How to calculate Piston volume in ccm from the pistons below

Recessed piston head is 0.150 inch deep x 3.250 inch diameter.
http://www.summitracing.com/int/part...np30/overview/

 

It's the calculation of the volume of a cylinder. Google is your friend here.

Just use this calculator, but you will need to use the radius (diameter divided by 2):

https://www.google.com/search?q=volu...utf-8&oe=utf-8

Then convert cubic inches to cubic centimeters:
https://www.google.com/search?q=cu+i...utf-8&oe=utf-8

 

3.25x3.25x.150x12.87 will give you the cc's.

 

20.39 which very close to the factory dish. I have seen 20 and 21cc used as the factory spec, that falls right in between.

 

Thanks