How good is the stock spoiler?

NerdKrusher

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Dec 27, 2019
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I'm hoping someone can help me out here. I am looking to build my 96 GT convertible for drag and road racing. I would like to know how effective the stock spoiler is at generating down force for my car? For road racing I could see it possible for my car to get near 200mph. Would the stock spoiler handle this? Or be useless?
 
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stormsedge

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Jun 17, 2018
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It’s for looks...nothing more
Concur. My recommendation is to do a search for SN95s in the road racing scene and study the pictures. A quick look this AM yielded many with large adjustable spoiler surfaces...the one car retaining what looks like a stock spoiler had an additional surface added to the back of it. I recommend picking the aero rigs that interest you and make contact with the race teams through their websites/FB/whatever to ask specific questions. Happy hunting.

Or you can read articles on the internet like this: https://www.sn95forums.com/threads/may-the-downforce-be-with-you-lots-of-reading-but-worth-it.70578/ and wonder if the calculations are correct and "if" the downforce in the calculations are enough or too much for your application.
 
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BlakeusMaximus

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Jul 12, 2017
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There probably isn't any data on that. I agree with the statements, its for looks only.
 

Mustang5L5

i'm familiar with penetration
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There probably isn't any data on that.
none accessible to “regular” people at least. Youd need to find someone with a wind tunnel that decides to actually test the car with wing on and off and see what it actually does. If someone like that exists, you’d have to find them and convince them to share their data.

I did some wind tunnel testing in college and wrote a paper on it. The wing probably does do something and adds a little downforce, but you are better off looking at aftermarket wings if you really plan on getting serious
 

Warhorse Racing

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Feb 10, 2019
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You mentioned that your car is a convertible. You should find out if you are required to have the top down when you road race (most clubs/tracks have rules about convertible tops, but they can vary). Having the top up or down can impact aerodynamics and how effective a wing will be.
 

Mustang5L5

i'm familiar with penetration
Mod Dude
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Also, you really need to decide if this car is going to be. Drag car, or a road course car. It can’t do both without serious compromise. Suspension will be different, gearing will be different.
 

lemosley1973

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Feb 18, 2019
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I'm hoping someone can help me out here. I am looking to build my 96 GT convertible for drag and road racing. I would like to know how effective the stock spoiler is at generating down force for my car? For road racing I could see it possible for my car to get near 200mph. Would the stock spoiler handle this? Or be useless?
Not even if you drove it off of a cliff.

(That spoiler is for looks)
 
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