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Evo Rear Wing


Lukefraizer
Member


Galant VR-4 org Post #: 1030938 posted 11/03/11 06:51 PM     Remind Me!  Send Private Message   Edit Post      
I have looked for a couple hours now and I cant find anywhere where the specs of an Evo 3 vs an Evo 8 wing are. I know the 3 will fit but I'm not sure if the 8 will as well as what kind of numbers in downforce they produce? That may be too much to ask but I would really like to know. If no one knows I may just have to do some tests!



619/1000 getting there..... ish.......

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Brunoboy
Jesus Clips
352/1000
556/1000


Galant VR-4 org Post #: 1030944 posted 11/03/11 07:08 PM     Remind Me!  Send Private Message   Edit Post      
ive seen the viii wing on our cars. check the members rides section.
-Shane



556/1000 KG 8/10/13 .... Sold
352/1000 Summit White sold in 2011 and was totaled by new owner......
92 Eclipse Gsx R.I.P
96 Eclipse Gsx Sold

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GSX_TC
295hp 35r BR4
550/2000


Galant VR-4 org Post #: 1030945 posted 11/03/11 07:10 PM     Remind Me!  Send Private Message   Edit Post      
the EVo 8 fits fine man, here is a VR4 with a 8 wing and a EVO 2 and 3 wing















2001 R34 Nissan Skyline “Eleanor”
JZX90 Toyota Mark II Tourer V "Laura"
90 Nissan Skyline GTR "Tanya"
90 Eclipse GST "Kerri"
91 Galant VR4 "Samara"

Posts: 3705 | From: Houston, Texas | Member Since: 04/07/11 | IP: (24.249.34.170) | Report this post to a Moderator

GSX_TC
295hp 35r BR4
550/2000


Galant VR-4 org Post #: 1030946 posted 11/03/11 07:13 PM     Remind Me!  Send Private Message   Edit Post      
here's two more pics of an 8 wing on a Galant






2001 R34 Nissan Skyline “Eleanor”
JZX90 Toyota Mark II Tourer V "Laura"
90 Nissan Skyline GTR "Tanya"
90 Eclipse GST "Kerri"
91 Galant VR4 "Samara"

Posts: 3705 | From: Houston, Texas | Member Since: 04/07/11 | IP: (24.249.34.170) | Report this post to a Moderator

throughfaith323
39, 40, 41
1922/2000


Galant VR-4 org Post #: 1030954 posted 11/03/11 07:38 PM     Remind Me!  Send Private Message   Edit Post      
these spoilers are not that functional until significantly higher speeds; 60mph or greater; I'd venture to say maybe even 80mph or greater (didn't run through the calculations so I cannot say for sure.

Anyway lift force increases as velocity squared (V^2). That being said, The force of lift seen by the added spoiler increases exponentially with speed. As you go faster and faster your lift gets greater and greater, faster and faster with every increase in mph.

I really wish I had some real data to back this up, but if you want, maybe someone here can draw the shape of the evo wing's airfoil and we can find an airfoil online that is a close representation of it to get the lift coefficient of it. Then we can get the angle of attack and plot some points to have some graphical representation of these wings.



1991 GVR4 1922/2000--selling performance parts


Edited by throughfaith323 (11/03/11 07:42 PM)

Posts: 528 | From: Forked River, NJ | Member Since: 09/24/08 | IP: (68.46.96.141) | Report this post to a Moderator

throughfaith323
39, 40, 41
1922/2000


Galant VR-4 org Post #: 1030956 posted 11/03/11 07:46 PM     Remind Me!  Send Private Message   Edit Post      
No clue if we'll find what we are looking for here, nor will it be easy to find it here, but worth a shot if someone really wants to figure this out.

click



1991 GVR4 1922/2000--selling performance parts

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Lukefraizer
Member


Galant VR-4 org Post #: 1030959 posted 11/03/11 07:53 PM     Remind Me!  Send Private Message   Edit Post      
Quoting throughfaith323:

these spoilers are not that functional until significantly higher speeds; 60mph or greater; I'd venture to say maybe even 80mph or greater (didn't run through the calculations so I cannot say for sure.

Anyway lift force increases as velocity squared (V^2). That being said, The force of lift seen by the added spoiler increases exponentially with speed. As you go faster and faster your lift gets greater and greater, faster and faster with every increase in mph.

I really wish I had some real data to back this up, but if you want, maybe someone here can draw the shape of the evo wing's airfoil and we can find an airfoil online that is a close representation of it to get the lift coefficient of it. Then we can get the angle of attack and plot some points to have some graphical representation of these wings.




That is exactly what I wanted to know! I may just go pick one up and test it compared to the evo 3 wing that my buddie has, I'll try and keep this post alive and than compare it to the stock wing! Its worth a go at least....



619/1000 getting there..... ish.......

