Bonneville America Forums Forums Technical Forums Performance Mods New "Breath" Performance Intake Cover

Triumph Twin Power has just introduced the new Breath Intake Cover for the airbox equiped twins. I am really impressed with the Airflow Charts showing exactly how much better this unit flows air over the bellmouth and standard snorkel. Note the BIG INCREASE IN TORQUE in the midrange in the dyno run in the link supplied. Pieman looks like he has a super product here.

Looking forward to a review of this soon. I'll probably get one this winter.

That's pretty cool, Greg and thanks for bringing it to our attention. Think I will get one too!

may be a stupid question, but will this work on the speedmaster? on the pictures it looks like the t100. (i think)

I'm watching this breath talk how it will develop

I am interested too. But I wonder about the gains over the Polaris which I have. I already score the same HP and torque as his best config.

Regarding the design vs the Polaris ... The Bonnie's have less clearance between the top of the intake and their side cover ... hence this low profile design. I suspect that the America & Speedy would see a better flow from the Polaris Bell-mouth than is indicated in his graph because of this greater space under the seat.

I will definitely remove the air box baffle. I had assumed it was there to create a reservoir of air (not in turmoil). If it is just a sound baffle - out it comes. I love it that aftermarket stuff is still being created for our bikes.

ok. thank you gregger. i would really be interested in this.

This may be a stupid question,
I removed the snorkel on my bike put the K&N filter in and screwed the 3 bolt cap minus the snorkel back on.would this thing add anything to my power?
If so I'd be interested too.

Ok I looked at his figures and I see that installing a bellmouth or this "Breath" cover increases air flow.I will look into this.

Why is this better than just removing the snorkel?

Yes,that was my thought too.
The companies chart says it gets more air in but can that be possible with our set up?I wonder.

Ok... After having a closer inspection of their testing of the breathe it looks like I was wrong. Neither the Bonnie side cover or America seat are used in the test so the comparison between intakes is legit. The Breathe delivers nearly double the flow results of the Polaris or bare snorkel removal on the test bench. Impressive. And the increase can only come from improved laminar flow with the breathe design. I still believe the air box baffle removal plays an important role in the dyno figures.

Mac,Ken, thanks I understand now.As you say Richard,the air box baffle removal probably plays an important part too.

arrived today nice and shiny


compare with polaris bellmouth


intake opening much bigger


fitted (less shiny at this point )



lets fun begin with bike tunning...... A/F ratio gauge ordered

Dyno before and after would be fun stats to look at on one of these. You can get more air in the hole maybe, but how do you get more air through the filter? Once through, for balance you need the AF to be right. Then there is exhaust.

The snorkels were not there to reduce power they were there to increase velocity. I know after I rejetted, drilled pipes and took off the snorkels putting a K&N in It seemed to have more pep. After about a week I put the old filter and Snorkels on. It seemed the same. I took them back off but really didn't notice a difference.

I think our bikes have a lot more to do with the exhaust and fuel end rather than intake on the older ones. Maybe this will help the EFI bikes.

got recent dyno done week ago need to tune it first and there will be next dyno...

this happend when I changed top snorkel(cut at the bottom) for rubber velocity stack


diffrence -----68.4hp was 67.12hp
--------------57.46ft/lbs was 54.37ft/lbs

118 main jet (four sizes up)
needle rised clip 3rd position from top

3 more lbs. of torque is a good move up.

Ordered the Breathe today.

Richard,How much did it cost you?I saw something about 26+ pounds feight charges to Australia.Is that true?

I have been tossing up getting either the British customs air box removal kit from the states, or a "Breathe" from TTP.
I know the "Breathe" would be the easiest.Even I could install that, I think

Cheers,
Paul/

I just found out it was 75+ pounds total shipped to Australia
My mistake.

I'm having having a hard time trying to decide on the "breathe" ,or replacing the airbox with the BC kit.
I would need to re-jet either way.

Tough decision. From my POV I like the look with the side covers intact and eliminating the airbox is more complex with the EFI. Got to find safe homes for the ECM and extra electronic stuff and where do you put the ambient air sensor?

I am hoping to achieve dyno figures within cooey of the pods with these airbox mods. My research tells me it's possible.

I also think there may be inherent benefits in the airbox which has yet to be fully exploited given that i's primary design was for sound restriction and not as a true air box (if some of what I have read is to be believed). A well designed airbox can produce really good results because you can control air direction, you can increase air velocity and reduce air turbulence and have a relatively calm pool of air to draw from. Lofty goals and whether I can achieve any of that is ambitious to say the least.

I think the easiest and certainly the most well trodden route, if your want increased performance, is to get pods. I may end up there eventually myself.

If you delay your decision you will soon be seeing some dyno results from GRZ and myself (after Christmas) which should make your decision easier.

Hi Richard I may wait a while.The "breathe" and a re-jet is of course a much easier path.At the moment I'm leaning that way.
Like you,I'd mainly like a bit more torque.

I wish I could make my mind up.

Hey Richard,give us a yell when you get it and get it fitted wiil you?

Seat of the pants feeling will do for a start until you get your dyno done.

Cheers,
Paul/

No worries.