k well i was looking for a compression ratio calculator for the D series and i stumbled across a site that calculates for D, B, F, H, and K, and not only does it calculate CRs, it calculates Displacement, Rod/Stroke ratio, mean piston speed, and max piston acceleration.

i thought this would make a good sticky

d-series
b-series
k-series
h/f-series

 

thats pretty accurate