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Old 01-10-2013, 06:40 PM
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OK, we have the following values.....
679.3 cc's in the cylinder
4.2 cc's in the piston deck height
8.7 cc's in the gasket
0 cc's in the piston crown (we sliced off the pop-up and put it in the chamber)
65.5 cc's in the chamber
Total 757.7
Divide by 78.4 and find 9.66:1 SCR

On the KB calculator (only one I have used for years).....
compression ratio 9.66
stroke 3.250
rod length 6.250
intake closing point 36 + 15 =51.000
DCR = 8.398:1

Looks like a good build to me, except the squish at 0.059". I would have either cut the decks or used a thinner gasket to get closer to 0.040".
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