I want to know how much downforce the wing of my 89 GTA would give me at speeds 75mph and higher??? just curious if people have stats.

Thanks in advance

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1989 Trans Am GTA, L98 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27,
- K&N Air Filter
- Dynomax muffler

1992 Camaro RS, LO3 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel - Sold
- K&N Air Filter

Honda engines ROCK, I have one on my lawn mower but I still have to push it.

 

i don't know but have you ever seen that gta that goes 300 mph? it still has the stock wing on it.

 

I can't really say without airfoil data and I haven't gotten a good look at the later spoilers, but the wing on my '84 firebird is probably similar in function... now the spoiler is about 54" long, 4" wide... in my experience with radio controlled planes, I would say that a "standard" wing of this size will be able to carry about 10 lbs at high speed (60 MPH). Now you have to consider that the faster you go the more downforce you will get... this downforce is inversely proportional to the lift since it is the same as an upside down wing of that size. So, I would say at 75 you're getting about 15 lbs, 100 about 25 lbs and 125 MPH about 40 lbs... the actual airfoil being used is going to predict just how much the downforce changes per mile per hour... I'm sure that the stock spoiler provides enough force at just about any speed...

 

I would say that since it was designed for visual impact, that it's effects are minimal, though I have absolutely no data to support this. . Lowering your car or putting a deeper skirt on the front will give you much more downforce at high speeds than the spoiler will.

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The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah

 

Dont forget that the spoiler makes downforce just by its own weight. Technically, my subwoofer box is functional. It weights a good 50 lbs with the subs in it, so it makes 50 lbs of downforce. No aerodynamic drag, either...

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1983 Firebird
TH700R4 Auto
Small Block 400
LG4 ECM, Intake, Carb, Distributor, etc.
Soon to be non-computer.
Clarion Head Unit 45X4
2 Pioneer 400W 12" Subs
Third Gen Performance
"A four cylinder is half an engine."
"Ponies can run, but birds can fly..."

 

Well, at least on my car I know it does something... I have looked it over and it has an airfoil just as a plane would. The benefit of a spoiler is it provides more downforce the faster you go... but in the winter it is a good idea to carry 50 lbs or so in the back to help with traction... like a sandbag or something.