to beat a GM 602 crate

shredxcam said

I've only ever seen avgas 100.

i don't really deal with the stuff as i work on turbine powered helo's.

either way i figured at 100 octane its still better than 93 which is the highest i seen around here

some marinas at lakes I've seen sell higher grades

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theres alot more to a gas blend than lead an octain,...im no chemist so i wont even try to get into it but there is,...most crate racers round here run E85 of some sort with great results (rattman E85 has best dyno numbers)but need to keep a good check on the %s first time its E90 or E75 bad things happin! stuff burns cold,...after 30 hot laps carb be cold an moister be condensing on the carb an intake