunderbike pipes, Freak
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
cheers Haas I'll soon be wanting to go through as many connections as I can and use some grease designed for applying to connections to stop them corroding. Seems there are a few on here who have had probs with poor connections after a their bikes are a few year old. Also, if you aren't as technically savvy as some on here, finding the offender wouldn't be an easy job I don't expect.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
nobody has mentioned the tiny star bolts w/ the raised post in the middle - how do you get these off, can I get a proper bit at Napa etc? I thought it might be easier to get to wires for disconnect if I first removed the carb end to get some slack for reaching the plug, then remounted it.
Hot Pipes
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2008
Posts: 1,169 Likes: 14
Learned Hand
|
|
Learned Hand
Joined: Jan 2008
Posts: 1,169 Likes: 14 |
Quote:
nobody has mentioned the tiny star bolts w/ the raised post in the middle - how do you get these off, can I get a proper bit at Napa etc? I thought it might be easier to get to wires for disconnect if I first removed the carb end to get some slack for reaching the plug, then remounted it.
it is a hollow torx bit also called a saftey torx, you should be able to get them at Napa or any other auto parts store.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Quote:
nobody has mentioned the tiny star bolts w/ the raised post in the middle - how do you get these off, can I get a proper bit at Napa etc? I thought it might be easier to get to wires for disconnect if I first removed the carb end to get some slack for reaching the plug, then remounted it.
Not sure you'd want to take that puppy off until you know for sure you'll be riding with TPS disconnected.
Live to love, love to live.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
OK, call me stupid, unmechanical, or whatever - I got good access to the TPS plug but I can't seem to get it apart, I can't even see where it should separate! Any help appreciated, wise cracks optional.
Hot Pipes
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
|
|
Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
IIRC one side of the plug has a locking lug that needs to be pressed in as the halves are separated. A small flat blade screwdriver should work.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Yeah, IIRC Ken's right. There is some sort of click mechanism that holds the connection together and you have to release that before it pulls apart. But it ain't just you there James... that was a tight spot for me to work in too... finally got some help and found having 3 hands worked better than two.
Live to love, love to live.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
I have to ask, has anyone experienced a lower fuel economy rate since disconnecting? My last rally trip had me at about 110 miles to reserve on the interstate, in the summer I was closer to 130 before reserve. Could it just be the cold air causing a rich condition? Of course, it could be the Thruxton needles as well. Dangit, I guess I need to get back to the dyno.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Disconnect TPS
|
Joined: Mar 2009
Posts: 12,964
Stickman Yogi
|
|
OP
Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Nope... didn't notice any change in mileage there Dave. I'm getting upwards of 140 miles before reserve without TPS. But then again there are so many variables to consider... just saying didn't notice any noticeable change.
Live to love, love to live.
|
|
|
Re: Disconnect TPS
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
Yeah, I'm guessing it's my needles more than anything. I need to change my mains and possibly my pilot jets.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
I suspect I will only need access to one size of these special types of torx head renoving bits, and that's for removing the "whatsamecallit" so I can fit the eliminator kit. So can someone please tell me what sized Quote:
hollow torx bit also called a saftey torx
I should ask for???? and,
Is there any other similar bolts on our bikes that need the same safety torx removing tool bits because maybe I do need to get a set. I don't know but it looks like Triumph didn't want us removing it for some reason.
Thanks in advance for anyone who can help because I don't want to waste my time buying the wrong size. Otherwise I'll ride my bike to the store and ask the tool shop if I can see whether the bit fits.
Just prefer the first option that's all.
cheers
staffo
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 5,172
Saddle Sore
|
|
Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
The one that fits the TPS cover is a T20. The only other use on the bike that I know of is on the tank badges, and that size is a T25.
Rather than buy screwdriver-handled torx tools, you can buy a set of bits instead....
More flags
More fun!
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
Bought a set of 6 or 8 safety Torx bits w/ a 1/4" drive socket in plastic holder at Napa for $10. My BMW K1100LT has some of these bolts also, seemed worth having the set for the low cost
Hot Pipes
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
We don't have a Napa store here but I'll go somewhere equivalent and see what they have. If I can buy a cheap enough set of bits I will, particularly now I know the size of the ones of particular importance . Otherwise I'll just buy the T20 safety torx bit for the tps removal kit. Thanks for your responses.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2009
Posts: 1,228
I live in the sun downunder
|
|
I live in the sun downunder
Joined: Jan 2009
Posts: 1,228 |
Quote:
We don't have a Napa store here but I'll go somewhere equivalent and see what they have. If I can buy a cheap enough set of bits I will, particularly now I know the size of the ones of particular importance .
