Maximum Compression Ratio

In my opinion 10:1 to 10.5:1 is a safe range for aluminum heads and pump gas with a conservative timing curve. I run 17 initial/35 total all in at 3500.

In regards to cams. They don't "bleed" off compression. IF you care looking for less cranking compression increase the lobe separation angle. THe duration at .050 isn't the magic bullet for detonation resistance, LSA is.