Well, my car has a new water pump, new 3 core radiator, and i have flushed it about 3 times now. I dont even have a thermostat in there. If the car idles for more than 3 mins after its warmed up, the temp jumps. The timing is about 5 degrees advanced. I have edelbrock alum. heads/intake.. so shouldnt that disipate (spelling?) heat better? Do you think my car is just running lean? Im getting kinda mad at this thing.