Help Me Cool Down

I don’t think the water can flow so fast that it won’t cool off because the same would hold true to the engine - it wouldn’t heat the water because it’s flowing too fast.

Both the engine and radiator are submerged in water. It’s getting hot and cooling off no matter what. Unless there is another problem.

As far as cavitation goes, Not be mean but I’m not sure you know what cavitation is and how it happens. Only happens on the suction side of pumps/props. Can’t happen at the top of the bore. That’s just steam from being super-heated. Cavitation takes “pressure drop” to happen. Enough pressure drop to reduce the absolute pressure to near zero. Only the suction side of a pump is capable of doing that when it is restricted or trying to pull too much fluid weight across the suction line. Maybe the NASCAR stuff was a little lost in translation? It is a confusing topic for sure.