Well last week I opened up the radiator support and put a large radiator. Car stayed very cool. Installed the udp today and now its back to running hot. I doubt this is a cooling fan issue but I do have a taurus fan going in next as soon as I can find a big enough relay. I guess my question is do I need to run a high flow water pump with udp? I can see that the water is not moving real fast through the radiator.