Compression Ratio

Total cylinder volume (cubic inch X 16.39 + combustion chamber cc's) Divided by combustion chamber cc's.

Example
59.83ci X 16.39=980.61 + 60cc total chamber=1040.61 divdied by 60cc = 17.34:1.
 
you can google a compression ratio calculator that all you have to do is input the info it asks for
 
You have to pour it. Put the piston in the cylinder and see how many cc it takes to fill the cylinder so many thousandth down like .250 down. Or are you asking about bowl cc?
 
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If you have the part number of the piston you can look it up that way or you can pour the bowls.
 
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