Compression Ratio , Measurement, Calculation and Modifying.

Everything you need to work out the compression ratio of you engine.
First we go over static Comp Ratio.
Dynamic Comp Ratio

[@rickybobby7660]

Dynamic compression ratio uses volume of the cylinder when the intake valve closes which you can work out with a bit of excel but again that assumes air has no mass or inertia

[@TheMotorcycleForge]

Yeah man that's a better way to put it doe sure.
Bravo

[@frog6709]

Where is the h3ad gasket? It adds to the volume of the chamber

[@TheMotorcycleForge]

My bad I should have said, It is included in the squish volume

[@Speedtek18]

i think the squish volume , and he uses clay maybe