Fourtitude.com - B7 Passat aerodynamics low/high pressure air management
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    1. Member
      Join Date
      Oct 24th, 2014
      Location
      Minneapolis, MN
      Posts
      743
      Cars
      2012 VW Passat SE 2.5 5-speed
      08-26-2018 08:06 PM #1
      I was under my car yesterday and noticed something I never saw before on my car. In front of both front wheels are "NACA" ducts molded into the bottom pan. There's a plug (removable) on the drivers side but, the one on the passenger side was missing. Now, the bottom of the car is fairly flat. Except the central exhaust tunnel. That helps to keep air turbulence to a minimum. Creating a smoother slip stream to promote less drag. I'm wondering if the ducts I mentioned were meant to raise the air pressure in the wheel wells? Or if there was some other purpose for them? Brake cooling?? There was a reason for them. Otherwise they would not exist. Does anyone in here know the true reason for them? The Cd of the car is .29. I'm thinking of adding some more plating underneath to possibly lower that number. As well as lowering the car.

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    3. Member
      Join Date
      Oct 24th, 2014
      Location
      Minneapolis, MN
      Posts
      743
      Cars
      2012 VW Passat SE 2.5 5-speed
      08-29-2018 11:03 PM #2
      Anyone?

    4. Junior Member
      Join Date
      Dec 30th, 2011
      Location
      Omaha, NE
      Posts
      42
      Cars
      2018 VW Passat R-Line
      11-13-2018 11:05 PM #3
      I had the same question, my 2018 R-Line has the plugs in and I was like what the hell for? So I took mine out, any extra air to the brakes lessens the change of frying my rotors which were easily fried in my 2015 Passat. Anyway I found a note in the service manual I got from ErWin that says only V6 models come with the ducts open. Makes no sense to me, my GTI had them open, my 2015 Passat Wolfsburg Editon but this one was blocked off. Out they came.

      Found the vague information on it. I wish the service manual was more informative... most of what I read I end up saying to myself “ok but why?” Ha




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