H&R ARBs on MRs ?

[swamper]

Not sure if the MR has any.
That is maybe the reason some are fitting the underbody braces (http://www.strong-strut.com/body-brace.htm or like @Anthony Cherry is making), which are actually the same type of reinforcements.

I had one..it got nicked at Santa pod last year..!!

 

[Dino D]

@swamper, just had a look on realoem, the S50 ///M has a 23mm front ARB as stock, the 3.0 has a 25mm ARB as stock and the m-sport a 25.5mm ARB as stock, somewhere along the line BMW decided to uprate these it seems.

Would the increased castor on the ///M have perhaps have an effect on the ARB diameter?

Then just wondering if the ///M has more negative camber dialed in over the standard cars and if that affects the ARB used.

 

[Dino D]

I have mine set on soft, front and rear, the difference out of the box was enough to leave them alone

Out of interest was that before or after you fitted the BC suspension?

 

[swamper]

Would the increased castor on the ///M have perhaps have an effect on the ARB diameter?

Then just wondering if the ///M has more negative camber dialed in over the standard cars and if that affects the ARB used.

the suspension is angled on the front of the M...i wonder if anyone has an explanation why ?

 

[Dino D]

Some interesting info on the caster and camber here:
http://www.powerflex.co.uk/road-series/geometry-information

 

[swamper]

thanks Dino....says excatly what its for

 

[zedonist]

This shows the roll on a bog standard Z3:

 

[swamper]

thats a fair bit Zed...!!

 

[zedonist]

Well mine was worse than that until the H&R and now it's flat, anyone who says their oem Zed is good handling never goes above 30mph IMHO...

 

[Chazzy]

I fitted the H&R ARBs to mine and felt a vast improvement, it was part of a massive overhaul though. Previously I found the car quite wallowy and snappy. Since fitting these the car is much more predictable and planted. I run them both on the soft setting. I would never run them hard on the front, it would push the mechanical balance too far forward. I've not driven it hard enough yet on a track to make any set up changes.

 

[swamper]

Ok Chazzy thanks for the reply.
Mines had a full suspension refresh and feels planted as it is...I reckon I'm just going to have to get a set and see how it goes