Post Info TOPIC: Rear Wing?


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Rear Wing?


Hi guys,

It might be a stupid question, but does anyone run a rear wing? My buggy starts getting very loose in the rear end at 140km/hr+. I was thinking that a wing may help with this, or could it be to do with suspension setup? my rear is reasonably stiff, but feels pretty goood so I would rather not change it.

 



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Forum Junkie

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There are one or two running wings in NZ. However I have no doubt it's either a patch for poorly performing suspension or it's not functioning at all.
I've been clocked in my Jimco at 220kph using radar and 247kph using my Aim datalogger (gps). Not a whisper of instability and I'd hardly call my car "aerodynamic". It certainly doesn't like to jump at that speed but I doubt a wing placed in what is predominantly dirty air would do anything but slightly weigh down the rear.
I've never run a wing, never will. You'll probably be more successful unlatching the roof and letting it lift naturally (every one I've ever seen creates lift!, including mine)

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Powerhouse Poster

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Have you checked your rear alignment ? Toe out will make it feel loose the faster you go.



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Forum Addict

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there was a buggy in WA a few years ago which had aerofoil shaped side-pods with end plates, (basically 1 foot wide wings on the sides). I havent seen it about for years so I guess it wasn't worth the drag.
Bear in mind a useful offroad spring rate with an effective wing at high speed will compress the rear suspension a lot, this would cause a nose-up pitch and you'd be trying to compress a big wedge of air between the belly plate and the ground. I think it would be counter productive but I'm far from any sort of expert.

If the guys with a 7 figure budget aren't doing it then it's probably not worth doing, then again the fairing on the leading edge of a modern Jimco roof looks interesting.

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Regular Poster

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I'll check my rear allignment. I wouldn't be suprised if it is setup wrong. Should I run slight toe-in?

I have also noticed that my rear suspension is almost sitting on the lower rear bump stops. I might have to get softer springs and lower the ride height a bit. My rear end does feel pretty stiff compared to my old buggy

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Powerhouse Poster

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zero toe  is ideal at the rear, but buggy's have long arms on bushes that all move around, so slight toe-in is a good way to make sure you avoid any toe-out.



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Forum Junkie

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Although I run zero toe on my Jimco. However I've heard of high powered offroaders running a little toe out. When power is applied the rear tyres are attempting to drive the car forward and naturally pull the rear arms into a 0 toe (or slightly toe in) position.
I've also been on the other end of the scale where the car was constructed up with 0 toe, run it on an alignment machine a season later and found 5 degrees toe out. Didn't believe it as I couldn't see where on earth anything had shifted/bent and found it horrible to drive. The rear end would step out every time I breathed in the direction of the throttle.

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Regular Poster

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It turns out i'm running slight toe out. Ill set it with a very slight toe-in and see what difference it makes. I'm also looking at getting softer springs as the car was setup for a heavy V6 but now has a 4age

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