Otherwise I'll just buy the T20 safety torx bit for the tps removal kit.
Thanks for your responses.
Hey Staffo. I removed mine by cutting a small slot in the head with a small hacksaw blade and then using a screwdriver.
FrankW
Ex Speedmaster rider, went to the Dark Side now riding an America.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
Hey Frank, nice one. That's what I'll do. Might use my dremel just because I can. thanks for the tip 
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2009
Posts: 1,228
I live in the sun downunder
|
|
I live in the sun downunder
Joined: Jan 2009
Posts: 1,228 |
Be carefull with that dremel, those carbies are rather soft.
FrankW
Ex Speedmaster rider, went to the Dark Side now riding an America.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2009
Posts: 1,228
I live in the sun downunder
|
|
I live in the sun downunder
Joined: Jan 2009
Posts: 1,228 |
After reading all the reports about disconnecting the TPS, I decided to disconnect mine today. I have just come back from a 315 Klm run with the local Ulysses club and I can report the following..
1. Bike seemed to accelerate better or is my seat of the pants dyno out of tune!
2. There was a definite improvement in fuel consumption. (about 5%)
3. All popping from the exhaust has gone.
4. The only problem I found was that when I started the bike if backfired through the carbies. It only did this once and might have been me doing it with the throttle partly open i'm not sure.
Last edited by FrankW; 10/29/2009 1:36 AM.
FrankW
Ex Speedmaster rider, went to the Dark Side now riding an America.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
I'll take it easy with the dremel. I also want to put my new Memphis Shades big shot on this weekend cos I'm going for a 3 day ride next Friday
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
That's good news Frank. I'll see how mine goes on my next 3 day ride starting Friday. Hopefully I too can believe there is a small difference. Thanks for the news.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
I don't know what's happening but here's my report: I took off the TPS and put the LC cover on the carb, didn't unplug the wires, ran like it had Swine Flu - no power, no acceleration, just weak and sick. So as I was replacing the TPS I noticed that the mounting holes were actually SLOTS, so I twisted the plug as far counterclockwise as possible before tightening the screws and VOILA! - suddenly I had a tiger in my tank, better starting, much quicker throttle response, smoother idle and slow start rolling in 1st gear, and my pipes sound more like a real motorcycle! Acceleration and power appear to be increased also, so I think I'm going to stop fiddling for awhile at this point and enjoy the few riding days I have left before the dreaded "S" word sets in.
Hot Pipes
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Apr 2007
Posts: 3,059 Likes: 8
Loquacious
|
|
Loquacious
Joined: Apr 2007
Posts: 3,059 Likes: 8 |
By removing the TPS from the carb without disconnecting the plug, your engine timing could mess up. From what I understand (pipe up if I'm wrong) the TPS would signal the ignitor unit that the engine is idling because it wasn't attached to the carb, but the pick up coil would be sending a signal to the Igniter stating that the engine is accelerating. Conflict. Disconnect the plug and then check. If you reinstall the TPS it has to be adjusted as per TPS Adjustment
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jul 2009
Posts: 127
Adjunct
|
|
Adjunct
Joined: Jul 2009
Posts: 127 |
Yeah Gregger, as I was thinking about it, the engine ran like it was v. retarded timing and I realized that it would be sending incorrect info while still plugged in, so I still have to get to that darn plug (as soon as I have a 3rd hand to help!
Hot Pipes
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
I've just returned from a 800 klm ride after disconnecting the tps all together and putting on a removal kit. I can't say the bike ran soooo much better or anything like that but I can say she is running as well as she has ever run in the past but much of that too I believe has also been due to my hand and info from dyno runs etc and of course this place. Overall I haven't struck any adverse effects from the disconnection so I just siliconed up the unplugged section (btw, it took 20 minutes to get the bug#er apart) cos the way I see it, it's just one more unnecessary part that won't give me grief in the future.  It also tidies some of our wiring up just a little bit more which can't be a bad thing. Overall, thanks to those guys who figured this one out.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
|
|
"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
So is this the longest running thread ever or what? Let me qualify that, the longest running non-event-related thread ever?
