Quote:
Originally Posted by GreenTDI
I recently discovered that the brakes are mainly cooled by a guided airflow underneath the car. But that air has to leave the wheel somewhere. Now the wheels are closed with tape, so the airflow seems disrupted and has to go back in the wheel well and find another way out. See the picture below. It's difficult to test this.
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Yes. That will be hard to test. You could try tufting, or perhaps the magnehelic gauge technique Julian has been promoting. Or just take your preference. My bet would be that either will be better than stock for total drag. I am sure you do much less aggressively braking than the designers assumed would be commonplace.