still overheating

[JohnnyE]

So I was overheating at red lights with my stock rad and Mr.G belt driven fan and when I would start driving my car would cool off, ran great on the highway at 160*. I decided to put in a three core rad from dual electric fans and a shroud from eBay (Champion cooling systems). Now the car will run ok at the lights 190*-200* steady but overheats while on the highway or when I really give-er up to 220*. The temp is rising so fast when going up hills it just seems not normal. The fans stay on all the time once up to temp because it won't cool down enough for the 160* switch to turn off the fans. I am running 160* thermostat with hyper tech switch for 160* and an Edelbrock water pump and champion rad with fans. I'm not sure what to try next so any help would be appreciated. Thanks