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Old 03-14-2007, 03:06 AM   #1
DustenT
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Default Suspension Upgrade FAQ - READ THIS BEFORE POSTING!

Time for another FAQ thread, this time for suspension upgrades. Post everything you know or every wondered in this thread and I'll consolidate it. I'll start the list with some ideas, post your suggestions.

Official 318ti Suspension FAQ Thread.

This thread will be dedicated to frequently asked questions related to 318ti suspension components. Please post your questions here, and I'll combine all the questions and answers and keep them at the top of the thread.

Who makes front control arm bushings?
- The 1995 m3 bushings are offset and solid.
- The 1996+ m3 bushing are solid but not offset.
- Tree House Racing: Offset, urethane, Pre-Pressed(Big Plus for DiY types)
- Ground Control LCA bushing, Offset, Delrin encased in metal,
- Ireland Eng, offset, urethane

What about ball joints?
The OEM ball joints are soft and don't last long on lowered cars. The Meyle solid metal ball joints are much better. They can be purchased seperately or pre-pressed into the control arms. The pre-pressed solution is an easier install.

What about control arms?
- See above for the Meyle control arm/ball joint combo.
- e30 m3 aluminum control arms work too, but recommended replacement is every 2 years or X track days.

Who makes front camber correction kits?
- KMAC
- eibach
- bimmerworld
- TcKline

Who makes rear camber correction kits?
- Ireland Engineer makes a weld-on kit.
- eibach
- OEM BMW???(need confirmation)
- KMAC

Who makes rear trailing arm bushings (RTAB)?
- Ireland Engineer
- Powerflex

Who makes and what size sway bars should I use?
- 318ti stock sways (non-sport) 25mm front, 14mm rear
- HR
- Turner MotorSports
- BMW OE Club Sport (26mm front, 16mm rear)
- Racing Dynamics
- Europe Only Eibach(need this confirmed)
- AC Schnitzer(used to, not sure if it still made)
- eibach

Who makes rear shock mounts (RSMs)?
- Ground control (urethane)
- e46 m3 cabrio RSMs
- Koala Motorsports (koalamotorsports.com)
- TcKline- Buna rubber or solid spherical for race applications

Who makes sport suspension kits? Race kits?
- BILSTEIN
- KW
- KONI
- H&R
- WEITEC
- FK Automotice
- TcKline, two levels of coilovers

Who makes rear subframe bushings?
- Powerflex
- Ireland Engineering: either in race or street versions, call IE to order the race version. There is a difference between the Z3/Ti rear subframe bushings and E30 rear subframe bushings.

Who makes differential bushings?
- Powerflex, street or race versions

What is the x-brace? Where do I get it?
The "x-brace" is a cross reinforment brace that helps to connect the front crossmember to the front subframe rails. It is stock on all E36 convertibles (including Z3's) and the '95 M3 LTW. Although it was not stock on the E36 coupe, sedans and compacts it does improve chassis rigidity and handling if added... -courtesy of understeer.com


What kind of suspension should I go with if I just want a smooth ride?
- If you are on a budget, go with the HR sport springs or the BavAuto Sport springs. You'll need to run a shorter strut/shock too. I recommend the Bilstein sports.
- Bilsteins or Konis with the factory Mtech sport springs is another good combination, although not as much drop as the above listed combination.

Links for more information:

- Great link- http://e30m3performance.com/tech_art...tech/index.htm has a lot of good information on the E30 rear suspension

- Changes to suspension and the effect of that change- http://www.wtrscca.org/tech.htm
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