WhiteVette007

If I was keeping stock cam and pistons, how much can the heads be milled? I've read .065 but how much more than that can it go?
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Rob 02

It is better to go with a thinner head gasket for quench and lower detonation. The chamber is maybe 2/3 the size of the bore so a .020" would have about the same effect as milling .030". I don't see why you would want a compression ratio that high because you will see diminishing returns and have detonation problems. Personally I would just deck the head .007" or so to make it flat and go with a .040" head gasket. That might bring you up to about, say 11.4 to 1 compression (still good for premium fuel if you lower the temps a bit). That might bring the HP up ~4% (~17hp).

Sorry I can't answer the milling question. Your concern is valve to piston clearance, right?

zeevette

Why would you want to go to the trouble of doing the head milling, and reuse a stock cam? You don't need a big, hard to drive cam to get a nice HP boost. For the money, and you're almost there mechanically, do the proper mods, like liifters, buckets, timing chain and oil pump. More compression is good depending on tune, and quality of fuel. More than HP, it gives you more torque. I've found it's easier to spend a little more and do it right the first time.