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Question about millling my set of L92 heads

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Old 05-16-2007, 08:42 PM
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Default Question about millling my set of L92 heads

Recently I discovered that my LS2 402 is going to be 11.4:1 compression, which I wanted more. I have a set of cometic head gaskets that are pretty thick, I don't know excatly how thick, but that will probably knock it down a little. So how much should I mill? Also, what compression will it make with say .030 milled. And also, will it affect the way the intake mounts, i.e. will I have to use different intake manifold gaskets etc.?
Old 05-16-2007, 09:15 PM
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You must have flat top pistons?
I milled .040 and used .040 Cometics. With that mill I am near the bottom (but ok) on the manifold to head gasket postion. The folks who milled the heads said .040 is as far as they would want to go allowing for a light cleanup in the future. All of that to get to 11:1 with -12 pistons.




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