Still having cooling issues. I changed my cap to a 'Standt" one with the lever on it. Change my water pump pulley to a smaller one(i was running a HUGE underdrive water pump pulley), and put 2 bottles of water wetter in there. Nothing has changed. On the freeway it still goes to 210+ and works its way warmer, and around town ideling around traffic its still cooler(around 200). Today when i got home(car read 215 degrees) I got a bunch of rags and took the cap off. Then i started it with the cap off and lots of fluid started pouring out, then i waited till nothing poured out and started adding more coolant in. Started the car up and all of a sudden the temp went down to 190 while adding more water in. I dont know what the hell the deal is but its really starting to piss me off/concern me. Radiator tube is hard when its at 210, and the fill line on the overflow tank hasnt really moved all that much. Why does my car run warm on the freeway? And why did my temp go down to 190 when i took the cap off and started it? Any other suggestions? I know it doesnt help having 500rwhp, but i dont even push it that often.