Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???

I ran a large brass radiator out of a late 50's pickup truck in my 75 Nova dirt track car for 3 seasons (until it got destroyed) and I never had any overheating problems. I would see cars with aluminum radiators dropping out of races or destroying engines from overheating. It held "a lot" of water.