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Need some Help figuring Comp Ht on Pistons

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Jeff Strube

New Member
Joined
Feb 11, 2004
Messages
163
We are Building Two Engines one is a 3.8 Block witch will be .010 to .020 on the Bore so 3.810 to 3.820 the other Block is a 4.1 Block .030 to .035 so
3.995 to 4.000 bore both Engines will have 3.625 Stroked Cranks and 6 inch
Rods with .927 Small Pin side both will have 46cc to 48cc heads the 3.8 will
have a .040 headgasket will 3.860 hole in the Gasket. The 4.1 will have a
.039 gasket with a 4.020 hole in the Gasket. We here that Deck is the same on both Blocks at 9.535 is that true?

No shure on the Compression Ht on the Piston and how much in the Hole we need them looking to have 8.5to1 to 8.9to1 Compression on both Engines
 
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