Rear feels like it is trying to skip or jump through curves at speed.

Lambobimmer · 08-25-2011, 07:44 PM

I recently bought a set of Apex ARC-8's and I had MPSS installed on them. I am running 235/40 on the fronts and 265/35 on the rears.

I have the BMW Performance suspension and I pulled the strut alighment PIN before I had my alignment done. I have about .80 degrees of negative camber on both sides of the front and the rears are in spec.

When I go around curves at high speed it feels like the back of the car is trying to skip or jump through the curve. It almost feels like the extra grip that I am getting from the larger MPSS is causing this.

Any ideas?

dicker · 08-26-2011, 01:33 AM

you need M3 rear subframe bushings. I have similar suspension and wheels/tires and the same issue.

fboutlaw · 08-26-2011, 02:21 AM

Did I hear skipping with Arc-8's and MPSS... sounds eerily familiar...

Just uploaded this from last weekend:

Same situation, but I also had a blown rear shock.

Lambobimmer · 08-26-2011, 04:27 AM

Quote:

Originally Posted by fboutlaw

Did I hear skipping with Arc-8's and MPSS... sounds eerily familiar...

Just uploaded this from last weekend:

Same situation, but I also had a blown rear shock.

Did replacing your blown shock fix your situation? Maybe I also have the same problem.

sluflyer06 · 08-26-2011, 10:15 AM

What does 'MPSS' mean?

Kamal · 08-26-2011, 11:06 AM

Quote:

Originally Posted by sluflyer06

What does 'MPSS' mean?

Michelin Pilot Super Sports..

IGoFast1589 · 08-26-2011, 12:06 PM

It's probably the rear subframe bushings are just bouncing around more now that their is less forgiveness in the rest of your suspension. Also could be too much bump dampening in the dampers, but it's most likely the bushings.

08-25-2011, 07:44 PM	#1
Lambobimmer Major 292 Rep 1,473 Posts Drives: 2022 X3 M40i, 2018 TTRS Join Date: Jan 2010 Location: Tarheel iTrader: (14)	Rear feels like it is trying to skip or jump through curves at speed. I recently bought a set of Apex ARC-8's and I had MPSS installed on them. I am running 235/40 on the fronts and 265/35 on the rears. I have the BMW Performance suspension and I pulled the strut alighment PIN before I had my alignment done. I have about .80 degrees of negative camber on both sides of the front and the rears are in spec. When I go around curves at high speed it feels like the back of the car is trying to skip or jump through the curve. It almost feels like the extra grip that I am getting from the larger MPSS is causing this. Any ideas? Last edited by Lambobimmer; 08-26-2011 at 04:21 AM..
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08-26-2011, 01:33 AM	#2
dicker Captain 69 Rep 847 Posts Drives: F80 6MT Join Date: Apr 2008 Location: SoCal iTrader: (8)	you need M3 rear subframe bushings. I have similar suspension and wheels/tires and the same issue.
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08-26-2011, 02:21 AM	#3
fboutlaw Cone Cruncher 31 Rep 534 Posts Drives: Dinan 135i Join Date: Apr 2010 Location: Cupertino, CA iTrader: (3)	Did I hear skipping with Arc-8's and MPSS... sounds eerily familiar... Just uploaded this from last weekend: Same situation, but I also had a blown rear shock.
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08-26-2011, 10:15 AM	#5
sluflyer06 Private First Class 6 Rep 170 Posts Drives: 2008 135i MT Join Date: Jul 2011 Location: St. Louis, MO iTrader: (2)	What does 'MPSS' mean? __________________ 08' 135i MT \|\| Cobb Stage 1 'Aggressive' 4.01 Map \| BMS DCI \| Berk Mid Pipes \| Maddad Eurosport Axleback \| E93 FSB \| M-Sport Black on Black \| CDV Delete \|\|
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08-26-2011, 12:06 PM	#7
IGoFast1589 Captain 49 Rep 654 Posts Drives: 08 135i Join Date: Nov 2010 Location: NY iTrader: (2)	It's probably the rear subframe bushings are just bouncing around more now that their is less forgiveness in the rest of your suspension. Also could be too much bump dampening in the dampers, but it's most likely the bushings.
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