I used to spend a lot of time on circle tracks in SC , NC and GA . We didn`t run a thermostat , but we did run restrictors/orifices in place of the tstat . With nothing in there , the coolant circulates too fast to get good heat transfer from the engine to the coolant ..... you have to slow it down . The only way to do that was to play with various sized holes until you found what worked .
mobdro 2022