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Head Gasket diameter.

   
Old Nov 3, 2016 | 07:18 AM
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Default Head Gasket diameter.
I'm looking for the inside diameter of Cometic head gasket for a 4.060" bore to get an accurate ccp from the Big Boyz calculator. Anynoe know? I saw a value of 4.090" on another forum but not sure if that is accurate.
 
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Old Nov 3, 2016 | 08:44 AM
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Originally Posted by drhooligan
I'm looking for the inside diameter of Cometic head gasket for a 4.060" bore to get an accurate ccp from the Big Boyz calculator. Anynoe know? I saw a value of 4.090" on another forum but not sure if that is accurate.
IMHO, splitting hairs and the difference in CCP will be .5psi. Considering that the difference in gasket bore for a 3.750 cylinder and is .100" and the difference in gasket bore for a 3.875 cylinder is .035", I would guess that the 4.090" dimension is about right. However, like I said, the difference won't change CCP enough to make a difference; a waste of time IMHO........
 
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Old Nov 11, 2016 | 05:47 AM
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Yes, the gasket diameter is at/very near 4.090".
Very little, if any ccp change in real life, or an on-line calculator.
Scott
 
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