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Is this true? I was reading an auction on E-bay that said this guy installed a new steel head gasket from felpro and it increased his compression from 8:1 to 9:1.

Just wondering if this is for real? It doesn't sound like it is to me, But I don't know everything about cars and it just sounds crazy to me. But it would be sweet if it is.

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Tony
<UL TYPE=SQUARE>
<LI>1979 Z-28, 350- Edelbrock Performer RPM Package- TH350
<LI>1970 Cadillac Hearse - 472 BB automatic 375hp
<LI>2000 Gmc Sonoma - 5-speed 4.10 rear
[/list]
 

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A head gasket can change the compression of an engine. A std 350ci gasket is .041" thick when the head is torqued in place. It has a bore of 4.166". In my 4.030" bore SBC with KB pistons, it was 9.7:1 compression with the std gasket. Because the piston was .020" in the hole I switched to a .020" thick gasket which changed the compression to 10.1:1.

That's only 4 tenths of a point. To raise it one point you would need to loose .050" in gasket thickness. Remember std gaskets are .041" Do the math...

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...Dennis
"The '69, the '96 & the club"
 

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The production steel-shim head gaskets are .018"-.019" thick, but are designed for use only on freshly-machined flat surfaces; most of the composition gaskets are .039"-.040" thick, although Fel-Pro makes a set now specifically to help reduce compression that are .050" thick.

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JohnZ
'69 Z28 Fathom Green
 
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