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      07-15-2016, 08:06 AM   #49
davidwarren
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Drives: 328,325, 325, 335, X5, 640 GC
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Quote:
Originally Posted by dcaron9999 View Post
Do you find that enough air gets forced through that belly pan? Im tapping my 2 inch flexible hose into the standard bumper ducts and connecting to center of my brake dust shields on my 135i. Seems to be doing the job.

On average, I need to change my flexible piping about once per season as it gets chewed up , from moving control arms, sway bar, and slight rubbing during tight turns.
Couldn't tell you for sure. But I can say that that area should get plenty of air flow, and the NACA ducts are designed to pull air flow off a flat surface. So it should work, but I have no empirical data to prove so. I am only going to run ducting when I am on the track. I originally went with your hose routing between the front control arm and the sway bar, but mine was squished from suspension movement. I have a Whiteline front sway bar and I think it has a different shape that doesn't work as well for that.
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