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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!



Jim, send it down here. 750 HP on pump gas won't be a problem. it is more than just a cam change to do it right though.

Ray, yours sounds tamer than the 590 MP cam until you push the pedal on the right.

machine shop owner and engine builder