Reply to "Compression too high?"

ausfordMember

I find high compression in a Cleveland is not the cause of pinging and detonation like it is in many other engines.

I put this down to Ford's quench chamber.

I have a 351C bored 0.030" over, with flat top pistons, quench chambered 302 heads with 57cc chambers and milled .020" and felpro head gaskets.
I run it on 91octane unleaded and have no detonation problems.

The pop up on those pistons does not seem very high, I can't see that it would have compression higher than my engine. I don't see any problem.

Beware of mechanics and engine experts suffering "small block Chevy syndrome"

The only thing in common with a 350 Chevrolet and a 351Cleveland is they are 4" bore.

They have nothing else in common.

11/7/166:16 PM

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