What is different about the M3 front suspension?

chris82 · 10-24-2014, 09:23 AM

From my understanding you have the upper control arm (or tension arm), the lower control arm, the sway bar, and the sway bar mounting brackets. What else is different?

Thanks

andrey_gta · 10-25-2014, 01:50 PM

Sway bars are thicker & hollow
Front - both arms are diffrerent, in bushings and the lower one is longer for camber
Rear - beefier non flexing arms all around.
The rear shock is mounted differently - more securely to an aluminum arm-carrier that may have less flex

HP Autosport · 11-02-2014, 09:17 PM

Quote:

Originally Posted by Chrisar82

From my understanding you have the upper control arm (or tension arm), the lower control arm, the sway bar, and the sway bar mounting brackets. What else is different?

Thanks

The thrust arm is basically the same other than the bushing. The wishbone has a bearing instead of a rubber bushing.

Front subframe is different and reinforced. Strut tower brace is also stronger.

Steering rack is quick ratio.

upright is much stronger with less flex.

Springs and shocks are different.

Anti roll bar mounts in better bushings and are slightly larger.

If I left anything out, please feel free to fill in.

chris82 · 11-05-2014, 08:08 AM

Quote:

Originally Posted by HP Autosport

The thrust arm is basically the same other than the bushing. The wishbone has a bearing instead of a rubber bushing.

Front subframe is different and reinforced. Strut tower brace is also stronger.

Steering rack is quick ratio.

upright is much stronger with less flex.

Springs and shocks are different.

Anti roll bar mounts in better bushings and are slightly larger.

If I left anything out, please feel free to fill in.

The Thrust arm is what I am calling the tension arm right?

What do you mean "upright is much stronger with less flex" ?

ShocknAwe · 11-05-2014, 10:25 AM

Quote:

Originally Posted by Chrisar82

The Thrust arm is what I am calling the tension arm right?

What do you mean "upright is much stronger with less flex" ?

confused on this one as well

HP Autosport · 11-05-2014, 12:27 PM

Quote:

Originally Posted by Chrisar82

The Thrust arm is what I am calling the tension arm right?

What do you mean "upright is much stronger with less flex" ?

Yes.

upright is the spindle.

10-24-2014, 09:23 AM	#1
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]	What is different about the M3 front suspension? From my understanding you have the upper control arm (or tension arm), the lower control arm, the sway bar, and the sway bar mounting brackets. What else is different? Thanks
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10-25-2014, 01:50 PM	#2
andrey_gta Brigadier General 298 Rep 4,040 Posts Drives: 130i coupé ;) Join Date: Nov 2011 Location: Bimmerpost iTrader: (1) Garage List 2008 BMW 128i [10.00]	Sway bars are thicker & hollow Front - both arms are diffrerent, in bushings and the lower one is longer for camber Rear - beefier non flexing arms all around. The rear shock is mounted differently - more securely to an aluminum arm-carrier that may have less flex __________________ 128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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