Thanks for the help guys. I will keep monitoring the temp to verify the 20 above ambient with open throttle as 50 above at idle.

 

I just had a chance to do some data logging with my Mugen intake today. The Mugen draws air from the upper section of the bumper.

Ambient air temperature was about 90 degrees F, but the asphalt road temp was about 110 degrees, hard to say what the temp of the air is about 18 inches off the ground, probably somewhere in the middle - 100 degrees F.

In steady state highway driving at 70 mph my intake temps were 110 degrees, so 20 degrees above ambient, maybe 10 degrees above road temps at 18 inches off the ground est. ?. If I went WOT for about 5 seconds or more the temps dropped quickly to 105 degrees, if I lifted throttle (closed throttle and coasted) for 5 seconds or more temps rose to 119 degrees. Once I got into slow city driving conditions temps rose up to 128 degrees, like slow driving and stopped at a stoplight. Once I got the car moving again temps would hover around 125 degrees until vehicle speed got up to 50 mph at which point they would drop to about 119 degrees. Steady state driving on a county road at 50mph temps would hover around 119 degrees, going up to 70 mph saw the air temps dropping steadily, mainly because of the throttle position. The difference between 50mph and 70 mph was all due to throttle position, not so much about air differences. The more open the throttle, the lower the intake temp readings on an Ap1.

Low throttle position in slower city driving (30 mph) saw temps 40 degrees above ambient, maybe 30 degrees above road air temp (approx.). Moderate driving speed of 50 mph with moderate throttle saw temps 30 degrees above ambient and 20 degrees above road air temp. Highway speed driving of 70 mph with increased throttle position saw temps 20 degrees above ambient, 10 degrees above road air temp (approx.). WOT - 15 degrees above ambient, and 5 degrees above road air temp (approx.).