Old Head, it is truly hard to believe. As long as there is motion, the temp stays low. When idling at a stop light, with the AC running, there is potential for a rise in the engine compartment heat; until there is again motion. The condenser, radiator and inter cooler all vent back to the engine compartment, but the ambient heat is soon cleared by the motion of the car; as far as the intake sees at the airbox.
My claim of 5 degrees difference may not be accurate where stop and go driving is involved. On the road, it seems to be fairly close.
This is a real eye-opener.
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