I replaced my radiator with a 4 core desert cooler because I had cooling problems. That didn't solve it so I hunted for YEARS for the solution replacing and tweaking every component in the cooling system until I decided to replace the engine an be done with it. When that didn't solve it I accepted that it must still be the radiator so I replace the brass/copper Desert Cooler w/a Summit universal aluminum radiator. PROBLEM SOLVED!

It is not that brass/copper is a better conductor of heat, but that the larger Al tubes have more total surface area.