Driver's side rear wheel deflecting

TRAKULA · 08-31-2015, 12:31 PM

Howdy y'all!

I've got a question perhaps one of y'all can answer.

Any idea what would cause the driver's side rear wheel to deflect outward (top of wheel away from car)?

Car has newly installed Ohlins coilovers, M3 subframe bushings and control arms with Swift springs. Car was also corner balanced and aligned with -0.5 degree camber in rear. Wheels are 18" x 8.5" with 245/35 tires, so I don't think it is a matter of too large a wheel and tire combination. Also, ride height is stock and passenger wheel does not rub. Again, it only happens during mildly aggressive turning. I've had two BMW shops look at it and they say everything is tight and looks good.

Could this be bad bushing or sway bar issue? I think this might have been going on prior to the suspension upgrade (car had wider tires and wheels, so I thought it was that), so I'm not one to blame the new suspension components.

Thanks!!!

ShocknAwe · 09-01-2015, 06:38 PM

Quote:

Originally Posted by TRAKULA

Howdy y'all!

I've got a question perhaps one of y'all can answer.

Any idea what would cause the driver's side rear wheel to deflect outward (top of wheel away from car)?

Car has newly installed Ohlins coilovers, M3 subframe bushings and control arms with Swift springs. Car was also corner balanced and aligned with -0.5 degree camber in rear. Wheels are 18" x 8.5" with 245/35 tires, so I don't think it is a matter of too large a wheel and tire combination. Also, ride height is stock and passenger wheel does not rub. Again, it only happens during mildly aggressive turning. I've had two BMW shops look at it and they say everything is tight and looks good.

Could this be bad bushing or sway bar issue? I think this might have been going on prior to the suspension upgrade (car had wider tires and wheels, so I thought it was that), so I'm not one to blame the new suspension components.

Thanks!!!

Why so little camber in the rear? recommended setting is -1.8 degrees. Also, how do you know it's doing this? Have you recorded a video?

chris82 · 09-02-2015, 10:32 AM

Can you post a pic? I'm not sure I get what you're saying . . .

HP Autosport · 09-06-2015, 10:15 PM

What do you mean by deflect? As the suspension is in a compression, rebound or side forces applied?

You should have a lot more camber than -0.5 in the rear to start with. Where is your toe? The rear suspension should gain negative camber as it compresses and add toe in at the same time.

HP Autosport · 09-06-2015, 10:16 PM

What do you mean by deflect? As the suspension is in a compression, rebound or side forces applied?

You should have a lot more camber than -0.5 in the rear to start with. Where is your toe? The rear suspension should gain negative camber as it compresses and add toe in at the same time.

08-31-2015, 12:31 PM	#1
TRAKULA New Member 3 Rep 28 Posts Drives: '12 135i '09 Viper ACR Join Date: Dec 2012 Location: Texas iTrader: (1)	Driver's side rear wheel deflecting Howdy y'all! I've got a question perhaps one of y'all can answer. Any idea what would cause the driver's side rear wheel to deflect outward (top of wheel away from car)? Car has newly installed Ohlins coilovers, M3 subframe bushings and control arms with Swift springs. Car was also corner balanced and aligned with -0.5 degree camber in rear. Wheels are 18" x 8.5" with 245/35 tires, so I don't think it is a matter of too large a wheel and tire combination. Also, ride height is stock and passenger wheel does not rub. Again, it only happens during mildly aggressive turning. I've had two BMW shops look at it and they say everything is tight and looks good. Could this be bad bushing or sway bar issue? I think this might have been going on prior to the suspension upgrade (car had wider tires and wheels, so I thought it was that), so I'm not one to blame the new suspension components. Thanks!!! __________________ 2012 135i Alpine White DCT
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09-02-2015, 10:32 AM	#3
chris82 Brigadier General 827 Rep 3,856 Posts Drives: 128i Join Date: Aug 2012 Location: NY NY iTrader: (8) Garage List 2009 BMW 128i [9.80]	Can you post a pic? I'm not sure I get what you're saying . . .
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09-06-2015, 10:15 PM	#4
HP Autosport Supreme Allied Commander 3845 Rep 54,376 Posts Drives: F80 M3 Join Date: Mar 2007 Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com iTrader: (36)	What do you mean by deflect? As the suspension is in a compression, rebound or side forces applied? You should have a lot more camber than -0.5 in the rear to start with. Where is your toe? The rear suspension should gain negative camber as it compresses and add toe in at the same time.
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09-06-2015, 10:16 PM	#5
HP Autosport Supreme Allied Commander 3845 Rep 54,376 Posts Drives: F80 M3 Join Date: Mar 2007 Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com iTrader: (36)	What do you mean by deflect? As the suspension is in a compression, rebound or side forces applied? You should have a lot more camber than -0.5 in the rear to start with. Where is your toe? The rear suspension should gain negative camber as it compresses and add toe in at the same time.
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