This is all wrong. Most here don't understand how a cooling system works. A lot is trial and error, but some type of a restriction is needed for most systems. You have to slow down the flow so it stays in the radiator long enough to dissipate the heat. If it just flows threw it cant pull the heat out of the water. if the fans and water are efficient for the application then the radiator is not pulling enough heat out and you would need a more efficient core. I am not a big fan of electric water pumps and fans for for street use. I find that a good belt driven pump and clutch fan shroud and good rad is all that is needed for street.
so, why when a car starts to run hot, does revving the engine( speeding up coolant flow) help to bring the temp down, vs letting it idle( slowing down the coolant flow)?
