My Cooling Improvement Project (hopefully)

383Duster said

Guess all of the cars that run cooler after installing a restrictor when they didn't have a thermostat in them didn't go to school................

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This doesn't prove that the coolant slowed down through the radiator---it still could have been a pump cavitation problem.

So if that really cures a problem, it may actually be for "the wrong reasoning."

All this talk about "too fast through a radiator" does indeed pretty much go against conventional heat exhanger theory.