Duck bill Spoiler design theory S12 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

mr.lonelys12 · 09-08-2008, 12:10 AM

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.

thanks in advance!

Def · 09-09-2008, 07:31 PM

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 · 09-12-2008, 02:55 AM

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

09-08-2008, 12:10 AM	#1
mr.lonelys12 Zilvia Member Join Date: Apr 2006 Location: cali' Posts: 183 Trader Rating: (0) Feedback Score: 0 reviews	Duck bill Spoiler design theory S12 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. thanks in advance! __________________

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09-09-2008, 07:31 PM	#2
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	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.

09-12-2008, 02:55 AM	#3
Katsumbhong Zilvia Junkie Join Date: Aug 2006 Location: San Diego, California Age: 35 Posts: 454 Trader Rating: (2) Feedback Score: 2 reviews	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