Duck bill Spoiler design theory S12

[mr.lonelys12]

hey guys i need some technical help on this project. im mocking up a rear spoiler for my 200. i was hoping someone would have some help full insight on what degree and angles would be best for all round low/high speed down force.
this is what i have come up with so far based of old camaro's, Z's and the rocket bunny s13.

http://i37.tinypic.com/1j0m68.jpg
http://i36.tinypic.com/3127n89.jpg
http://i35.tinypic.com/29ncg0x.jpg
http://i37.tinypic.com/2mzb4p.jpg
http://i36.tinypic.com/k4bits.jpg

thanks in advance!:bigok:

[Def]

The flow is separated there, so no big difference in angle as long as you're in the 45 deg area. The height is MUCH more important on a spoiler.

BTW, wings are much more efficient than a spoiler from a lift/drag perspective.

[Katsumbhong]

You'll have to worry about how the air flows and reaches the backside of the car to get to the spoiler in a relatively uniform fashion.

Check out this page for information about it: http://autospeed.com/cms/A_3061/article.html