You also need to take into consideration the boost loss, packaging within the vehicle, interaction with other cooling systems, and convection heating of the system. This means that the relatively low mass of the heat exchanger system heats and cools almost instantly and the system relies on its effectiveness for any benefits. Because of this, the heat exchanger can be placed right in the existing path between the supercharger discharge and the engine inlet. The second heat exchanger sits in the cooling air, right ahead of the engine's radiator. This cooling loop is completely separate from the engine cooling system and continuously cools the water.
Most cars use boost intermittently and the engine is running in vacuum most of the time.
Therefore most of the time, a supercharger is generating little heat. When the engine is used under boost conditions, the heated charge air will begin to exchange heat into the water. Depending upon the system and reservoir capacity, boost level and duration of the acceleration, there may be very little impact of boost on the total system temperature. Then, the system would be dependent solely on the effectiveness of the heat exchanger radiator removing the heat. These conditions rarely occur.