The stock wing is designed to knock that turbulent under car air current back down. This reduces drag (very slightly) and helps the hot air from the engine box exit thru the decklid grilles for better engine cooling. The Fiero dosen't need additional downforce on the rear end. It has a cast iron engine back there.
I want a functional wing and more stability when I go over 100+mph. The perfect wing would be 10" high with about 7-10 degrees of attack.
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03:37 PM
Blacktree Member
Posts: 20770 From: Central Florida Registered: Dec 2001
IMO, if you want better high-speed stability, you need to straighten out the airflow behind the rear window. The turbulence back there gets worse the faster you go. That turbulence does not help high-speed stability.
I also think it'll take more than just a spoiler to correct the problem.
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05:29 PM
css9450 Member
Posts: 5519 From: Glen Ellyn, Illinois, USA Registered: Nov 2002
Originally posted by Blacktree: IMO, if you want better high-speed stability, you need to straighten out the airflow behind the rear window. The turbulence back there gets worse the faster you go. That turbulence does not help high-speed stability. I also think it'll take more than just a spoiler to correct the problem.
You lost me do you mean something like a roof spoiler or a whale tail style wing? You're right it will take a few other aerodynamic improvements aside from a wing.
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06:34 PM
Sep 4th, 2005
Blacktree Member
Posts: 20770 From: Central Florida Registered: Dec 2001
I mean a "barbecue grille" vent on the decklid and/or exhaust fans in the grates. You need to fill that void behind the rear window. The partial vacuum back there causes alot of the turbulence (and lift, and drag).
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05:21 PM
Raydar Member
Posts: 41053 From: Carrollton GA. Out in the... country. Registered: Oct 1999
how does a choptop effect that low pressure area? how about a fastback choptop? how would the stock wing function then? just a few questions to think about for the future.
------------------ 85 black gt-being converted to isuzu and duke 85/86 2m4-parts car to swap isuzu into gt
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12:31 AM
Jermz238 Member
Posts: 1637 From: Newark, California Registered: Jan 2006
gosh even mustang spoilers fook like fiero coppies... wounder where they got that idea...?
funny story, an old friend of mine had a 79 mustang GT fastback, spoiler delete, but he picked up a fiero spoiler from a junkyard and slapped it on, looks like its supposed to be there
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