I've been investigating and working this issue for sometime.

All you can do with the current system - IMO and testing - is separate the IC coolant from the engine coolant to stop engine heat transfer thru the liquid - you gain about a 50 deg drop in IC coolant temp and a 15-20 deg drop in IAT.

Other then that - the system is just not efficient enough to reduce IAT's to get even close to OAT - boosting or not boosting - no matter how cold you can get the IC coolant.

Not to Hijack Waldig's tread - but I spent this morning testing dry and wet ice in my IC tank - the best I could do was come up with a recipe for the serious drag racer - and only "IF" they could get staged in hurry from engine start up.