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vtec-e:
Engines typically reject equal amounts of energy through the drivetrain, exhaust, and cooling system. This is pretty typical of the "30%" efficient internal combustion engine. That means that if you are utilizing 80 kW to maintain speed or to accelerate your vehicle, at that time you must be rejecting 80 kW of energy through cooling or your engine will heat up until you require less power.
I don't think this will work, because you will be rejecting heat to air that will then circulate through your engine. This will return a substantial portion of the heat to the engine block, plus hotter air is less dense and will greatly diminish power, not to mention the decreased volumetric efficiency created by pulling air through a heat exchanger.
More gains are to be had by utilizing advanced lightweight radiator designs, appropriate ducting, electric water pumps and fans, and you'll be less likely to blow up your engine.
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