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How intercoolers work?
Air to air use a radiator in front of the coolant radiator to cool the compressed air made by the compressor side of a turbo. It is cooled and therefore is more dense as it enters the intake manifold of the engine, giving it more power, and it also lowers the top end temp of the engine.
Forgot about the intercoolers incorporated into the cooling system: They use a small heater core that maintains the air temp from the coolant moving around the fins to lower the compressed air from the turbo or supercharger/blower, again making it more efficient for combustion.
