In all of our Corvette road race cars we took out the thermostat, ripped the guts out, put back the stripped piece as a restrictor, took off the fan, removed the fan shroud and ran about 210F for hours. Never had a problem with any of them in any outside temperature. Nothing to open and close to "regulate" temperature. Also ran an oil cooler and baffled oversize oil pan. Finished every race and usually first or second in class. (A Production 575HP L88 12.5 - 1 compression 427 CID openchamber) Won 2 SCCA Regional Championships. Maybe I don't know what I am talking about. Who knows. Until then we must agree to disagree. By the way, I am NOT wrong, and neither are you. We just disagree.