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2007
Posts: 10,714 Likes: 4
Should be Riding
|
|
Should be Riding
Joined: Aug 2007
Posts: 10,714 Likes: 4 |
no need to let a good thread die
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
|
|
Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
well time to revive an old thread.
have any of you found that after all this time there have been any negative affects from just unplugging the tps.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2010
Posts: 1,738
Learned Hand
|
|
Learned Hand
Joined: Aug 2010
Posts: 1,738 |
I plugged mine back in because I couldnt notice much of a difference. 
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Feb 2005
Posts: 20,096 Likes: 2
Fe Butt
|
|
Fe Butt
Joined: Feb 2005
Posts: 20,096 Likes: 2 |
Quote:
I plugged mine back in because I couldnt notice much of a difference.
You really DO owe bigbill a bigthanks ya know, Steve!!!
Yep! Just like a good Single Malt Scotch, you might call me "an acquired taste" TOO.(among the many OTHER things you may care to call me, of course)
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2010
Posts: 1,738
Learned Hand
|
|
Learned Hand
Joined: Aug 2010
Posts: 1,738 |
oh of course I do. These are soooooo much fun 
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2010
Posts: 1,738
Learned Hand
|
|
Learned Hand
Joined: Aug 2010
Posts: 1,738 |
Thanks Bigbill you are the MAN!! 
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 6,821
Bar Shake
|
|
Bar Shake
Joined: Jan 2005
Posts: 6,821 |
Contra todo mal, mezcal; contra todo bien, también
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2007
Posts: 575
Adjunct
|
|
Adjunct
Joined: Aug 2007
Posts: 575 |
Quote:
I plugged mine back in because I couldnt notice much of a difference.
Ditto
What goes round comes round
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Dec 2006
Posts: 2,150
Oil Expert
|
|
Oil Expert
Joined: Dec 2006
Posts: 2,150 |
My question is, If you couldn't notice a difference with the Tps disconnected, why would you reconnect it? After all you wouldn't notice a difference reconnecting so why have wires sitting there doing nothing of any value. I can guarantee my bike is running as sweet and reliable as he ever has which is a combination of various changes. Only one of them is the tidying up the Tps area. I'm just not convinced the euro emissions methods are all what they are cracked up to be. After all, if you are getting the best burn possible then there is less unburnt gasses and less bad sh*t entering the atmosphere. There has to be more to it than my simplistic approach surely?
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2010
Posts: 1,738
Learned Hand
|
|
Learned Hand
Joined: Aug 2010
Posts: 1,738 |
Quote:
My question is, If you couldn't notice a difference with the Tps disconnected, why would you reconnect it?
That is a good point. I would like to give you a reason for this action however I am  . I will try anyway.
Some time ago when I had only just unplugged the TPS a couple of days before, I stopped the bike for fueling up. When I tried to start it again, it wouldnt start. The first thing that came to mind was the TPS plug I had disconnected, so I reconnected it. Of course this did not solve my problem as it was a new battery I was needing which I later rectified. So that is why I plugged it back in and as it made no difference anyway I decided to leave it alone.
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
|
|
Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
noone has had problems from the CDI after running this way for a while. what timing advance mechanism is being used on our bikes. I get that the igniter and the tps working with the pickup coil is giving the info needed to adjust the timing. I had the alternator cover off but only to turn the crank as I did the valve adjustments. I didnt look at the pickup coil adjustment or mounting mechanism to see how it worked I was buisy elswhere. I can't afford a CDI at this point in history.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
|
|
"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
I didn't notice much difference and I reconnected mine just so I wouldn't have a "loose" wire hanging off the carb. Yeah, I could tuck it in but what's the point?
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
|
|
Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
some where in this monstrosity of a therad there is an elimination kit. I may just try that and see.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Aug 2009
Posts: 1,478 Likes: 5
Learned Hand
|
|
Learned Hand
Joined: Aug 2009
Posts: 1,478 Likes: 5 |
Last edited by Two_Wheel_n; 01/03/2011 7:46 PM.
'04' Black America
|
|
|
Re: TPS Eliminated - My DYNO run
|
Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
|
|
Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
|
|
|
|
|
