[pontiacphil]

Yep, I'm so anal I have now installed 3 different sets of gauges and they all read the same. Plus, you can feel the excessive heat under the hood when it gets in the 220 to 230 range. When I open the cap, and watch the coolant/water mix, it opens and starts a good flow at 185 degrees (it's a 180 thermostat). I still think it's either air flow at low RPM's or the water pump isn't pumping much at low RPM's. The Flow Kooler pump I bought through Summit says it pumps 30% more at low RPM's but I'm not sure that isn't just advertising hype. I truly thought the Rodney Red aluminum radiator would have to help some, just being aluminum, but it didn't make a degree difference over the factory 4-core Harrison. I really thought that would be my solution and was greatly disappointed when it didn't help me. I just don't know what else to do at this point. My dobber is down! I tried both the port and manifold vacuum methods and the overheating remained the same. No difference.