BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      06-12-2018, 10:24 AM   #111
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Originally Posted by frontside0815 View Post
Did anyone do this with a 1series with active steering equipped?

I drove the 1M from a friend and the biggest difference is the Feeling of steeering...

so i think about doing the swap, but i am not sure if its possible because my car has active steering...
I'm not sure it'd be a huge improvement. I really liked the active steering on my E90 once I got used to it. I think the fastest ratio is actually faster than the M3 ratio too.
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      06-13-2018, 04:05 PM   #112
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does the M3 use Pentosin CHF 11S or ATF? did you guys flush the system?
both use chf11s
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      07-24-2018, 09:12 PM   #113
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Does it say active steering on a Vin report to tell if you have it or not?
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      07-26-2018, 01:58 PM   #114
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Yes active steering is a option it should display on any vin decoder
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      08-01-2018, 04:47 PM   #115
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Quote:
Originally Posted by Traf View Post
Yes active steering is a option it should display on any vin decoder
what's the best place to buy an m3 rack
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      08-02-2018, 04:17 AM   #116
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Quote:
Originally Posted by dleccord View Post
what's the best place to buy an m3 rack
I don't know, got all my racks from ebay.
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      08-03-2018, 01:57 AM   #117
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Quote:
Originally Posted by Traf View Post
Quote:
Originally Posted by dleccord View Post
what's the best place to buy an m3 rack
I don't know, got all my racks from ebay.
do we use m3 or stock inner/outer rods? I have m3 control arms up front fwiw
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      08-03-2018, 08:06 AM   #118
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Quote:
Originally Posted by dleccord View Post
do we use m3 or stock inner/outer rods? I have m3 control arms up front fwiw
The ball joints are identical as far as my eye could tell. The M3 outer tie rods just had longer threads (more toe adjust ability). I used the M3 tie rods that came with my EBAY M3 rack because they had less mileage. I measure how much thread was exposed on my old rack and adjusted the outer tie rod on the M3 rack to match. Got the car aligned for peace of mind and toe was only off about .05* or so (like 1 thread/turn of the tie rod).
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      08-04-2018, 03:32 AM   #119
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Quote:
Originally Posted by dleccord View Post
do we use m3 or stock inner/outer rods? I have m3 control arms up front fwiw
Use stock tie rods or you won't be able to fully adjust the toe
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      08-07-2018, 11:40 AM   #120
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Quote:
Originally Posted by Traf View Post
Use stock tie rods or you won't be able to fully adjust the toe
This is the correct answer. The M3 control arms are too long.
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      08-07-2018, 06:09 PM   #121
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Quote:
Originally Posted by Traf View Post
Use stock tie rods or you won't be able to fully adjust the toe
Thats actually wrong when you have an M3 rack with M3 control arms.

In that case you should use M3 tie rods. I foolishly believed the internet with this advice and purchased new stock tie rods to go with the M3 rack. Turns out the stock tie rods had to be extended out further to achieve correct aligment. My stock tie rods already had to be extended out ~5mm to compensate for the M3 control arms. They needed to be further extended out to work with the steering rack.

EDIT:

Looks like M3 tie rods won't work either, my bad. But the end of the threads of the M3 tie rods can be cut 10mm so the thread doesn't bottom out. This is probably more preferable than extending the non M tie rods so far out.
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Last edited by vtl; 02-07-2019 at 08:09 PM..
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      08-08-2018, 07:48 AM   #122
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Quote:
Originally Posted by vtl View Post
Thats actually wrong when you have an M3 rack with M3 control arms.

In that case you should use M3 tie rods. I foolishly believed the internet with this advice and purchased new stock tie rods to go with the M3 rack. Turns out the stock tie rods had to be extended out further to achieve correct aligment. My stock tie rods already had to be extended out ~5mm to compensate for the M3 control arms. They needed to be further extended out to work with the steering rack.
I have M3 rack and M3 arms, i absolutly have to use stock tie rods. It should be noted that this will depend on ride height and camber settings.
Do you have M3 spindles ?

Last edited by Traf; 08-08-2018 at 07:58 AM..
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      08-08-2018, 05:30 PM   #123
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Quote:
Originally Posted by Traf View Post
I have M3 rack and M3 arms, i absolutly have to use stock tie rods. It should be noted that this will depend on ride height and camber settings.
Do you have M3 spindles ?
No I don't have M3 spindles. Toe doesn't change much based on ride height, otherwise the car would steer a lot on compression. My stock tie rods are extended out way more than the stock arms,stock rack.
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      08-09-2018, 10:00 AM   #124
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Quote:
Originally Posted by vtl View Post
Thats actually wrong when you have an M3 rack with M3 control arms.

