Originally posted by evo119
I've seen as high as 12.0:1 on 91 octane gas, however that's on a properly tuned engine. IMO I wouldn't go that high...JDM ITR pistons are good enough. Or JE Pistions with the same CR.
12.0:1 sounds about right. I wouldn't run too advanced timing on that high a cr.
the cheapest way to up your comp?? milling the head.