CraigL, it gets quite toasty under the bonnet. The oil tank picks up heat and has no place to radiate it out but to the captured air under there. I was thinking that even a small passive radiator for the oil on the front end would be nice.
When I measure engine oil temps in the return line from the engine and then measure the tank oil temperature i get about a 10 degree F lower temp in the tank until i have been running on a warm day for an hour and then the tank oil and the engine oil are the same temps.
So in my case with a regulated oil cooler system i can keep the oil temps to 183F max so therefore that is the temperature being radiated under the bonnet. Louvers or a grill in the bonnet might lower the temps under there but I have no clue as to how much.
