Planning on 91 octane as that's what's most available here and we have it with no ethanol. All the calculators I used online (all vary to some degree) come up with about 10.15-10.25:1 with a 20cc dish. Figures the actual numbers are a bit lower should leave me at damn close to 10:1... I think. Dont think it's worth the slight power increase to go to 10.5:1 and worry about detonation. We do get some very hot days in the summer. I figure 10:1 is a safe but nice compromise
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