 Re: single carb for parallel twins
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Joined: May 2010
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Check Pants
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Check Pants
Joined: May 2010
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A pic from both sides and maybe a pointed down angular with the tank removed and I'll nominate you for a Pulitzer 
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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Do they have a photography Pulitzer? I could never win that one.
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
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Re: single carb for parallel twins
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Joined: May 2010
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Check Pants
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Check Pants
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C'mon man, it's a special BA.Com Pulitzer, work with us here.
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Re: single carb for parallel twins
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Joined: Apr 2007
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Loquacious
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Loquacious
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Is that carb coming out at an angle? Can you take a side pic showing the engine along with the carb. Both sides appreciated.
Thanks Loads.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: single carb for parallel twins
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Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
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"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
Worst. Marketing. Ever.  
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Re: single carb for parallel twins
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
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Quote:
Worst. Marketing. Ever.
Hey, remember when we waited on "Pins and Needles" for the new Victory model, there was even a countdown clock. Maybe Chad knows what he's doing.
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Re: single carb for parallel twins
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
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Quote:
Quote:
Worst. Marketing. Ever.
Hey, remember when we waited on "Pins and Needles" for the new Victory model, there was even a countdown clock. Maybe Chad knows what he's doing.
One million one hundred and sixty two, one million one hundred and sixty one, one million one hundred and sixty, one million....... 
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: single carb for parallel twins
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Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
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"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
Quote:
Maybe Chad knows what he's doing.
DAMMIT! I was almost taking a sip of coffee when I read that! You almost owed me a new monitor...
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Re: single carb for parallel twins
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
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Chad is attempting to make a two into one intake that will feed and fuel both cylinders at the same velocity/fuel air in spite of our 270 degree timed engines? IMO, velocity management would be inherently easier to regulate on a T. 360 degree mill than our lopey engines. It may as well, take some trick researched out timing, and a necessary program change to our ignitions to fully realize any real gained performance beyond stock. He has the ambition and stated solid help with the engineering part, obviously he has time and money involved as well. Looking forward to the projects conclusion when Chad is ready to share it with us in its entirety. Make this work, Chad, and you will sell enough of these to make it all worthwhile. I believe in you.
Sometimes I forget to remember, I can always find sympathy in any dictionary, right between sh*t and syphilis
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Re: single carb for parallel twins
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
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Quote:
Chad is attempting to make a two into one intake that will feed and fuel both cylinders at the same velocity/fuel air in spite of our 270 degree timed engines? IMO, velocity management would be inherently easier to regulate on a T. 360 degree mill than our lopey engines. It may as well, take some trick researched out timing, and a necessary program change to our ignitions to fully realize any real gained performance beyond stock. He has the ambition and stated solid help with the engineering part, obviously he has time and money involved as well. Looking forward to the projects conclusion when Chad is ready to share it with us in its entirety. Make this work, Chad, and you will sell enough of these to make it all worthwhile. I believe in you.
Sometimes I forget to remember, I can always find sympathy in any dictionary, right between sh*t and syphilis
Nice job of showing Chad some "sympathy" Ryk
Joking,joking!Only joking!
I hope Chad can make it work too!
Years back I was told of a single carb deal for my twin carb 600 VLX honda that supposedly increased power.I asked about it on a forum and was told ,why swap 2x36mm carbs for a single 40mm.
Having ten thumbs and knowing nothing I didn't pursue it after that.
I hope Chad makes this work.It'd be a great mod.if it provides more power.Only one carb to fool with.What's not to like?
As a matter of fact Chad,you could maybe approach Triumph themselves once you get the little problems worked out.Jst a thought.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: single carb for parallel twins
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
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Yea, why didn't corporate Triumph offer or do this? They had the precedent one carb model, historically. Oh wait, they gave the Tiger name to another type of bike. I'm not sure that a bigger carb is needed as only one side hits at a time. I could be wrong about that, though. I wanted to try this since the first day I looked over the fuel arrangement. Back in the 70 s I had a 70 TR6R and a 76 TR7RV..Tigers, even factory racers had one carb, The TR6C. It's the damn 270 timing thing, that made me unsure as to not try and tig weld one up. I have a good condition sidedraft carb (SU) from a TR-4 sports car, I think that would work just dandy, not to mention would polish up and look cool.
