I'm in the mid 12's mostly. My first tune was on a dyno and the target, which we hit, was 11.8. It's leaner now after more mods. Under 11 and I'd retune. Over 12.5 I'd retune. I'm on the borderline but I run 100 octane at the track. Well, realistically, about a 50/50 mix of 93 and 100.

Les