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356RS 356RS is online now
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Join Date: May 2003
Location: Bend, Oregon
Posts: 2,334
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I removed the .50mm and .25mm cylinder base shims and installed a 1.00mm shim and did the math again. I now get a TDC dome height of .879".
So .670" + .879" - 1.498" = .051" in CM = .12954 cm. 1.29mm deck height.
Bore x bore x .12954 x .7854 = 10.174 cc (V2)

518.364 + 10.174 + 89.9 - 46.76 = 571.678
over 10.174 + 89.9 - 46.76 = 53.314
Equals 10.72:1 compression ratio.

That's more like it. I could get the deck height down by removing some piston dome volume and go less that 1.00mm cylinder shim but I think this will be fine.
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Mark Jung
Bend, OR
MFI Werks.com
Old 08-02-2015, 12:36 PM
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