My 318 Build with questions

nm9stheham said
Trying to work on the CR number for you but there are a number of 'standard' 318 pistons with different compression heights. Do you pistons have 4 valve reliefs on them or are the flat tops? Better yet, do you have a piston part number?

And we'll have to venture a guess on the combustion chamber volume unless you have measured it; I'm guessing 60 cc's.
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Sorry I don't have any of the pistons out and not sure I'm taken them out unless something looks bad when I get the pan off to inspect the bearings. I do however know that the pistons do have four reliefs cut in the top. Also they do not come all the way flush with the deck when rotating the motor over.

Jon