Originally Posted by
ala_xfire
Pretty much true, as the air is gonna be hot with a supercharger or turbocharger anyway, so the temperature of the supply air is of little factor.
However, all I have read points to little overall gain on a NA engine.
I would disagree about that. Either NA or supercharged will benefit from a reduction in intake temps. Lower temps equal more dense air, equals more power. I can not tell you how much gain for each drop of 10 degrees, maybe Rob can. This is governed by the laws of physics but applies to all internal combustion engines.