Anyone fitted uprated Anti roll bars?

I fitted the H&R ARB to a 20i Msport.

Unfortunately I also changed the shocks to bilstein b8s and changed the wheels so difficult to baseline the specific effect of the ARB

Running conti sport 5p tyres

Overall result is a much more controlled ride, firmer but not uncomfortably so...slightly jiggly at slow speeds, more a kind of feeling for the road surface

Car doesn’t get out of shape in the above 60-70 bumpy swoopy bends.

Doesn’t bottom out anymore under normal high speed runs and corners more surely ...

Only thing is that a bump mid corner on one wheel can push the car more so than it did , but offset against that is an overall more planter sure footed feel..

Sorry for the waffle.. :rofl:
 
David-H has done to his pervious 35i, with good results along with Eibachs as Pbondar above has.

Also Player-1 has done along with some M3 front arms amongst other mods. He reports a big improvement.

Be worth highlighting them for a read. :thumbsup:
 
I did roll bars first, followed by the M3 control arms a few weeks later.
I'd echo the effects Pbondar has already described. Makes everything feel much more stable and gives a lot more confidence in the car. It is a bit more jiggly on bad surfaces but is negligible.

The M3 components are a different prospect, there a bit more involved when fitting but the results are improved steering feel and a big improvement in outright grip as the wheels aren't deflexing under load as they used to.

Taking part in the bmw clubs Welsh Weekend a little while ago I could easily hang with the M3's and M2's in corners. The half hour or so a 35is was following me, I was pulling a good 3-4 car lengths on each corner. Throughly recommended :thumbsup:
 
Player 1 said:
I did roll bars first, followed by the M3 control arms a few weeks later.
I'd echo the effects Pbondar has already described. Makes everything feel much more stable and gives a lot more confidence in the car. It is a bit more jiggly on bad surfaces but is negligible.

The M3 components are a different prospect, there a bit more involved when fitting but the results are improved steering feel and a big improvement in outright grip as the wheels aren't deflexing under load as they used to.

Taking part in the bmw clubs Welsh Weekend a little while ago I could easily hang with the M3's and M2's in corners. The half hour or so a 35is was following me, I was pulling a good 3-4 car lengths on each corner. Throughly recommended :thumbsup:
Click to expand...
WHich Roll bars exactly, can you place a link please?
 
mcbutler said:
Player 1 said:
I did roll bars first, followed by the M3 control arms a few weeks later.
I'd echo the effects Pbondar has already described. Makes everything feel much more stable and gives a lot more confidence in the car. It is a bit more jiggly on bad surfaces but is negligible.

The M3 components are a different prospect, there a bit more involved when fitting but the results are improved steering feel and a big improvement in outright grip as the wheels aren't deflexing under load as they used to.

Taking part in the bmw clubs Welsh Weekend a little while ago I could easily hang with the M3's and M2's in corners. The half hour or so a 35is was following me, I was pulling a good 3-4 car lengths on each corner. Throughly recommended :thumbsup:
Click to expand...
WHich Roll bars exactly, can you place a link please?
Click to expand...

H&R

https://z4-forum.com/forum/viewtopic.php?f=23&t=108512
 
Thanks for the info Player1, also caught up with your thread on PH. Sounds like a must do mod.
Any pictures of the head light levelling bracket you needed to make.
Bit confused over the links discussion, needing something else fabricating on the rear ? Then the option of parts from Turner ?
Are you going to ZedFest ?
 
As john-E89 says, I did fit uprated ARBs to my 35i. This is what I wrote at the time:

"Together with getting rid of runflats, fitting Eibach PRO-KIT performance springs (part No 20109.140) together with Eibach Performance Stabiliser Bars (thicker than OEM front & rear ARBs) make a real and very significant difference to the handling! Springs lower the front by about 0.8" and the rear by 0.4" and stability, especially when cornering, is amazing!"
 
9designs said:
Thanks for the info Player1, also caught up with your thread on PH. Sounds like a must do mod.
Any pictures of the head light levelling bracket you needed to make.
Bit confused over the links discussion, needing something else fabricating on the rear ? Then the option of parts from Turner ?
Are you going to ZedFest ?
Click to expand...

No problem at all, I'll try and stick a camera in there this evening and send you a message about the bracket :thumbsup:

Sorry, the rear droplinks are difficult to describe! The standard droplink has a rubber bush with a hole where the original roll bar pushes through, this is okay because its all part of the roll bar and can't pivot up/down.
The roll bars from the likes of H&R and Eibach don't have anything that pushes through the original bush, instead there's three holes and they expect you to put a bolt through the bush and tighten it up the their roll bar. This doesn't work because you will never be able to tighten the bolt fully as you're clamping a rubber bushing that'll deflex. You'll then get an element of up/down movement which negates the effect of the anti roll bar.
Hopefully that makes a bit more sense?

My solution was to make up new droplinks which consist of an eye that attaches to the axle and a rod end (similar to those on the front axle drop links) that bolts up to the new anti roll bar. That way there's no play so the anti roll bar can work properly.

