I once posted about deflectors in trucks and busses:
Air deflectors on trucks/lorries.
Quote:
Originally Posted by Piwoslaw
Wysocki researched the aerodynamics of a long-distance bus. [...] He tested a deflector on the rear, used to scoop fresh air down onto the rear window to keep it clean, finding it increased drag by about 3%.
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Once the rear deflector is removed, you have two very nice mounting supports for a Kammback. I personally would do an A-B-C test, where:
A - OEM deflector,
B - No deflector,
C - Short Kammback.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread