[Stan Weiss]

Lets look at Dynamic Compression Ratio a little closer. It is based on engine parameters and IVC. So unless you have done something to have these change once the engine is running it is really now static. People look at Cranking Compression PSI and running cylinder pressure and say see see the DCR has changed. No what has changed is the engines VE / mass air flow. There have been OEM manufactures that actually call this trapped CR and listed it as an engine spec.

Stan