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How much can you mill 1999 ls1 heads?

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Old 12-08-2010, 02:23 AM
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rustyguns
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Default How much can you mill 1999 ls1 heads?

Going to run a 228 cam and want around 11 to 1 static compression

mill the heads 20 thousands and use new gm stock head gaskets? Or ???????
Old 12-15-2010, 03:07 AM
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Originally Posted by rustyguns
Going to run a 228 cam and want around 11 to 1 static compression

mill the heads 20 thousands and use new gm stock head gaskets? Or ???????
.030
Old 12-20-2010, 04:45 PM
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0Jon@Texas-Speed
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You need to be down around 59cc on those heads to get to 11:1 on a stock bottom end LS1. The stock heads are on 66cc. At about .006-.007" per cc, you need to mill about .040" off those heads.

Jon
Old 12-20-2010, 05:02 PM
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Originally Posted by Jon@Texas-Speed
You need to be down around 59cc on those heads to get to 11:1 on a stock bottom end LS1. The stock heads are on 66cc. At about .006-.007" per cc, you need to mill about .040" off those heads.

Jon
I'm gonna go with the 706 heads..thank you for advice it is greatly appreciated!

Texas Speed Rocks!

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