I've run with the grill on and off with no noticeable difference. I run with the air and heat off. The belly pan is in the closet. I built a lexan panel to force more air through the radiator. I run with the weatherstrip at the rear of the hood off. I reach 140 mph on the higher speed track so I'm WOT for extended periods and my IAT's and water temperatures peak at 140 mph and start to cool under braking. Does anyone know how many BTU's our radiators are rated at?

If I don't have a solution before the next track day I'll leave the transmission in drive (will run cooler that way) and I'll run with the heater on high to see if it helps. If it lowers the water temperature significantly ...........

Les