All things being said Ristow is right...hmmm think about that.
if your cooling system can keep the engine cool with a thermostat,it will keep it cool without.
Personally after having spent 30 yrs involved with cooling towers and relative flow of about 6000gpm, transferring heat into the water was very easy...getting it out was another thing. Still very dependent on flowrates and dewpoint(affected a lot by humidity). Many times we did a better job through the tower(radiator) buy slowing the flow down rather than just speeding it up.
More tower cells(rows/fins) tended to manage the amount of cooling drastically. When took a tower cell down for cleaning and ran 3/4 of the system...we just plain had to limit the amount of flow...hence the idea that a bigger, better radiator does more work(heat transfer) with the same flow.
Driveshafts for all Jeeps, Constant velocity rebuilds, Replacement, Repair
Putting this back up. "Someone is gonna have to crawl under the rig"