I may be missing something but the ice example and the water cooler are different. Lets suppose it is 90 degrees and we are losing power because of poor cooling. Icing the intercooler brings it down to 32 degrees. Stock has 90 degree air going over it. The best you can hope for with water is getting it down to air temp which is 90 degrees so you can't get the same power as icing. Is it really possible to get a 15hp boost? I guess the dyno runs will tell us.