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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 08-08-2013, 11:01 AM   #1
saace7
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Suspension overhaul checklist **REVIEW ADDED**

Doing a suspension overhaul. Let me know if I'm missing anything or if you recommend also getting something else.

107k miles on original ZHP suspension.

Bilstein sport shocks/struts
eibach pro springs
mounting hardware (guide, spring pads etc.)
steering flex disc
reinforcement plates for front and rear
controls arms were checked and good
tie rods were checked and good
FCAB changed 10-15k miles ago


Then doing a rear bushing change at a local bmw indy. Very trust worthy and will do the work at $80/hr. Told me should be a full one day job. 8hrs roughly.

I have powerflex RTAB x2 and turner rtab limiter to be installed

ordering these:

- Upper Inner Control Arm Bushings (Spring Arm) (Pair) (33321092247)
- Lower Inner Control Arm Bushings (Camber Arm) (Pair) (33326770824)
- Upper Outer Control Arm Bushings (Pair) (33326775551)
- Lower Outer Control Arm Bushings (Pair) (33326775551) Read that doing these instead of 33326771828 x2 will be an upgrade
- Front Differential Mounts (Pair) (33171093175MY)
- Rear Differential Mount (33176751808MY)
- Rear Subframe Mounts (set of 4) (33316770783 + 33316770784 + 33316770781)

Should be a total of 17 bushings.

Pretty sure I have everything. If you have any advise let me know! Thanks

Last edited by saace7; 09-01-2013 at 10:25 AM.
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Old 08-08-2013, 11:07 AM   #2
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See my suspension link.
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Last edited by Mango; 08-08-2013 at 11:07 AM.
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Old 08-08-2013, 11:11 AM   #3
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Aw man, don't get rid of the ZHP shocks/struts for Bilsteins! That's a big reason for having it
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Old 08-08-2013, 11:12 AM   #4
saace7
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See my suspension link.
I did and it is an amazing guide! It got all the basics done. I guess my question is more of, are there any other weak point parts I should replace while that shop has my rear end pulled out?

Quote:
Originally Posted by Zell View Post
Aw man, don't get rid of the ZHP shocks/struts for Bilsteins! That's a big reason for having it
I figured the bilstein would be an upgrade to the stock system. Especially paired with the eibach pro springs. Could you chime in on why you feel this way?

I am trying to improve over stock performance.

Last edited by saace7; 08-08-2013 at 11:17 AM.
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Old 08-08-2013, 11:21 AM   #5
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i would do all of stage 3 and have reinforcement to the subframe mounting done.

The Bilsteins are a massive upgrade over ZHP.
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Old 08-08-2013, 11:22 AM   #6
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Quote:
Originally Posted by saace7 View Post
I figured the bilstein would be an upgrade to the stock system. Especially paired with the eibach pro springs. Could you chime in on why you feel this way?

I am trying to improve over stock performance.
Oh then yeah paired with Eibach springs you will. I'm just a bit of a ZHP purist

The closest to ZHP shocks would be Koni FSD. They're basically the same in handling performance, but more added comfort.
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Old 08-08-2013, 11:26 AM   #7
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Oh then yeah paired with Eibach springs you will. I'm just a bit of a ZHP purist

The closest to ZHP shocks would be Koni FSD. They're basically the same in handling performance, but more added comfort.

For a ZHP purist, you should change out those bimmer brakez (or whatever brake package you bought) brakes. they aren't doing the zhp justice.

and OP wants an upgrade to ZHP performance--not the same.

Quote:
Originally Posted by saace7 View Post
I am trying to improve over stock performance.
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Last edited by Mango; 08-08-2013 at 11:36 AM.
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Old 08-08-2013, 11:33 AM   #8
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Originally Posted by Zell View Post
Fixed for accuracy. Re-read my post, understand the context, then try again. I know you can do it!
OP wants performance upgrade. You recommended suspension that has the same handling as the ZHP.
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Old 08-08-2013, 11:38 AM   #9
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Quote:
Originally Posted by Mango View Post
OP wants performance upgrade. You recommended suspension that has the same handling as the ZHP.


I agreed with OP saying that he will get better performance with that combination.

I then made an aside about ZHP shocks, because OP asked for why I thought he should stick with ZHP shocks due to the lack of a statement in his original post that he was trying to gain more handling performance.

Did you know that if you read what other people say rather than 3 key words so you can get to listening to yourself faster, you can actually respond appropriately?



The good news is, car parts can be fixed and replaced. Unfortunately for you, your attitude is unfixable. But, just like disposable car parts, you're very replaceable
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Last edited by Zell; 08-08-2013 at 11:55 AM.
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Old 08-08-2013, 11:41 AM   #10
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Quote:
Originally Posted by saace7 View Post
Doing a suspension overhaul. Let me know if I'm missing anything or if you recommend also getting something else.

