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Old April 11th, 2018, 06:26 AM   #14
cbinker
Track Clown
 
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Name: Chris
Location: Kingman, AZ
Join Date: May 2012

Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build

Posts: A lot.
MOTM - Sep '15
Quote:
Originally Posted by DannoXYZ View Post
That was 15-years ago, many new developments have occurred since that time. E85 is the current champion fuel with 105 pump octane rating. This allows for high-compression streetable engines that would've been temperamental monsters just couple decades ago. Or extremely high boosted (20psi+) engines.

Due to difference in specific-gravity, you can't just replace gasoline with E85 and expect more power. AFR will also be too lean due to diffence in stoichiometric ratio. So you'll need to re-program injector-duty cycle to match. Along with more ignition-advance and more compression and/or boost.
So the question that needs to be answered for many on this thread is:

What octane is best for a stock engine at the track?
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