Hemi dynamic compression est.

I dont have time to access my engine build notes. What would be a ballpark estimated dynamic compression ratio of a 4.15 stroke 472 hemi, with je 98cc pistons and 170cc heads . intake closed 60 abdc . If i remember static was 11.1 . Thanks.

Here are two online calculators you can try, but don't be surprised if the results vary significantly because of the difference in how they define the IVC point

http://www.wallaceracing.com/dynamic-cr.php

https://uempistons.com/p-27-compression-ratio-calculator

Sounds about right. Mine is close to that but in a 528 Hemi.

60 ABDC predicts 9.08:1 DCR and 244 psi CCP

Thanks for the info ! Saved me some time .