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04-02-2007, 08:05am
RE the TRE:
Can't say about the lower 10k rev limit on a Busa, but I have seen gears make better power on various Suzukis. I've seen some make better power in 6th, until the last 500 rpm, where the ignition was intentionally retarded (cutting some high speed ability) and some other models made better power in 5th.
All testing was done under steady state dyno loading so that incorrect inertial mass values in a sweep test are not a factor.
RE Yosh cams in a Busa:
Usually see about 6ish improvement about 6kish with a bit (not horrible) of a low rpm power loss. Pretty good for a dropin item! :-)
We ended up designing a Megacycle cam that didn't lose below 6k and gained 6-8 True HP from 7k on up and uses stock valve springs. Just a bit improved and Megacycle is right across the street and I can usually get whatever I want ground up. Our machine shop makes their Ferrari and Maserati billet cam blanks.
All of the above testing experience is when using a steady state dynamometer test and results when using inertia loading in a 4th gear sweep test will probably be different in amounts of power and also the shape of the power curve, esp. past the power peak, where inertia power tests tend to drop off on high hp bikes.
If someone wants to know more about that great unknown subject, just ask -
Best regards -
Marc <i></i>
Can't say about the lower 10k rev limit on a Busa, but I have seen gears make better power on various Suzukis. I've seen some make better power in 6th, until the last 500 rpm, where the ignition was intentionally retarded (cutting some high speed ability) and some other models made better power in 5th.
All testing was done under steady state dyno loading so that incorrect inertial mass values in a sweep test are not a factor.
RE Yosh cams in a Busa:
Usually see about 6ish improvement about 6kish with a bit (not horrible) of a low rpm power loss. Pretty good for a dropin item! :-)
We ended up designing a Megacycle cam that didn't lose below 6k and gained 6-8 True HP from 7k on up and uses stock valve springs. Just a bit improved and Megacycle is right across the street and I can usually get whatever I want ground up. Our machine shop makes their Ferrari and Maserati billet cam blanks.
All of the above testing experience is when using a steady state dynamometer test and results when using inertia loading in a 4th gear sweep test will probably be different in amounts of power and also the shape of the power curve, esp. past the power peak, where inertia power tests tend to drop off on high hp bikes.
If someone wants to know more about that great unknown subject, just ask -
Best regards -
Marc <i></i>