follow the info in the track subforum (limp mode sticky) to display the coolant temps on your dash. Or if you have a JB4, you can also remap fuel or oil gauges to display coolant temps.
As long as the track has 1-2 long straights your coolant temps will remain lower (99-107C) than spirited street driving due to increased airflow, technical courses with continuous turns will show higher coolant temps than street driving. It's all in the sticky