Our answer again lies with spraying water, this time over the face of the heat exchanger. It’s actually the same fluid as ADI, because the cooling properties of water and alcohol far exceed those of air. Dago Red, Strega and other Mustang racers have these spray bars - and you’ll notice a hearty trail of water vapor trailing the coolant door during a race. The air entering the scoop simply becomes a means to get the water to the face of the heat exchanger, where is flashes to steam, and carries the heat out the exit door. Most non-racers find it interesting to learn a Mustang racer goes through about 80 to 110 gallons of water during a race!