Quote:
Originally Posted by Xist
Aerohead, do you remember approximately what kind of a difference that setup made for that motorcycle?
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Here is the engine map for the YAMAHA EXUP system.You can see how the torque profile is flattened
*I have a HONDA MC exhaust with valving,but just a butterfly valve,nothing as exotic as YAMAHA.
*Walker has been offering a passive/active,Dyno Max VT,valved exhaust since around 2011.
* The new Corvette Sting ray comes standard with a butterfly-valved,DUAL MODE exhaust that's good for 5-bhp.
*Camaro SS has a $895 Dual Mode option.
*I think Ferrari is doing it too,they talk of 'opening baffles'.
*Dinan High Performance Exhaust offers a butterfly-valved exhaust system for the BMW M5.
*Ford offers manually-removable exhaust inserts for their MUSTANG Boss 302,to make the exhaust louder.
PS,the Yamaha EXUP Patent would have expired in 2008?