Thread: cosworth 4x4 pistons with 2wd head compression ratio
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Old Mar 18, 2008 | 06:06 PM
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garyrs
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From: dorset
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Originally Posted by PGT
dont know if it helps but i reckon old valves (with low margin) will add another 4 - 5 cc and polished chamber prob another 1 or 2
didnt think of that , think i will measure it me self so i no for sure , thanks
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