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304065 304065 is offline
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Paolo, according to my calculations 92mm on a 70.4mm crank gives you 2808 cc (a 2,8), with 19,7 cc dome volume, you end up at 9,5:1, assuming a 68cc combustion chamber.

I think what you are reading from the other thread is using 906 pistons intended for a 2,0 liter twin plug engine with later 2,7 heads with modification to the cylinder to make them work. Going from a 72cc combustion chamber to a 68cc chamber achieves the increase in compression you describe.

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Old 06-11-2008, 10:16 AM
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