specs are correct, but I was half in English and half in metric. Its 1.09 inch/3 that converts to 17.8619cc. 140.7g/17.8619cc=7.877 g/cc pin material. I was 1cc off in my liquid displacement test rig...(it was a 10ml graduated baby bottle filled with blue water!)
Pistons were a Chevy no-names that were given to me thinking they were 318's! I saw a huge pop up on them and thought they were something special.
for volume, I took the cylinder volume then subtracted the hole volume. there is a very slight 45 bevel on the pin end, maybe .040 if you want to further drill down on the mechanical volume of the pin, subtract a .040 X .040 X .927 diameter ring.
