Does anyone have a quantifiable (i.e. lbs-f) numbers on the benefit of the stock rear wing on an Evo IX MR?

I'd like to remove it (ugh - have to fill the holes) but if it actually provides a significant amount of benefit at highway speeds, I'll leave it alone.

The MR allegedly has zero lift with the wing in place, so presumably the wing provides *some* level of force @ speed.

 

i donk know exact numbers, but you can feel a difference at high speeds. i felt it when bracking, the back of the car feels more unstable.

 

Im sure the functionality of the wing is justified, but only at higher speeds. If this is just your DD, and you're not using the street as a real race track you'll be fine. But I wouldn't mind seeing some numbers too. Good luck finding them since most of the official info will prob have downforce with the wing.

 

I have a MR as well and I have removed the wing for Drag purposes and there is a huge difference in stablility at high speeds it's really felt especially while braking at a high speed. I've noticed now that after I pass the line at the end of the quarter the rear of the car feels alot more nervous than it did before with the wing on. I'm too not sure of the exact specs of downforces it provides but it defenetly benefits the car at higher speeds.

 

I'm wingless also I don't feel any diffrence , but then again my suspension is rock solid so they could count for something.

 

Like everyone else has stated, there's a difference when braking or even letting off the gas at high speeds. I recall seeing a video of a guy doing a top speed run. He removed the rear wing to see if it would help him reach a higher mph. Near the end of the run, he let off the accelerator and almost immediately went into a tail spin. He concluded the near accident was a direct result of removing the wing. This is one of those extreme cases though...180mph+ if I remember correctly.

Edit: Found the video here...

http://www.youtube.com/watch?v=-0oJ2wQiu2Y

You can read about what he has to say about the incident under "more info" on the right hand side.

 

in my opinion, you dont notice any difference til 120mph+. you dont realize how fast your going in these cars til you start climbing above that and even then and even wingless mine still stays squatted and very solid no matter how fast i push it. i havent pushed mine in any high speed cornering much since i went wingless but i can see the benefits depending on the speed. i know of a guy that has his stock trunk and wing as a spare for track days that he swaps on.

 

I don't doubt that the wing does provide downforce at high speeds but how much is something we don't know.

If the wing was such a significant aid for high-speed stability wouldn't the Evo RS's all have wings?


Nonetheless, the Evo was never intended to be a high-speed GT car.

David Buschur's RS is wingless; as is AMS's drag Evo and those cars are obviously capable of high speeds.

 

With stock suspension when I went wingless I thought it felt some what different at high speeds.....but now with track suspension (coilovers, wider tires, rear sway bar, endlinks, etc.) I can honestly say my wing is NOT missed at all.

 

This has been covered before.Do a search. I go on and off with the wing and I cant feel a difference except highway cruising 85mph+. Just feels a bit more squirly. If 1/4mile is your thing removing the wing reduces drag and is a plus. I think there are a few setups out there who noticed higher traps without the wing.

 

the wing doesn't do anything, but the gurney flap i heard makes a 50 kilo downforce difference

 

the wing in fact does provides downforce and stabalization. if you search you'll find the wind tunnel results about it, and about the additional downforce provided by the vortex generator. two engineering documents from mitsubishi.

 

Those drag cars have no worries driving down a quarter mile with walls breaking up crosswinds and then a chute as soon as you let off the gas. As soon as that chute opens it stabilizes the rear. So they have no need for a wing.



While i do agree street racing is stupid, i've pushed my car quite a few times to the speeds in that vid to know that the wing makes a big difference. If you're not sure just go over 140-150 and do a moderate braking excersise. The tail end will get so happy it'll make you pucker. Whether you have suspension mods or not.

 

If I remember correctly, the figure is 300lbs when going above 80 m.p.h. according to the brochure.

 

About the same time I removed my spoiler, I also switched from the Yoko Advans to a set of Kuhmo all-seasons. Talk about a WORLD of change - major downgrade in the suspension and stability department. As mentioned, without the spoiler, my Evo does feel really squirrelly when I hit the brakes after a high speed pull. Yes - I've puckered a few times already.