Re: Compression ratio vs Fuel grade?
Thanks guys. My options were either 8.6 or 9.2. I think I settled on 9.2. <br /><br />Something I learned is that with higher lift cams with a lot of overlap (non-marine) you can run higher compressions with lower octane fuel. Minimal overlap increases cylinder pressure hence more detonation with higher compression. However, to counter, a stroked motor increases the fuel burn time during the dwell at tdc which allows for higher compression before detonation would occur. <br /><br />Considering my original 302 has 7.9 compression. 9.2 in my new 331 stroker ought to be a virtual rocketship.
