from fbbo
They did another episode on fans and how much power is lost with various fans and a rad with shroud in front. Very revealing. Clutch fan best at keeping as much power as possible. 7 blade solid steel fan the worst. Clutch fan cost 14hp and 7 blade lost about 30hp. So it's amazing how much parasitic loss there really is on an engine for a street application where you require things like power steering, alternator, crank driven fan, etc.
sorry about your new stmped fin water pump
we weld a round thin steel plate to the fins to inrease flow and avoid cavitation
if you really run up against a wll get one like that
run whatever thermostat your motor calls for
a low temp t stat does not cool an better than a high temp one
they flow the same
cold stat may not rid condensation as well and get's worse mileage
may get a little better WOT
