Quote: Wow! 12:1? I guess it's all about the cam. I can see bleeding off cranking compression, but no ping under load? I never thought you could be safe at 12:1 with pump swill.... guess I have a lot to learn!
It ALL comes down to the dynamic compression... my 14.1:1 has 185 cranking pressure
but what does that cylinder pressure become at 3000 rpm? cars don't tool around the streets on cranking compression.
