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So when I first drilled in my wheel skirts last year, it was metal on metal and perfectly sealed. Then I decided to put rivet nuts in place so I could take them on and off easier. The rivets stick out a bit, so there’s like a 1-3mm air gap between certain parts of the wheel skirt and the car body
Even though it’s not a perfect seal, my question is, does it matter? From quick reading, the farther back you go on the car, the thicker the boundary layer. The boundary layer should easily be thicker than whatever little air slit is between the skirts and body right? So the main air flow should just be going over the boundary layer right?
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