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Old 12-18-2011, 01:45 PM   #1
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Default downforce from original spoiler or wing?

were there any spoilers or wings fitted as standard, as factory option or have homologation that create downforce? in the championship i race in i am not allowed anything else. i could probably get away with something that didn't look too crazy but no point in putting something on that wont work. ideas?
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Old 12-18-2011, 07:18 PM   #2
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R-package front lip is probably worth something if you have an NA.
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Old 12-18-2011, 07:33 PM   #3
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Yea it's an Na. We already have 1 and a front splitter as that is allowed. Could just do with some rear downforce to balance things out.
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Old 12-18-2011, 07:41 PM   #4
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IIRC in order to make downforce on our cars in the rear you have to have a fairly tall rear wing, nothing OEM fits the bill. 949 racing has some examples of rear spoilers that make downforce. I guess downforce made under the car like in F1 isn't OEM either...
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Old 12-18-2011, 07:48 PM   #5
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What about a spoiler rather than a wing? Nothing in the rules saying I can't use a rear diffuser but that's a whole other subject that I am already looking into. For now I want to concentrate on the top of the car until I can develop a decent flat bottom to work with a diffuser.
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Old 12-18-2011, 11:02 PM   #6
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The issue is getting something into the air, i don' think a spoiler is tall enough to do that.
For reference, read this thread. Same question.




As you can see in the picture, anything shy of a wing doesn't get high enough to make a deference, I know its an NC in the pic, but an NA should be similar. Do you race with a hard top on? It might have some effect with a hard top on, idk though thats just speculation.
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Old 12-18-2011, 11:33 PM   #7
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If you are allowed a flat bottom and diffuser I would focus on that. You will end up with more downforce and less drag than would be possible with just a rear wing.
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Old 12-19-2011, 05:09 AM   #8
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Yea we run with a hardtop but I think your probably correct. The angles are too big to keep the air attached properly. although in that picture you can see where the air leaves the boot. i wonder if there was a hardtop fitted and a spoiler it could create a high pressure area. also i have read somewhere about putting holes in the rear hardtop window or removing it completely too help keep the air attached. Are there any examples like that with a hard top fitted?

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Old 12-19-2011, 08:14 AM   #9
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found same pic but with roof up and hardtop



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downforce from original spoiler or wing?-mk3wind1.jpg   downforce from original spoiler or wing?-mk3wind.jpg  
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Old 12-19-2011, 08:45 AM   #10
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Great pics! Interesting to see such a difference between the hardtop and softtop.
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Old 12-19-2011, 11:18 AM   #11
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looking at those pictures i think a spoiler will work with a hard top. that is assuming the flow is similar on the NA with hardtop to the NC with hardtop. wonder which would work best??

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Old 12-19-2011, 01:45 PM   #12
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If only there were another roadster that came with an airfoil like the ones 949 sells.

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Old 12-19-2011, 02:14 PM   #13
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A mammoth spoiler like the ones used in CSP might shift the aero balance somewhat. But you will sacrifice top speed.

Stable air is vital for optimal working aerofoils, flaps (e.g old generation nascar etc) and other "band-ainds" might have effect with turbulent air. Testing is knowing
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Old 12-19-2011, 02:36 PM   #14
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was hoping someone somewhere was going to tell me about a homologated wing used somewhere that i could just strap on and be on my way or at least find something that is similar.

think i will have to get a few different standard spoilers and give them a try at the track. we have a big rear wing but not allowed to use it.
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Old 12-19-2011, 02:48 PM   #15
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I'd bring this up in the other thread. I know Hustler races and a few other guys do too, they may have a better answer for you.
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Old 12-20-2011, 03:31 AM   #16
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A spoiler, unlike an airfoil, doesn't need clean stable air. I'd bet that even the stock R-package spoiler would help reduce lift and a lessen drag by a small amount.

But reducing lift is a long cry away from producing down-force..
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Old 12-20-2011, 04:33 PM   #17
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how about this? i know its not standard but i think i could get away with it.

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Old 12-20-2011, 04:41 PM   #18
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I've got one of those and it doesn't do ****

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Old 12-20-2011, 08:23 PM   #19
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You have a duck bill trunk? Great, now I have to sell my new one...
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Old 12-20-2011, 08:24 PM   #20
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I also have a couple of bowties. Sell me your car?
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