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Re: single carb for parallel twins
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
I'm waiting impatiently to find out Chad's conclusions and I agree it's great people put themselves on the line to research things.I'm especally interested in more power with a carb change.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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Thanks Ryk, for the support. I want to share with you guys and am excited about the project. I don't want people to see the set up and spend time and money on doing it with out the help that I have. It would be an exspensive failure. There is more to it than a "Y" and a big ole carb. That carb is modified tremendously and the intake is not a simple "Y". When its ready and the bugs are out of it. I will post lots of pictures, and information on it. It is going to be very cool when its done. I may have gotten over zealous and posted too early but, hey man, this is exciting stuff ya know.
Thanks for all the support gentlemen.
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
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Re: single carb for parallel twins
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Joined: Jan 2006
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Monkey Butt
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Monkey Butt
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If you don't get gas the bike won't run. That is everything I know about carbs. Just to qualify myself as a serious expert on the topic. It sounds like a great undertaking. (We have two types of bikes among us with basically the only difference being the fuel system. Are the EFI bikes much more responsive with higher top end without the carbs?) So, why not make a carb replacement ie: a bolt on fuel injection instead. As stated above the hesitations and slow reactions are the problem as well as WOT not dumping enough fuel. (At 110 my bike runs out of HP IMHO) As you are inventing a solution to an obsolete form of fuel delivery. Will this be something the EFI bikes can retrofit for superior performance? 
I try to aggravate one person a day. Today may be your day.
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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Many people who are "hot rodding" their bikes remove the fuel injection system to put on performance carbs. Mine will run right up to 120 easy right now. I need to get it on a track to really test it out though. I don't know how well the efi bikes are doing as far as high performance goes. I guess I should test ride one. Anyone with efi want to chime in I would be glad to hear your input. 
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
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Re: single carb for parallel twins
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Joined: Aug 2009
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Learned Hand
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Learned Hand
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Re: single carb for parallel twins
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Joined: Jan 2005
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Learned Hand
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Learned Hand
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A single carb on a 360 engine I understand, but not sure how it will work on a 270 engine.
It will be interesting to see any dyno test results with a single carb versus dual.
Tom
Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin, US author, diplomat, inventor, physicist, politician, & printer (1706 - 1790)
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Re: single carb for parallel twins
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Joined: Feb 2007
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Fe Butt
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Fe Butt
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They work on HD and those pistons are not at TDC at the same time. The older ones did fire off 1 set of points though.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: single carb for parallel twins
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Joined: Jan 2009
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Adjunct
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Adjunct
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Re: single carb for parallel twins
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Second Wind
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Second Wind
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I am re-working the intake right now because I think I can get more out of it. A different tube showed a higher cfm. Last drag strip run was 110mph. I need to figure out how to raise the rev limiter rpms. If I didnt hit the rev limiter in third and fourth I think I would have a faster run.
Last edited by locopony; 06/12/2012 12:57 PM.
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
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Re: single carb for parallel twins
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Joined: Jan 2009
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Adjunct
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Adjunct
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Cool!- any chance of a left side model?
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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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
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Re: single carb for parallel twins
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Joined: Jan 2005
Posts: 2,152
Oil Expert
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Oil Expert
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Posts: 2,152 |
Quote:
I always like the single carb bikes better on the old stuff.
+1 but the benefit was mostly ease of tuning wasn't it? Rather than performance.
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Re: single carb for parallel twins
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Joined: Feb 2007
Posts: 23,220 Likes: 61
Fe Butt
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Fe Butt
Joined: Feb 2007
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My TR6C was always better running bike than any of the Bonnies I owned. Didn't seem to gain anything from the dual carbs and the better cam in the C model let mke walk away from them.
Can't see that S&S over a cable operated slide carb though.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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Switching to a mikuni for the project the S&S is too limited.
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
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Re: single carb for parallel twins
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Joined: Jul 2005
Posts: 85
Member
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Member
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Quote:
Switching to a mikuni for the project the S&S is too limited.
yay!