107k miles on original ZHP suspension.

Bilstein sport shocks/struts
eibach pro springs
mounting hardware (guide, spring pads etc.)
steering flex disc
reinforcement plates for front and rear
controls arms were checked and good
tie rods were checked and good
FCAB changed 10-15k miles ago


Then doing a rear bushing change at a local bmw indy. Very trust worthy and will do the work at $80/hr. Told me should be a full one day job. 8hrs roughly.

I have powerflex RTAB x2 and turner rtab limiter to be installed

ordering these:

- Upper Inner Control Arm Bushings (Spring Arm) (Pair) (33321092247)
- Lower Inner Control Arm Bushings (Camber Arm) (Pair) (33326770824)
- Upper Outer Control Arm Bushings (Pair) (33326775551)
- Lower Outer Control Arm Bushings (Pair) (33326775551) Read that doing these instead of 33326771828 x2 will be an upgrade
- Front Differential Mounts (Pair) (33171093175MY)
- Rear Differential Mount (33176751808MY)
- Rear Subframe Mounts (set of 4) (33316770783 + 33316770784 + 33316770781)

Should be a total of 17 bushings.

Pretty sure I have everything. If you have any advise let me know! Thanks
OP, make sure you get NEW (3) differential bolts as well. Further, I'd go M3 rtabs instead of poly.
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Old 08-08-2013, 11:48 AM   #11
saace7
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OP, make sure you get NEW (3) differential bolts as well. Further, I'd go M3 rtabs instead of poly.
I got the bolts too. The powerflex came with the car uninstalled. So I figured I just install them.
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Old 08-08-2013, 11:51 AM   #12
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I got the bolts too. The powerflex came with the car uninstalled. So I figured I just install them.
http://www.vorshlag.com/product_info...roducts_id=421
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Old 08-08-2013, 11:54 AM   #13
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Wow they are cheaper than I thought.
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Old 08-08-2013, 11:56 AM   #14
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You might consider these:

http://www.turnermotorsport.com/p-36...3-z4-pair.aspx

They're very streetable, and don't transmit excessive noise or vibration from the shocks. It's kind of a pain to remove all the trunk lining, etc., to get at the rear shock mounts, so I wanted to make sure I only had to do it once!
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Old 08-08-2013, 11:58 AM   #15
saace7
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Originally Posted by bee-em-dougle-u View Post
You might consider these:

http://www.turnermotorsport.com/p-36...3-z4-pair.aspx

They're very streetable, and don't transmit excessive noise or vibration from the shocks. It's kind of a pain to remove all the trunk lining, etc., to get at the rear shock mounts, so I wanted to make sure I only had to do it once!
I missed that in my list. I have RSM ordered from turner.

Last edited by saace7; 08-08-2013 at 11:58 AM.
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Old 08-08-2013, 12:05 PM   #16
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Wow they are cheaper than I thought.
Did you read the article on why not to use Poly rtabs? and yes my OEM M3 bushings were $17 each
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Old 08-08-2013, 12:06 PM   #17
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I missed that in my list. I have RSM ordered from turner.
I got Rogue RSMs for mine. Definitely get the Rogues. I got mine off eBay for cheap brand new too............
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Old 08-08-2013, 12:15 PM   #18
saace7
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I read the article. I guess it has me a little concern but a lot of people run poly on their DD too with no complaints. I guess its what you personally want out of your ride. I've read if you lube the bushing well it shouldn't bind to much.
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Old 08-08-2013, 12:17 PM   #19
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I read the article. I guess it has me a little concern but a lot of people run poly on their DD too with no complaints. I guess its what you personally want out of your ride. I've read if you lube the bushing well it shouldn't bind to much.
no complaints but how often and how hard to those DDs drive their cars w/ poly bushings and do they have the appropriate spring rates/dampers to match?

Further, not sure how stiff you want the trailing arm to be. BMW designed it with a certain philosophy in mind that has defined the brand for 40 years+
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Old 08-08-2013, 12:22 PM   #20
saace7
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no complaints but how often and how hard to those DDs drive their cars w/ poly bushings and do they have the appropriate spring rates/dampers to match?

Further, not sure how stiff you want the trailing arm to be. BMW designed it with a certain philosophy in mind that has defined the brand for 40 years+

True... Very true.

Idk if my spring rates and dampers are right but they will be stiffer than stock so that will be a Plus for me while using poly.

Last edited by saace7; 08-08-2013 at 12:33 PM.
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