Sunday, 20 April 2014

Compression Ratio

I know the head has been skimmed, so I measured the combustion chamber volume with a graduated syringe. It measures 38 cc. Adding 6.63 cc for a head gasket nominally 2 mm thick, gives me a combustion chamber volume of 44.63 cc, and a compression ratio of 6.58:1, quite an increase on the 6:1 stock figure.

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