360 HP estimate???

OK, thanks, you answered the question actually. 95 RON (Research Octane Number) is like 87 over here. We use the average of RON and MON (Motor Octane Number).

And you also answered the question: combine timing and octane....as one would expect. Realize that he has notably higher DCR to start with than your motor, so it starts closer to detonation-land.

My favorite expression about N20: "Most of the problems are user error."