I run Air to water on my Merkur, its a great setup. My intercooler sits right over my turbo so yeah it gets hot and i can tell when it gets heat soaked. But i dont run the pump all the time and the only way it gets hot is if im in traffic. I hit the switch for the pump and in about 5-10 mins its back down in temp and the car is pulling strong again. Just make sure air gets to your heat exchanger and you should be good to go. If you want to check out my setup i live in npr and just drop me a pm i can give you my number.