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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Robbing the e92 M3 for suspension parts



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      10-19-2008, 02:24 PM   #111
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      10-19-2008, 04:59 PM   #112
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The e92 M3 has more than just a few parts that are similar to 335i. The bushing kit by Dinan is nothing more than a M3 kit and I saw the M3 logo on the bushing and part number laser etched on the control arms. You can buy the part for your dealer and below are the part numbers.

Front control arms:

• LEFT TENSION STRUT WITH RUBBER MOUNTING 31102283575
• RIGHT TENSION STRUT WITH RUBBER MOUNTING 31102283576


Rear sub-frame:

• RUBBER MOUNTING FRONT – 33312283382 - Qty 2
• RUBBER MOUNTING REAR – 33312283383 - Qty 2


FWI, the front suspension on e92 is identical with e92 M3, as well as, 90% of the rear suspension. You can literally bolt on an M3 suspension and brakes ect. The only real difference between between cars is the rear track width which is minor and a LSD. This should be of no real surprise.

I measure up the M3 strut bar today and it should fit so I order the parts ( http://www.realoem.com/bmw/showparts...61&hg=51&fg=75 ). This design is superior to any straight cross over bar from a mechanical stiffness point of view and much lighter. You need ever part of the RealOEM listed page and for item #6 you need the 12 mm bolt.

Orb

Orb

Do you think there is any mileage in changing the front wishbones as well as the tension struts??

Part numbers -

31102283577 LEFT WISHBONE
31102283578 RIGHT WISHBONE
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      10-19-2008, 06:06 PM   #113
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hmm... would the E92 M3 strut fit on a E92 328i? I checked under my hood and it looks like it should..
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      10-19-2008, 06:47 PM   #114
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Harold, for the rear links, this one for sure- 33322283549 - it is good idea if you have Quaife and will reduce toe out under acceleration. That is were you should stop unless you load test the other two forward links for stiffness.

Spill the beens on what you checked out on the rear.

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      10-19-2008, 08:27 PM   #115
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Quote:
Originally Posted by E92Fan View Post
Orb

Do you think there is any mileage in changing the front wishbones as well as the tension struts??

Part numbers -

31102283577 LEFT WISHBONE
31102283578 RIGHT WISHBONE
The wishbones use a stiffer isolator so they make a difference. Honestly, it is one of those things that you go all the way with for a reasonable outcome and low risk given the platform is the same. Doing parts and pieces might end with some undesirable result but the one front tension strut is a reasonable changing by it self. I am changing the whole thing out (front and rear) including changing my rear KW v3 dampeners to M3 style and the one rear diff mount as well.

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      10-19-2008, 08:33 PM   #116
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Has anyone tried the M3 Front Strut Tower Brace Kit yet?
Does it make a huge difference?
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      10-19-2008, 11:36 PM   #117
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Has anyone tried the M3 Front Strut Tower Brace Kit yet?
Does it make a huge difference?
I've been told that it does.

Orb, have you gotten yours yet?
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      10-19-2008, 11:41 PM   #118
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I've been told that it does.

Orb, have you gotten yours yet?
It is all coming for Germany....2-3 weeks.

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      10-20-2008, 02:20 AM   #119
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Quote:
Originally Posted by Orb View Post
Harold, for the rear links, this one for sure- 33322283549 - it is good idea if you have Quaife and will reduce toe out under acceleration. That is were you should stop unless you load test the other two forward links for stiffness.

Spill the beens on what you checked out on the rear.

Orb
Hi Orb,

You are referring to the rear toe link. There isnt enough deflection in our opinion to warrant an upgrade. I believe the M3 links are much longer, but please correct me if I am wrong. One option is just to replace the bushing with a joint for less deflection or build a custom adjustable link with Heim joints.

However, the other two links have much deflection and cause some bind, but we are not too concerned about them at this point in time for our project 335i.

Harold
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      10-20-2008, 03:23 AM   #120
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Quote:
Originally Posted by HP Autowerks View Post
Hi Orb,

You are referring to the rear toe link. There isnt enough deflection in our opinion to warrant an upgrade. I believe the M3 links are much longer, but please correct me if I am wrong. One option is just to replace the bushing with a joint for less deflection or build a custom adjustable link with Heim joints.