I won't be at zedfest I'm afraid but the car is on the BMW club stand for the Silverstone Classic next weekend, happy to meet up there if you can make it. :)
 
I found these, seemed to have kit purposed designed for the E89, plus other bushes and adjustment.
https://www.superproeurope.com/products.cfm?vehicleid=1433
 
9designs said:
I found these, seemed to have kit purposed designed for the E89, plus other bushes and adjustment.
https://www.superproeurope.com/products.cfm?vehicleid=1433
Click to expand...

Interesting...I assume these are similar to player 1 mods plus sort out the headlamp levelling issue..but they imply one kit for most EXX series cars and I thought the e89 was ‘handed’ differently?

Wonder on a 0-100 scale how much benefit comes from this kit and how much from their myriad of bush kits?
 
Pbondar said:
9designs said:
I found these, seemed to have kit purposed designed for the E89, plus other bushes and adjustment.
https://www.superproeurope.com/products.cfm?vehicleid=1433
Click to expand...

Interesting...I assume these are similar to player 1 mods plus sort out the headlamp levelling issue..but they imply one kit for most EXX series cars and I thought the e89 was ‘handed’ differently?

Wonder on a 0-100 scale how much benefit comes from this kit and how much from their myriad of bush kits?
Click to expand...

That kit won't get around the headlight levelling bracket I'm afraid, the contemporary 3 and 1 series' had their level sensor on the passenger side whereas the Z4's is on the drivers side. The lower wishbones in that kit are the M3 parts, I checked European cars too thinking they might be the other way round but are not.

Here's what I wrote to a friend that was asking about the same thing;
''I made up a small bracket to fit onto the new wishbone but it really doesn't need to be anything fancy, the existing link is just clipped onto the wishbone so can be unclipped and made to fit the new M3 wishbone with the aid of a metal cable tie. Just make sure to measure the distance from the floor to the level sensor arm before dismantling as it'll minimise any need to adjust the headlight levels once completed.
That probably sounds like a lot but it really is a very simple job! The control arms themselves are dead easy to swap over and very accessible.''

I do also wonder how much benefit comes from the myraid of bushes, chiefly how much they will affect NVH as they all look to be poly bushes. The e89 already has an upgraded version of the e85's rear axle where most of the bushes are replaced with ball joints (same as a Z4M/e46 M3) except for two which I changed for Z4M ball joints.
The beauty of the M3 parts is that they are all properly developed by BMW and are easily replaceable when the time comes, NVH is barely impacted at all.
I suppose it depends what you want out of the car at the end of the day.
 
Player 1 said:
Pbondar said:
9designs said:
I found these, seemed to have kit purposed designed for the E89, plus other bushes and adjustment.
https://www.superproeurope.com/products.cfm?vehicleid=1433
Click to expand...

Interesting...I assume these are similar to player 1 mods plus sort out the headlamp levelling issue..but they imply one kit for most EXX series cars and I thought the e89 was ‘handed’ differently?

Wonder on a 0-100 scale how much benefit comes from this kit and how much from their myriad of bush kits?
Click to expand...

That kit won't get around the headlight levelling bracket I'm afraid, the contemporary 3 and 1 series' had their level sensor on the passenger side whereas the Z4's is on the drivers side. The lower wishbones in that kit are the M3 parts, I checked European cars too thinking they might be the other way round but are not.

Here's what I wrote to a friend that was asking about the same thing;
''I made up a small bracket to fit onto the new wishbone but it really doesn't need to be anything fancy, the existing link is just clipped onto the wishbone so can be unclipped and made to fit the new M3 wishbone with the aid of a metal cable tie. Just make sure to measure the distance from the floor to the level sensor arm before dismantling as it'll minimise any need to adjust the headlight levels once completed.
That probably sounds like a lot but it really is a very simple job! The control arms themselves are dead easy to swap over and very accessible.''

I do also wonder how much benefit comes from the myraid of bushes, chiefly how much they will affect NVH as they all look to be poly bushes. The e89 already has an upgraded version of the e85's rear axle where most of the bushes are replaced with ball joints (same as a Z4M/e46 M3) except for two which I changed for Z4M ball joints.
The beauty of the M3 parts is that they are all properly developed by BMW and are easily replaceable when the time comes, NVH is barely impacted at all.
I suppose it depends what you want out of the car at the end of the day.
Click to expand...

:thumbsup:
 
Did wonder about the headlight levelling, but as it was listed as a E89 kit it could have had it in the correct side.

Poly bushes much like Powerflex I guess. Looks like you can buy them separate or they are already in the complete kit.
As I don’t have access to a ramp, I will need to book it in somewhere so was looking for something that required minimum scheming up to make work. Plus it will need tracking before it’s driven.
 
Sorry to revive this thread from a few months back.

I am ordering Eibach pro springs and ARB kit for my 35iS. Little confused with all the above jargon tbh. So just asking a little simplified question to those in the know.. :)
My car has the adaptive dampers. Which I still want to maintain.

Is there any issue with the use of the cars adaptive dampers or any other downside associated due to the Eibach parts when they get fitted ?

I think the answer is No, but wanted to double check b4 pulling the trigger.

Thank you
 
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