Ok I think I have all of my cooling figured out. But how do I controll all the fans automaticaly. Lots of questions. #1 recomendation for fan controller automatic controls with avaliability to controll aprox 6 fans based upon temperature sensors. #2 I am using an ac water pump That I would also like to control speed of the motor this one might be tough or possibly just turn off or on the pump based upon temperature as I will have quite a large capacity of coolant that should take a while to heat up pump has no check valve so natural convection should occur by the way what is an aproximate temperature of the coolant in a system ? Thank you for your ideas and input