Quote:
Originally Posted by taxonomy  There are gains, but only at WOT.
Also, I am not just talking about cruising around town here. Even in hard riding if you are not in the extra ft/lbs available at WOT, at any RPM you are not likely actually getting any benefit from an after market pipe unless you are at WOT. My guess is that most people never pin it. |
That is completely not true. There are so many variables involved that you can't make a blanket claim like that. The gains will be most pronounced at high RPMs and WOT which is the combination that produces the largest volume of exhaust gasses but you can still have legitimate gains at partial throttle and lower RPMs. It's also possible to lose power at low RPMs especially in bikes with radical cam profiles.