Evo Rear Wing

[Lukefraizer]

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!

 

[Brunoboy]

ive seen the viii wing on our cars. check the members rides section.
-Shane

 

[GSX_TC]

the EVo 8 fits fine man, here is a VR4 with a 8 wing and a EVO 2 and 3 wing

 

[GSX_TC]

here's two more pics of an 8 wing on a Galant

 

[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.

 

[throughfaith323]

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

 

[Lukefraizer]

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....

 

[throughfaith323]

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.

 

[thecman02]

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. /ubbthreads/images/graemlins/rofl.gif

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.

 

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?

 

[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.

 

[turbowop]

There isn't even justification for installing one of these horrid wings in the name of aesthetics. The f*** are you people thinking? Those wings are as useless as tits on a boar. /ubbthreads/images/graemlins/uhh.gif

 

[SouthCaliVR4]

^^^agreed!!

 

[thecman02]

If you need a wing because your sh*t is getting lose at high speeds just go order a ginormous and tall adjustable wing. /ubbthreads/images/graemlins/smile.gif click /ubbthreads/images/graemlins/worthy.gif

 

[Lukefraizer]

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,

 

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

 

[Brutal213]

the EVo 8 fits fine man, here is a VR4 with a 8 wing and a EVO 2 and 3 wing

Hey sorry yo bug u but what hood do u have here👇

 

[Linden2413]

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!

 

[Linden2413]

Evo 8 carbon fiber wing on vr4 fits nice and can feel the difference at high speeds 110 and up

 

[Brutal213]

Cool but I was asking about the hood in the fist picture