Originally Posted By cudadoug
Curious: What altitude is that track??

Generally speaking at 0 deck flat top piston with a 79.5 cc chamber is right at 11:1, depending on head gasket. That said, to be a 12.6 with milled 906's...is a very generous GUESS-timate.





I should have cc'd the heads and cylinders when it was out, but I had no time, the race was next morning. Anyway, that is not an issue, I want aluminum heads and I want most bang for the buck. Also, next time I will measure smile


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