Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???
Ceedawg,
Smarter people than all of us [ including your brother ] have proved that increasing coolant flow reduces coolant temp. Howard Stewart, founder of Stewart water pumps built his own w/pump dyno & testing rig over 30 yrs ago & tested all of this stuff. He was not the only one....
If the coolant stays in the rad 'longer,' then it also stays in the engine longer because it is a closed loop system; that would mean the coolant will now be hotter when it gets to the rad for cooling.....