[Dean]

I told you I needed a graphing calculator....

So based on the Charty numbers:

( 14.69 + 15.8 ) / 14.69 = 2.08:1 @ Sea Level

( 12.46 + 15.8 ) / 12.46 = 2.27:1 @ 4500 Feet

OK, and with good old pvnrt, we have less, hotter air... Even at 15.3 it is still less hotter air.

Now with less air(CFMs), shouldn't the intercooler be more efficient(or maybe that is a bad word) More able to reduce the temperature of that given volume assuming sufficient cooling of teh intercooler itself?

But with less air, slightly hotter or not, we have less pressure at or before combustion/detonation, so thus, less octane required... Or so was my understanding.