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Author Topic:   Head gasket thickness?
posted February 03, 2004 02:25 PM
I was wanting to figure roughly what my compression ratio would be, but I really don't know what thickness most 350 Chevy head gaskets are.

Any idea?

Is there a particular one someone uses that is thinner or stronger than others?

posted February 03, 2004 02:30 PM
I think that most of the composites normally used are .038. I use a shim on my 350 that's .017, that makes up for the work the machinist didn't do! I believe you want about .040 in the quench area between the top of the piston and the bottom of the cylinder head.

dan ferry
posted February 03, 2004 05:29 PM
eljojo can u explain this a little better im interested inthe quench area but its not adding up. im probably having brain fart. if you zero deck a block and run a victor reinz gasket i think they were .025 cant remember with flat tops im not gonna have the .040" ??? if not is it better to loose the little compression and shimup to get the .040" i dont know im wacked out or something how does a dome piston with 0 dcck get it maybe im misunderstanding were the.040" is measured. thanks for any input this maybe something i overl;ooked

posted February 03, 2004 06:27 PM
you can run around .030-.035 fairly safe when turning under say 7500-8000rpm. And some machine shops zero deck (is .005 in the hole) plus a .039 gskt. That is a waist of valuable comp in my eyes. the distance is measured from the Flat face of the piston to the flat surface of the head. Hope this helps

Josh K.

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