Main Motorcycle: 2009 Bonneville SE
Join Date: Jun 2009
Location: Asturias, Spain
Other Motorcycle: Yamaha XV1100
Extra Motorcycle: Qingqi QM200GY-BA
|Air Cooled Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.
Sponsored by: Triumph Twin Power Ltd
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Ultimately, and I've already seen it done here, is to have a set of velocity stacks going from the carbs right into the airbox, or to pods if you prefer.
GeoRider, the theories would most probably be correct if the factory snorkel was designed for performance, but it was designed to muffle the induction noise which adds something else in to the equation.
The dyno below shows the effect the Breathe has on engine performance by directly replacing the factory airbox cover/snorkel with the Breathe, with corrected fuelling. It shows a significant increase in torque in the mid range and if you remove the airbox baffle, that increase carries on to the rev limiter.
It very interesting reading this these graphs.
At high revs, 6.5 k-8.0 k, when the motor needs more air, the power and torque are the same.
What conclusion can one take from this?
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