Gotcha. I haven't tracked IAT1 yet. I'll take a look and compare it to Coolant Temp and IAT2.This is what I was referring to. With temps at 100, my IAT1 would be 125+ while driving. CAC would be about 5 above that if the shutters are plugged in and IAT2 would be 140+ at least. If I unplug the shutters and leave them open, my CAC temp can drop 5-10 degrees below IAT1.