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Home > 911 Dual Oil Cooler Project  > Air Intake

Air Intake 

Maximize cooler effectiveness

With the two coolers in place, you have a lot of cooling potential.  But they only work if you can get air into them and the fender mount position is fairly protected.   Notch the bottom side of the bumper to improve air intake.  This technique was used by the factory on 84-89 911s.

This alone is enough for most street cars.  You may also want to add a fan to one or both coolers to help in low speed traffic.

It's also a good idea to box in the area in front of the cooler at the base of the fender.  This prevents air that enters the front of the bumper from escaping out the bottom, bypassing the cooler.  

For track duty, you may also want to remove turn signals or headlights for extra air intake at the track.   You can remove the lights for maximum cooling at the track, then replace them for the ride home.

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	Notches cut in the underside of the bumper.   This allows more air to enter the coolers and makes them more effective.
	Getting air through the bumper is great, but you need to keep it from escaping beneath the coolers.  Box in the area between the cooler and bumper valence to force all the air through the cooler.
	For even more cooling at the track, cut out the back of the headlight bucket to form an air scoop.  Remove the headlights at the track.   Here shown with block off plates in place for street duty, keeping headlight back side clean.
	With both headlights and turn signals removed, this setup brings a lot of air into the dual coolers.  This is very effective even on hot track days.

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