Birds M135i
Author
Discussion

urquattroGus

Original Poster:

2,067 posts

221 months

Wednesday 20th January 2016
quotequote all
Just a quick (un-sponsored) plug for what birds have done to my M135i.

8 months ago I had the Quaife diff fitted along with their uprated anti roll bars and springs.

I've been really happy with the changes.

Firstly I have better traction pulling out of junctions, and less rear axle tramp/flickering of the traction control light at all speeds.

Most of all though, I now have confidence in pushing it round bends, the steering has a little more feel, and the car is just much more planted and stable.

It corners so sweetly.

Ride wise I would describe it as only 10% stiffer, and still a good everyday compromise. I have adaptive damper and now don't use the s[port setting anymore.

All in all I feel it makes it the car it always should have been.

The mods weren't cheap, but they have been fantastically well judged.

sp222

203 posts

180 months

Thursday 21st January 2016
quotequote all
How's the steering? I changed the wheels on mine before Christmas to "19 BBS. I drove the wifes people carrier while away over christmas and now driving the 135 feels really heavy (artificially so) - I'll get it checked, but am considering at least upgrading the suspension via Birds and would apprciate more consistency in the feel..

Good to hear your experience with adaptive dampers - did you also upgrade the Anti Roll bars? (I just read that you did...)

Cheers

Edited by sp222 on Thursday 21st January 13:50

Johnnytheboy

24,499 posts

217 months

Thursday 21st January 2016
quotequote all
When I was contemplating the M135i I thought I'd have the Birds diff. Hadn't given the suspension a thought.

I suppose it's hard for you to isolate the effect of one from the other if you had it all done at once.

mikeyscott

1,200 posts

239 months

Saturday 25th November 2017
quotequote all
urquattroGus said:
Just a quick (un-sponsored) plug for what birds have done to my M135i.

8 months ago I had the Quaife diff fitted along with their uprated anti roll bars and springs.

I've been really happy with the changes.

Firstly I have better traction pulling out of junctions, and less rear axle tramp/flickering of the traction control light at all speeds.

Most of all though, I now have confidence in pushing it round bends, the steering has a little more feel, and the car is just much more planted and stable.

It corners so sweetly.

Ride wise I would describe it as only 10% stiffer, and still a good everyday compromise. I have adaptive damper and now don't use the s[port setting anymore.

All in all I feel it makes it the car it always should have been.

The mods weren't cheap, but they have been fantastically well judged.
I’m back looking at these as an upgrade to my 135i, things I want as a must
Auto
3 door
Adaptive suspension to then change to Birds springs

My 135i is a manual and prime reason I want to change