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-   -   Ohhh mannnnnnn, messed up some math I think.... (https://www.miataturbo.net/general-miata-chat-9/ohhh-mannnnnnn-messed-up-some-math-i-think-59816/)

blkmkiii 08-17-2011 04:18 PM

Ohhh mannnnnnn, messed up some math I think....
 
So the factory gasket needed to be replaced aswell as the head being cut/
Cylinder head was cut .030"
To compensate for that I ordered a .075 gasket from Cometic,(stock gasket measured around .02x".... did a compression test today, 125 across the board, My questions is would .045" drop the compression that much?(this gasket was thicckkkkkkkk) Turboing it anyhow, but just wanted to make sure ;)

18psi 08-17-2011 04:37 PM

well that was stupid

vehicular 08-17-2011 04:48 PM

You didn't remove a cylindrical area from the combustion chamber, now did you? Decking the block would have netted you the correct chamber volume with a thick gasket, but the chamber isn't cylinder shaped.

rbluemx6 08-17-2011 04:55 PM

You're messing with the quench area. Running a thicker or double head gasket is usually a hack to gain lower compression.


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