Right. The thermostat IS the restriction. So why is leaving the coolant in the block longer a good thing? When you answer that you’ll get it. I’ve typed it out and so have others. The less TIME the coolant spends in the block the less heat it carries to the radiator.
Even in the video you posted the dude admitted that the Delta T is about 20 degrees. If the coolant comes out of the block at 200 is that better than coming out at 180? Answer: no.
