Calculation of these different numbers just gives the builder more information. The build has to decide which pieces of information he finds important and needs to monitor from build to build. The green line is 7500 RPM and 0.01 clearance, the red line is 7500 RPM and 0.04 clearance while the blue line is 5000 RPM and 0.04 clearance. Just as a side note. People talk about how dynamic CR changes as an engine is running verses static CR. In your above example when the piston to head is reduced by 0.03 at 7500 RPM your static went from 12:1 to 13.24:1
