Thin Head Gasket and Comprtession Ratio

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Ronno6

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Ron
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Perfect! I have used .043" quench with 9.005" deck/.038" gasket and 9.015" deck/.028" gasket. Have run as much as 9.4:1 compression with that quench height with no detonation, even with iron heads and small cam (204 intake duration).

Just don't assume current deck height is 9.025". More important to tell the machinist the final deck height you want rather than how much to remove.

The machine shop squared everything off the main bearing bores. In essence they will have achieved the same result.
 

Ronno6

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Joined
May 14, 2018
Posts
438
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Location
South Mississippi
First Name
Ron
Truck Year
1984
Truck Model
C10
Engine Size
355
Y u no haz pix?
For all y'all who crave pics, I offer the following:
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As you can plainly see, the #1 piston is at TDC and is exactly .028" below the deck.
Perfect!
 

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