to be or not to be? a thermostat question

The belt drive only turn the water pump at about a 1000 rpm so they don't flow a lot of water.
The advantage is that they can flow water with out the eng running.

With that said, i put the fastest spinning pulley on it and couldn't keep it keep cool, with my 340 9.5 compression.

My 408 how, never has a problem with heat, and it a 12.75 compression eng. Complete seal of electric fans to radiator. No t- stat and a alum plate welded into the timing chain cover to bring the water pump impeller to with in .040" of the cover.
IF this hadn't of worked, i would have went back to the factory clutch fan set up.

I ended up putting a "thermostat control" on the water pump so that it didn't get to cold on the street on cool days. And so i would quit running the battery dead, at the track because i forgot to turn it off:violent1: