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Old 03-29-2012, 01:06 PM   #8 (permalink)
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Originally Posted by Sven7 View Post
On wagons and fastbacks a diffuser at the wrong angle can increase drag. Assuming your car is about 0.3 Cd it is possible that a badly engineered diffuser could take away those 2mpg.
Thx from this info, very useful!

This brings me a question though, if I put mini kamm, isn't that making it less like a wagon and more like a hatch back?

Diffuser would then work better at angle like what they found out with A2 modification that 2 degrees was optimal when adding those pressure things to rear of car?

I believe that making diffuser at 0 degrees would at least not harm compared to there being parachute like form of rear bumper without anything there, I guess that is common to all wagons with spare wheel under the trunk floor.

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