Steering deflection on bad roads? - BMW 3-Series (E90 E92) Forum

cvc 22349a · 09-21-2009, 11:10 AM

When I hit a rut or crack in the road while in a curve my steering wheel deflects. It's a momentarily uncontolled feeling.. Any one know what causes this: soft bushings, upper shock mounts...? I have the stock sport supension with Koni FSD's and 19" Alufelgen CSL reps with PS2's.

ALUFELGEN · 09-21-2009, 07:38 PM

Quote:

Originally Posted by cvc 22349a

When I hit a rut or crack in the road while in a curve my steering wheel deflects. It's a momentarily uncontolled feeling.. Any one know what causes this: soft bushings, upper shock mounts...? I have the stock sport supension with Koni FSD's and 19" Alufelgen CSL reps with PS2's.

What you are describing sounds like bump steer. I would recommend getting an alignment and adjusting your camber to maximum factory allowable and adjust your toe-in as well.

-Matt

lonestar22 · 09-21-2009, 10:39 PM

my car does this horribly.. every grove in the highway my car wants to be apart of

cvc 22349a · 09-22-2009, 09:39 AM

Quote:

Originally Posted by AluFelgen

What you are describing sounds like bump steer. I would recommend getting an alignment and adjusting your camber to maximum factory allowable and adjust your toe-in as well.

-Matt

Will give that a try Matt. Just don't want to lose too much straight line stability. I was just mentioning my mods; I don't think this has anything to do with the wheels/tires.

200Duece · 09-23-2009, 10:58 AM

that's pretty typical for the stock suspension unfortunately

cvc 22349a · 09-23-2009, 12:37 PM

It sucks. The roads really suck up here. Gonna try changing alignment settings. Just thought I might be able to minimize or eliminate that with different bushings. Don't even know where I could get different shock mounts. And even then, I'm sure there'd be tradeoffs..

Tee-Dub · 09-23-2009, 01:11 PM

Quote:

Originally Posted by lonestar22

my car does this horribly.. every grove in the highway my car wants to be apart of

Typical of every BMW I've owned. That precise sensitive steering performance comes with a price.

09-21-2009, 11:10 AM	#1
cvc 22349a Lieutenant Colonel Drives: 335i Join Date: Sep 2007 Location: SF Bay Posts: 1,760 iTrader: (8)	Steering deflection on bad roads? When I hit a rut or crack in the road while in a curve my steering wheel deflects. It's a momentarily uncontolled feeling.. Any one know what causes this: soft bushings, upper shock mounts...? I have the stock sport supension with Koni FSD's and 19" Alufelgen CSL reps with PS2's.
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09-21-2009, 10:39 PM	#3
lonestar22 Ground Clearance? Drives: 330i Join Date: Jul 2009 Location: DFW Posts: 1,345 iTrader: (-1)	my car does this horribly.. every grove in the highway my car wants to be apart of __________________ Slammed E90. One of the First. Stay Fitted

09-23-2009, 10:58 AM	#5
200Duece Colonel Drives: '73 2002,'12 X5 35d,'12 335 SL Join Date: Jan 2007 Location: A Whale's Vagina, Ca Posts: 2,552 iTrader: (5)	that's pretty typical for the stock suspension unfortunately __________________ 1988 E28 535is Euro Conversion --- sold 2009 E90 335 6MT --- sold

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09-23-2009, 12:37 PM	#6
cvc 22349a Lieutenant Colonel Drives: 335i Join Date: Sep 2007 Location: SF Bay Posts: 1,760 iTrader: (8)	It sucks. The roads really suck up here. Gonna try changing alignment settings. Just thought I might be able to minimize or eliminate that with different bushings. Don't even know where I could get different shock mounts. And even then, I'm sure there'd be tradeoffs..