5.9, max safe compression?

IQ52 said

Before you go getting edgy on the compression ratio, why don't you use this calculator to see what you would gain by going from 9.6 to 10.5 compression?

Wallace Racing - Calculate New HP From Change In Compression Ratios Calculator

Click to expand...

This calculator is TERRIBLY misleading as to how overall engine performance is effected with CR, and I wish people would stop pointing to this, as they are doing a great disservice to new engine builders. This ONLY reflects the PEAK HP under certain LIMITED circumstances. It tells you NOTHING about how much added CR effects low RPM torque, widens the torque band at the low end, and improves engine efficiency.

If we did not care about this, we would also never change cam timing to make changes in peak combustion compression numbers.... etc. And we all KNOW that running too big a cam in a low SCR engine kills the low RPM torque. So why then turn around and say that CR is not important? Pure nonsense.

If CR was not important, we would all run 6:1 SCR and never worry about detonation. Let see some dyno curves from that....