I ran both already and saw no measurable difference. The water path was from the I/C in to the supercooler out to the stock H/E and in to the pump. It did take a bit longer to warm during the first drive of the day but I saw the same maximum IAT temps on the road course. Ambient temperatures are in the 90's. Because of the racing and temperatures my car sees the IAT's the ECU read must be accurate or KABOOM! That's the reason I'm spraying through the supercharger. I can tell you that the supercharger stays cool to the touch.

Les