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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I am no longer working with the guys I was working with because I have found that his carb system, while its better than a stock S&S its still just a tractor carburettor. I am still a bit concerned about the top end with the Mikuni but its better than only having top end and no bottom at all.
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
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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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
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Re: single carb for parallel twins
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Joined: Sep 2007
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Adjunct
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Adjunct
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You're fighting a losing battle with one carb and restricting flow exactly where you need it, at the top end. That little filter will stop you getting to where you want to be on it's own without the airflow having to go round bends in the manifold. It'll be interesting to see your dyno runs.
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Re: single carb for parallel twins
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Second Wind
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Second Wind
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Yea thats a thought, However I am already faster than it was with the freak mod, and now its faster than it was with the S&S. But its good to have neigh sayers because that drives a fellow like me. On the quarter mile track my hole shot is my weak point not my top end.
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
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Re: single carb for parallel twins
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
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me and others (I think) would like to see Dyno result with power,torque curve and A/F ratio....not how fast it goes 
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Re: single carb for parallel twins
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Joined: Feb 2005
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Fe Butt
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Fe Butt
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Yeah Chad, and some mileage figures would be cool too. Ya see I'm particularly wonderin' if just runnin' the single carb there will increase the MPG.
(...you would think it would, but ya never know until ya get some real world tests)
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)
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Re: single carb for parallel twins
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Joined: Jan 2005
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Bar Shake
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Bar Shake
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Posts: 6,821 |
I'm wondering, with it off to the side like that have you tuned the intakes?
Contra todo mal, mezcal; contra todo bien, también
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Re: single carb for parallel twins
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Joined: Feb 2007
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Fe Butt
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Fe Butt
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Long intakes too what have you done about turbulence inside for a good mix? Do you have it supported so all that levered weight isn't hanging on the studs on the head.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: single carb for parallel twins
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Joined: Apr 2008
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Loquacious
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Loquacious
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Quote:
I am no longer working with the guys I was working with...
Sounds like NOW you've got more "help" (from BA.com) than you ever could have imagined! 
(Now, IF they'ed JUST throw in some MONEY!)
And you may see me tonight
With an illegal smile
J. Prine
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Re: single carb for parallel twins
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Joined: Sep 2010
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Second Wind
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Second Wind
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I haven't done a dyno run yet for 2 reasons; I can't seem to find some one who will let me do it here in Houston, and I'm not yet satisfied with my street results yet.
No Dwight, There is no fuel milage improvement, but I haven't tried tunning for that yet. In fact its worse not horribly worse but worse. about 40mpg as it stands.
Yes Bill, we did tune the tubes for even flow to each cyliner as far as cfm goes.
Ian, all of the above has been taken into account the wieght, and turbulance. The good thing is that the turbulance increased the cfm as well. Thats fun huh?
Yea erle, Thats ok though. They keep ya thinking.
\
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
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Re: single carb for parallel twins
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Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
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OP
Second Wind
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Real world results matter to me first.
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
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Re: single carb for parallel twins
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Joined: Sep 2007
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Adjunct
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Adjunct
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Quote:
Yea thats a thought, However I am already faster than it was with the freak mod, and now its faster than it was with the S&S.
How do you know this? "Seat of your pants" is very deceptive for mods where you gain or lose small amounts.
I can't remember how many times I have modified something, gone for a ride and think, "wow this is much better", then go for a dyno run and have lost some power. Perception is a funny old thing.
With the mods you are doing, you do need to carry out a run on the same dyno after each mod, otherwise you don't know where you are or where you're going.
Last edited by PieMan; 10/10/2012 5:52 PM.
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Re: single carb for parallel twins
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Joined: Feb 2008
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Loquacious
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Loquacious
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I concur with Mike. At the very least, a reliable wide-band AFM is necessary for optimal tuning purposes.
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Re: single carb for parallel twins
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Joined: Jan 2009
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Adjunct
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Adjunct
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that hsr is way better than the s&s for this app- get that thing tuned right and it'll smoke any pair of cv's out there- i'll guarantee it-
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