Armchair theory - extreme cold air intake.

[cfeng]

if someone tells me the mass flow rate of the air, or mass flow rate of the fuel, that passes through the engine, i can tell you how much more air can be consumed by an air conditioner operating 1.5-2 kw, cooling about 4-5 kw. i can approximate what power gains may be achieved.

correction to previous post, this would not be considered a forced induction at all, since pressure does not change due to cooling.