In that case you should use M3 tie rods. I foolishly believed the internet with this advice and purchased new stock tie rods to go with the M3 rack. Turns out the stock tie rods had to be extended out further to achieve correct aligment. My stock tie rods already had to be extended out ~5mm to compensate for the M3 control arms. They needed to be further extended out to work with the steering rack.
Weird, I wonder if there's a variation in the M3 racks. I did the rack and control arms at the same time and the M3 tie rods that came with the rack were too long to get the toe back in check. A new set of stock tie rods fit perfect.
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      08-09-2018, 05:26 PM   #125
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How much thread is exposed on your tie rods with the stock tie rods + m3 rack?

A standard 135i has around 10mm of exposed thread. It should be noted I am RHD, so LHD might be different, although the M3 tie rods are the same part number for both LHD and RHD
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      08-10-2018, 12:23 PM   #126
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Quote:
Originally Posted by vtl View Post
How much thread is exposed on your tie rods with the stock tie rods + m3 rack?

A standard 135i has around 10mm of exposed thread. It should be noted I am RHD, so LHD might be different, although the M3 tie rods are the same part number for both LHD and RHD
I'm not sure exactly, I had to get new ones since my stock ones were totally seized. I counted threads on the stock ones, set the new ones the same, then had some slight adjustment for the control arms, I don't remember how much but not more than a turn or two. I got it as close as I could with a tape measure to drive it to the alignment shop and it felt mostly fine.

The M3 knuckle is definitely a different part and the mount for the tie rod is definitely farther outboard than the 335/135 knuckle. I don't think there's any way the slight adjustment needed for the control arms is why the M3 tie rods are that much longer.
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      08-24-2018, 04:45 AM   #127
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I have M3 knuckle M3 arms and M3 rack and M3 front bits

1.8 camber

with all the rods screwed in to the max I cant achieve zero toe,
only slightly open toe

if I use non original BMW tie rod ball joint (mahle) then I can achieve zero toe, maybe the thread inside goer further compared to original BMW ones
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      08-24-2018, 01:00 PM   #128
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Thumbs up

I love the BMW heavy steering! I had an interesting conversation with another car enthusiast that was saying it's a deal breaker, either people love the heavy BMW steering or hate it. It's one of those things when someone drives me car their like wow the steering is so heavy!

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      08-24-2018, 02:20 PM   #129
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Quote:
Originally Posted by FLATBMW View Post
I love the BMW heavy steering! I had an interesting conversation with another car enthusiast that was saying it's a deal breaker, either people love the heavy BMW steering or hate it. It's one of those things when someone drives me car their like wow the steering is so heavy!

When you're doing 100mph around a track it doesn't feel heavy LOL. Autocross can be a bit annoying, but when autocross courses are slow enough to cause the steering to start feeling heavy they are LAME to begin with.

EPS just feels outright wrong after having the M3 rack.

Still surprise to see how may people cant get 0 toe with M3 tie rods. Maybe there are difference parts because the ones I used were only like 1/4" longer than my stock E82 tie rods. Maybe they were regular E90 tie rods? who knows...
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      08-27-2018, 10:13 PM   #130
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This is a cool mod, but I cant say a faster rack has occurred to me. The rack on my Porsche 996 had around a 17.1:1 ratio, and I think my Cayman was about the same. The 135i rack is a little faster, and Im not sure Id call it slow.

Either way, cool idea.
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      08-27-2018, 10:40 PM   #131
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This is a cool mod, but I can’t say a faster rack has occurred to me. The rack on my Porsche 996 had around a 17.1:1 ratio, and I think my Cayman was about the same. The 135i rack is a little faster, and I’m not sure I’d call it slow.

Either way, cool idea.
Its 100% worth the swap. The m3 rack eliminates any hand over hand action. even in the hairpins.
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      09-11-2018, 03:04 PM   #132
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Hello. I have upgrated my E91 BMW steering rack with servotronic from M3. I've added to the VO the servotronic code $216. I've also connected the servo valve to the GBBF3. I've codded the servotronic option to active but nothing happened and the servotronic is not working. The steering rack is heavy.
Do you have any idea how to handle this issue? May I ask for some help. Thank you in advance.
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