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1275 Cyl Head volume question

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J

Jeff_Sigrist

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I just picked up my 1275 from the machine shop. It had to be bored .040 over. The crank was ground .010 under by the PO on both rods and mains and still in spec, so it was just polished. The head was milled because it was warped and it received a three angle valve job. I also had the crank and piston/rods balanced. The cam is being replaced with a stock grind. What is the acceptable variance between combustion chamber volumes? Mine are between 21.5 and 22 cc's.

Thanks,
Jeff
 
B

Bugeye58

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Jeff, if your question is whether a 0.5cc variance in combustion chamber volune is acceptable, the answer is yes, for a street engine.
Jeff
 
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J

Jeff_Sigrist

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That is exactly my question.

I did not want to spend the money to have the mechanical masses balanced and then have it upset by too much variance in the CR.

Thanks,

Jeff
 
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