“DCR doesn't take into account how cylinder pressure changes across the RPM range due to VE and, therefore, is of limited or no value. It doesn't matter that DCR uses CR and IVC as inputs if the output calculated isn't of use.“


DCR= DYNAMIC compression ratio. The term dynamic TELLS you that it’s a changing value. If someone has chosen to use only one value of a constantly changing equation, the results will likely be less effective.
Throughout this thread, it appears that the mistake that people are making is they use “dynamic” as a fixed number/ point of reference.

So to me, It looks like (based on the first sentence in quotes) you assumed that dynamic is a fixed number.
Maybe that’s the whole basis of this thread???😳