Dyno run of 2017 Street Cup - Triumph Forum: Triumph Rat Motorcycle Forums
Water Cooled Twins Technical Talk Technical Talk for water cooled Triumph Twins.

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post #1 of 7 (permalink) Old 08-19-2019, 11:56 AM Thread Starter
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Main Motorcycle: 2018 Aprilia Tuono 1100rr
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Other Motorcycle: 2017 Triumph Street Cup
Dyno run of 2017 Street Cup

About 2800 miles on the bike... So far the mods done:

TEC progressive fork springs and 15W oil, plus adjuster caps for preload
Dunlop Road Smart III tires
Fox shocks from Triumph Accessories catalog
K&N air filter, de-snorkel
Stock cans de-restricted(open flow)
TEC X-Pipe
V+H/latest tune loaded into ECU.

The results so far, which I wanted as a baseline before my dealer installs the TEC cam.

The new cam is on order. My dealer just did the 1200cc cam on a pair of Bobbers... Did the cam, exhaust, removed the airbox and installed pod style filters, and after a tune they picked up a solid 20hp at the wheel and the bike now power wheelies easily...

I don't expect such a dramatic increase on the smaller 900, but it would be nice if I can get the power up into the 60s somewhere, and see it pull harder into the rev limiter.

Thoughts?
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post #2 of 7 (permalink) Old 08-19-2019, 11:59 AM Thread Starter
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Main Motorcycle: 2018 Aprilia Tuono 1100rr
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Other Motorcycle: 2017 Triumph Street Cup
They said the intake on the Bobber was incredibly restrictive... They saw a 5hp increase at the wheel just by ditching the airbox for the POD filters...

Has anyone done this on the 900HT motor? Seems like it might be a point of restriction, the airbox is tiny...
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post #3 of 7 (permalink) Old 08-21-2019, 03:52 PM
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Question

Quote:
Originally Posted by SquireSCA View Post
About 2800 miles on the bike... So far the mods done:

TEC progressive fork springs and 15W oil, plus adjuster caps for preload
Dunlop Road Smart III tires
Fox shocks from Triumph Accessories catalog
K&N air filter, de-snorkel
Stock cans de-restricted(open flow)
TEC X-Pipe
V+H/latest tune loaded into ECU.

The results so far, which I wanted as a baseline before my dealer installs the TEC cam.

The new cam is on order. My dealer just did the 1200cc cam on a pair of Bobbers... Did the cam, exhaust, removed the airbox and installed pod style filters, and after a tune they picked up a solid 20hp at the wheel and the bike now power wheelies easily...

I don't expect such a dramatic increase on the smaller 900, but it would be nice if I can get the power up into the 60s somewhere, and see it pull harder into the rev limiter.

Thoughts?
What did you have to do to your stock cans? Is that baffle removable? Thank you! Looking good on the dyno already!

My other car is a Triumph
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post #4 of 7 (permalink) Old 08-21-2019, 04:29 PM Thread Starter
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Main Motorcycle: 2018 Aprilia Tuono 1100rr
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Quote:
Originally Posted by celticages View Post
What did you have to do to your stock cans? Is that baffle removable? Thank you! Looking good on the dyno already!
I took the stock cans off, removed the rivets from the end cap, and used a 3" hole saw on a drill to drill a giant hole and remove the narrow tube, then riveted the cap back on. Then on the other end, I took that restrictor plate with the small tube, and drilled holes around it and then knocked a 2.5" hole with a hammer and chisel to open that end up.
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post #5 of 7 (permalink) Old 08-21-2019, 05:55 PM
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Quote:
Originally Posted by SquireSCA View Post
I took the stock cans off, removed the rivets from the end cap, and used a 3" hole saw on a drill to drill a giant hole and remove the narrow tube, then riveted the cap back on. Then on the other end, I took that restrictor plate with the small tube, and drilled holes around it and then knocked a 2.5" hole with a hammer and chisel to open that end up.
Kudos to you because that is what I would call aggressive re-engineering! haha...I love it. In all honesty I was wondering what I would find if I drilled out those rivets. Does the internals come out to allow this work?

My other car is a Triumph
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post #6 of 7 (permalink) Old 08-21-2019, 11:17 PM
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Main Motorcycle: 2017 Street Twin
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Quote:
Originally Posted by SquireSCA View Post
They said the intake on the Bobber was incredibly restrictive... They saw a 5hp increase at the wheel just by ditching the airbox for the POD filters...

Has anyone done this on the 900HT motor? Seems like it might be a point of restriction, the airbox is tiny...
Last time I was at the dealer I talked to the owner. We were talking about my street twin, and he said that with the new 1200 Scramblers having a single throttle body as opposed to the dual on the thruxton, and that you could swap it onto a street twin. He said this was something they were going to do to one of their bikes they use on their dirt tracker race bike.
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post #7 of 7 (permalink) Old 08-22-2019, 12:53 PM Thread Starter
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Main Motorcycle: 2018 Aprilia Tuono 1100rr
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Location: Flowery Branch, GA
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Other Motorcycle: 2017 Triumph Street Cup
Does anyone know if the Street Twin/Cup has a PAIR or SAI system? Injecting air from the airbox, into the exhaust manifold to help clean up emissions?

Asking, because if my tuner feels that ditching the airbox and going to a larger POD style air filter will increase performance, I need something to attached the crankcase vent hose to. Normally I would route that to the PAIR/SAI and let that draw a slight vacuum on the crankcase vent and let it go out with the exhaust, which isn't a problem with the CAT removed due to the x-pipe...

I don't see a hose for that on this bike, but I am still pretty new to it...
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