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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
new peak power RPM formula
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[QUOTE="jaguar, post: 1460121, member: 19340"] I figured it out. I've analyzed numerous engines and found that using (time x area) / cc is a good formula for the exhaust port (when using blowdown area) but not for the transfers. I tried various formulas for the transfers and couldn't find one that worked on all engines. The only key I could find is that no transfers have less than a 1.43ms "transfer time" (see definition on [URL='http://www.dragonfly75.com/moto/blowdown.html']my site[/URL]). I offer a free Excel spreadsheet calculator on my site for people interested in correct modification of their engine. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
new peak power RPM formula
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