However, the other two links have much deflection and cause some bind, but we are not too concerned about them at this point in time for our project 335i.

Harold
Is this the link that Hotchkis has? They have a "rear camber kit" which matches your description and comes with 4 links. It definitely does look beefy...
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      10-20-2008, 10:51 AM   #121
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Quote:
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Is this the link that Hotchkis has? They have a "rear camber kit" which matches your description and comes with 4 links. It definitely does look beefy...
Yes, they are. May be a bit much for a street car and can be very noisy.
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      10-20-2008, 12:21 PM   #122
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Harold, how long did it take for your so called "strut brace kit" to come in?
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      10-20-2008, 12:45 PM   #123
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Yes, they are. May be a bit much for a street car and can be very noisy.
Good to know. I was wondering if they were noisy or not...

The M3 bits look quite a bit sturdier from photos since it's not a sheet of steel rolled into shape, but that's just looks, I have no data to quantify.
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      10-20-2008, 01:11 PM   #124
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Harold, how long did it take for your so called "strut brace kit" to come in?

Less than a week!
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      10-20-2008, 03:16 PM   #125
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Less than a week!
Wow!
How nice to miss the rush.
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      10-20-2008, 04:21 PM   #126
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Wow!
How nice to miss the rush.
What rush? No one was ordering any of the pieces back in May!
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      10-20-2008, 08:47 PM   #127
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Mine arrived last week (it took about 2 weeks); I haven't had a chance to install it because my car is in the paint shop. I kinda assembled it together but you guys get the idea on how it works. BTW; Is the stock E90 M3 brace black and silver or all black? I'm thinking of painting it all black, What do you guys think?





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      10-20-2008, 09:32 PM   #128
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Should be black and silver.
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      10-20-2008, 10:06 PM   #129
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Originally Posted by HP Autowerks View Post
Hi Orb,

You are referring to the rear toe link. There isnt enough deflection in our opinion to warrant an upgrade. I believe the M3 links are much longer, but please correct me if I am wrong. One option is just to replace the bushing with a joint for less deflection or build a custom adjustable link with Heim joints.

However, the other two links have much deflection and cause some bind, but we are not too concerned about them at this point in time for our project 335i.

Harold
There will be a lot deflection for the toe link…..I will let you rethink the geometry and loading. The M toe link are uses a spherical bearing at both end for this reason.

I guess you haven’t measured things up yet? I was able to figure out geometrically that the suspension has to be the same given a few details which are the shock attachment mount, the trailing (same on boht cars) arm and my handy tape measurer.

Replacing four front links, camber plates, six rear link and four sub frame isolators will essentially give you M car suspension feel and performance.


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      10-20-2008, 10:38 PM   #130
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Quote:
Originally Posted by Orb View Post
There will be a lot deflection for the toe link…..I will let you rethink the geometry and loading. The M toe link are uses a spherical bearing at both end for this reason.

I guess you haven’t measured things up yet? I was able to figure out geometrically that the suspension has to be the same given a few details which are the shock attachment mount, the trailing (same on boht cars) arm and my handy tape measurer.

Replacing four front links, camber plates, six rear link and four sub frame isolators will essentially give you M car suspension feel and performance.


Orb
Try it and let me know how it turns out!
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      10-21-2008, 12:03 AM   #131
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Quote:
Originally Posted by Orb View Post
There will be a lot deflection for the toe link…..I will let you rethink the geometry and loading. The M toe link are uses a spherical bearing at both end for this reason.

I guess you haven’t measured things up yet? I was able to figure out geometrically that the suspension has to be the same given a few details which are the shock attachment mount, the trailing (same on boht cars) arm and my handy tape measurer.

Replacing four front links, camber plates, six rear link and four sub frame isolators will essentially give you M car suspension feel and performance.


Orb
Can I please have the part name and numbers of the 4 front links please. And so for the four sub-frame isolators do you have to press it out of the sub-frame or they can be pop out to replace.
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      10-21-2008, 09:28 AM   #132
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What rush? No one was ordering any of the pieces back in May!
That's what I'm talking about.
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