Just trying to make a point you have flawed logic. The turbo will heat up the air a % over the inlet temp so doesn't matter (well it does somewhat) if its 100 or 0 out the turbo will heat it and the ic will drop around the same amount. As for stock TBI I deff dont think a ic should be the first upgrade, everything has to flow good one things wont do much. But I think its only logical that people that would care about the efficenfy of the stock IC already have most of the upgrade your posted (and I agree should do most of thoes before doing the IC). It does matter what size your ic is. unless your in like northern canada and its always cold then no real need, but even then colder air will be more dense.