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each to their own, but if that was my engine with that compression & cam, i'd run 103-105 octane. our fuel might have a different rating but even so i'd take a jug of higher rated gas & try it out. you'd have to bump up the timing a bit but if it meant going faster i'd try anything.



I agree. Detonation cannot always be detected until your rod bearings drop out of the saddles. I understand what Mike is saying about the aluminum but with 11.5-1 I would use some amount of race gas-just to be safe.



what octane should i use??