Static and Dynamic Displacement and HP

Hang on 273, yur confusing me.
As for compression ratios;
I thought Static compression ratio was the relationship of volume of the TOTAL cylinder volume including the chamber to just the chamber, like in a 360SBM;
(737.2 + 108)/108 =7.826
Whereas in the Dynamic , you don't start building pressure until the intake actually closes. So then if the ICA is such that intake does not close until the effective stroke is say 3.0 inches on a 360, then the dynamic is only
(618 +108)/108 =6.72

So how are you
borrowed the static and dynamic idea from CR.
I always enjoy your thinking but I gotta admit I can't always connect the dots, and this is one of those times.