Thread: Building a ZZ430 clone. Question about quench, compression ratio, etc.

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Originally Posted by v6underpressure

So I like the recommendation of the felpro 1003 head gasket. But, humor me for a moment. The factory gasket is. 051". And the 1003 is. 041". So if I went with your recommendation of cutting the deck and using this gasket, wouldn't I actually have less valve clearance than my first suggestion? Anyhow, I'm looking at this another way now. I've read about great results with the felpro 1003. And I would actually prefer to use that one now. (call me wishy washy). It would be only. 010" in height shorter than factory. But this is on a new crate engine with a 4" bore. The 1003 has a 4.2" bore I believe. Think it will work? The dummy in me is saying that with a .010" difference in gasket thicknes, it shouldn't cause issues running the 1.6 rockers. But now the gasket bore size is my concern. Thoughts?

In follow up to my previous post. Here is a Hot Rod thread where they did exactly that. This is of course without a hot cam and 1.6 roller rockers. Although they say they use the felpro 1003, they say it had a compressed thickness of .039". But it's the 1010 that has a compressed thickness of .039". Anyhow, it seems we're halfway there:

GM Small-Block Cylinder Heads - Hot Rod Magazine