Guess The Compression Ratio

I use this method for calculating static compression.

V1+V2+V3+V4 divided by the sum of V2+V3+V4

V1= bore x bore x stroke x .7854
V2= bore x bore x deck clearance x .7854
V3= bore x borex gasket thickness x .7854
V4= combustion chamber volume in ccs x .061

For you it would be;

V1= 4.06 x 4.06 x 3.58 x.7854
V1= 46.3475

V2= 4.06 x 4.06 x 0.012 x .7854
V2= 0.1554

V3= 4.06 x 4.06 x .024 x.7854
V3= 0.3107

V4= 72cc's x .061
V4= 4.392

The problem would look like this after you add it up: 51.2056/4.8581

Answer is 10.54025

This is for flat top pistons Stan, I didnt know for sure if you had 5cc dome or dish pistons so I just decieded to do it with flat tops instead, let me know and I can redo in a second for you.