[Raimund]

Looking for advice on if removing the rear sway bar might benefit the handling on my setup.
It seems to be common on track cars running higher spring rates. Would be nice to drop some extra weight too. Anyone here running no bar? Results?

Front
Tckline SA coilovers 336/672
Megan upper strut brace
M3 front upper and lower control arms
Dinan camber plates
E90 m3 sway bar
Whiteline adjustable endlinks

Rear
Whiteline diff bushings
Dinan upper strut mounts
Whiteline subframe bushings
Oem non-m awd 15mm swaybar
Adjustable toe arm
E92 subframe brace to chassis
3,91 open diff
Vwetish diff brace

Alignment
Front
Camber -3.5
Toe 1/16 total

Rear
Camber -2
Toe 1/8 total

Rebound
Front 1.5 turn
Rear max

[Brian86]

What are you trying to accomplish?

[Raimund]

Originally Posted by Brian86

What are you trying to accomplish?

Just trying to get it to handle as good as it can. I come from e36's where most of the track guys didn't run rear sway bars but only saw a few guys here running no rear sway.

Usually the benefit would be not lifting inner rear tire coming out of a corner so you can get back on the throttle quicker

[Tambohamilton]

Are you having problems with lifting the inner rear wheel, or being able to get on the power early?

Removing it will aid rear end grip, but will shift the balance further towards understeer. So you need to decide for yourself if that would help your car. My hunch is that you're better off as it is, but I doubt it'd make much difference either way.

[Brian86]

It doesn't sound like you're doing anything where it would make a difference.

The rear is more sensitive to toe adjustments to tweak steady state cornering, which is basically what the rear bar is also trimming. The rear bar is very small and doesn't move the needle much.

I basically use mine in the dry, and pop off an end link in the rain since it's not practical to change the toe settings all the time.

[Tambohamilton]

Is it just me, or is 1/8" total toe quite a lot?

[Raimund]

Originally Posted by Tambohamilton

Are you having problems with lifting the inner rear wheel, or being able to get on the power early?

Removing it will aid rear end grip, but will shift the balance further towards understeer. So you need to decide for yourself if that would help your car. My hunch is that you're better off as it is, but I doubt it'd make much difference either way.

Since I'm still on staggered wheels, more understeer doesn't sound like a good idea. I'll leave it alone, thanks for the knowledge

[Raimund]

Originally Posted by Brian86

It doesn't sound like you're doing anything where it would make a difference.

The rear is more sensitive to toe adjustments to tweak steady state cornering, which is basically what the rear bar is also trimming. The rear bar is very small and doesn't move the needle much.

I basically use mine in the dry, and pop off an end link in the rain since it's not practical to change the toe settings all the time.

That makes sense. Thanks for the help 🙂

[Raimund]

Originally Posted by Tambohamilton

Is it just me, or is 1/8" total toe quite a lot?

Tckline has 3/16 in total rear recommended on his alignment spec sheets for the coilovers, so I'm running less than that still. How much are you running? I haven't tried different settings there

[Tambohamilton]

I don't track my car or anything, and run stock msport rear geo. I also have staggered tyres, and used an e93 m3 rear sway to rob the back end of some grip...I'd switch down to an e90 m3 one if I did it again. (E91 330d RWD)