Quote:
Originally Posted by JSH
I shoot for 0.82-0.85
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Guess you are talking about Pump gas E10 and I guess on an LT4 ?
Forged material + lower C/R allows for a leaner mixture.
The LT1 with its cast pistons and tight ring gaps is likely less forgiving, so a little richer for safety and yes I saw some calibrators feeling comfortable even with 0.86-0.87 and then are usually more careful with spark advance and boost.