Posts: 157 | From: Fort Collins CO | Member Since: 01/03/11 | IP: (76.120.120.4) | Report this post to a Moderator

throughfaith323
39, 40, 41
1922/2000


Galant VR-4 org Post #: 1030970 posted 11/03/11 08:14 PM     Remind Me!  Send Private Message   Edit Post      
What do you mean by test it? Install it and go for a drive? If so, how will you measure its output? Sure you may be able to feel the added downforce when comparing no wing to wing (at really high speeds) but I don't think you will be able to compare 2 different wings with much success.

What are your goals as far as racing and your vr4? If you are going for:
-looks (and like the way these look) and slight functionality....I would just pick the one I like best.
-If you are going for the best performance/appearance....then its worth running through the calculations.



1991 GVR4 1922/2000--selling performance parts

Posts: 528 | From: Forked River, NJ | Member Since: 09/24/08 | IP: (68.46.96.141) | Report this post to a Moderator

thecman02
too lazy to look
580/1000


Galant VR-4 org Post #: 1031360 posted 11/05/11 02:10 AM     Remind Me!  Send Private Message   Edit Post      
For testing. You can get a track day or some other closed place where you can get to the speeds you will be racing at. Stick the wing on and measure the sag of the rear of the car compared to the sag stationary. Multiply the displacement times the spring constant of your rear springs. That will give you a KN/or lbf of force. To measure the displacement you'll have to have someone get a picture of your car at speed from the side. There might be another clever way of seeing how much the rear of your car is sagging but I'm too drunk to think of anything clever.

edit.... take a picture at speed without a wing for reference. Then bolt on one.

I think on the evo 9 with the wing and vortex generators at 120 was 300ish lbf? I don't remember for sure though because it was in a magazine article a long time ago.



580/1000
2013 Max Effort Winner
-Chris

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Zenith
Unregistered


Galant VR-4 org Post #: 1031383 posted 11/05/11 04:38 AM     Remind Me!  Send Private Message   Edit Post      
If you are primarily interested in these numbers for purposes of faster lap times, why don't you get lap times with each wing on and compare them?

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SouthCaliVR4
Gas Analyzer
825/2000


Galant VR-4 org Post #: 1031440 posted 11/05/11 05:24 PM     Remind Me!  Send Private Message   Edit Post      
There is only one way to do this with any accuracy, mount pressure sensors. Honestly given the lack of aerodynamics on the vr4 pick any wing you want, it'll make no difference in "down-force". even the evo8 wing is going to sit too low & be in a turbulent air zone.

Sorry but there is no real justification for putting one of these on but aesthetics.



How do you make a small fortune racing? Start with a very large one!!!

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turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 1031442 posted 11/05/11 05:29 PM     Remind Me!  Send Private Message   Edit Post      
There isn't even justification for installing one of these horrid wings in the name of aesthetics. The fuck are you people thinking? Those wings are as useless as tits on a boar.



-Mark

A face only a grocery shopper could love.
1051

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SouthCaliVR4
Gas Analyzer
825/2000


Galant VR-4 org Post #: 1031447 posted 11/05/11 05:55 PM     Remind Me!  Send Private Message   Edit Post      
^^^agreed!!



How do you make a small fortune racing? Start with a very large one!!!

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thecman02
too lazy to look
580/1000


Galant VR-4 org Post #: 1031573 posted 11/06/11 12:37 AM     Remind Me!  Send Private Message   Edit Post      
If you need a wing because your shit is getting lose at high speeds just go order a ginormous and tall adjustable wing. click



580/1000
2013 Max Effort Winner
-Chris

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Lukefraizer
Member


Galant VR-4 org Post #: 1031638 posted 11/06/11 11:58 AM     Remind Me!  Send Private Message   Edit Post      
Quoting SouthCaliVR4:

There is only one way to do this with any accuracy, mount pressure sensors. Honestly given the lack of aerodynamics on the vr4 pick any wing you want, it'll make no difference in "down-force". even the evo8 wing is going to sit too low & be in a turbulent air zone.

Sorry but there is no real justification for putting one of these on but aesthetics.




Where can I find said pressure sensors. I was planning on testing the wings by themselves off the car in a wind tunnel type situation. Since I dont have an actual wind tunnel I have been making one that would fit the wings in it. Also there are calculations with drag and other things of that sort that will give you actual down force in numbers. I am not really worried what it looks like to tell you the truth but it does matter how it performs,



619/1000 getting there..... ish.......

Posts: 157 | From: Fort Collins CO | Member Since: 01/03/11 | IP: (24.54.160.59) | Report this post to a Moderator

spoolinturbo
Unregistered


Galant VR-4 org Post #: 1031914 posted 11/07/11 03:46 PM     Remind Me!  Send Private Message   Edit Post   
downforce is subject to many variables, with huge differences as a result of those variables. temperature, drag coefficient, humidity, air density, wind speed and direction. The evo 8 spoiler is well within the thresh-hold to develop a noticeable difference in downforce due to its high profile and wing depth. Creating a decent pressure differential

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