[LaYzEe]

Originally Posted by bmwmike

The next step I did was replacing the rear sway bar with the BMW M-sport 14 mm. Since this is a sway bar discussion, this is where I’m getting to the point. Immediately I noticed the car holding flat in up to moderate cornering speeds. But if you exceeded moderate speeds the sway would give way. Keep in mind I had worn shocks at the time. I'm in no way an expert driver or know anything about this stuff, but in the general driving I do, I noticed a noticeable difference with the M-sport rear sway. In this situation with my worn shocks, a larger bar would not have given out as early in corners.

When you say moderate cornering speeds, u mean doing 35-55mph and the cars still well planted to the road?

[scottmc129]

A new performance kit just came out that is replacing the old one. Evan from Tischer is saying that it comes with a 26.55mm FRONT sway bar and required yellow springs. it seems they have deleted the 14mm rear sway i assume because it will work with the E92 and face lifed E90. I am wondering did they find this to be a better set up or just a compromise for the coupe??? should i still order the rear sway with this new set up? any help would be great.
FYI...they are charging more and Evan is claiming it is lowered by 1/2 inch more then the previous performance kit.

here is the link to the new BMW Performance kit.http://www.e90post.com/forums/showth...suspension+e90

[Mr. 5]

Originally Posted by scottmc129

A new performance kit just came out that is replacing the old one. Evan from Tischer is saying that it comes with a 26.55mm FRONT sway bar and required yellow springs. it seems they have deleted the 14mm rear sway i assume because it will work with the E92 and face lifed E90. I am wondering did they find this to be a better set up or just a compromise for the coupe??? should i still order the rear sway with this new set up? any help would be great.
FYI...they are charging more and Evan is claiming it is lowered by 1/2 inch more then the previous performance kit.

here is the link to the new BMW Performance kit.http://www.e90post.com/forums/showth...suspension+e90

Replacing the rear sway is your choice, but I would recommend it since they are already there.
The dampers are the same, but they are just selling the springs now with the dampers.
Before, Tischer didn't know that the springs were different than the ZSP springs.

If you open the pdf in the link, you will see that it gives you the option of replacing the bar.

[scottmc129]

Originally Posted by Mr. 5

Replacing the rear sway is your choice, but I would recommend it since they are already there.
The dampers are the same, but they are just selling the springs now with the dampers.
Before, Tischer didn't know that the springs were different than the ZSP springs.

If you open the pdf in the link, you will see that it gives you the option of replacing the bar.

Evan explained to me that that damper part numbers have changed, eluding to a change in performance.

if nothing has changed, why is this now available for the coupe where the old set up was not?

[Mr. 5]

Originally Posted by scottmc129

Evan explained to me that that damper part numbers have changed, eluding to a change in performance.

if nothing has changed, why is this now available for the coupe where the old set up was not?

Ask Tischer. I don't know about the coupe.
All I'm saying is that you can still just purchase the dampers if you want.
Or, you can purchase only the dampers and springs.
I'm sure there's no push where you have to replace the sway.
I'll bet that the sway that's provided is the sport suspension sway and not the regular sway.

This is pasted from the pdf:

Ordering instructions
When ordering coil springs, note the special accessories code (SZ code) front and rear.��
The coil springs at the front and rear (see EPC for part number and further details; SZ code SZP5A) are not supplied in the retrofit kit and must be identified using the spring table in the EPC and ordered separately.

For E87 only: The tension strut (part no. 33 30 6 778 243) and various required fastening parts also need
to be installed. These are not part of the retrofit kit and must be ordered separately.

Only for E90 built before 03/06: The front supporting bearings (part number and instructions, see EPC) also need to be replaced. These are not part of the retrofit kit and must be ordered separately.

Only for E90 / E92 with M sport chassis: The rear stabiliser (part no. 33 55 6 764 425) and the rubber bearing (part no. 33 55 6 761 002) need to be exchanged. These parts are not part of the retrofit kit and must be ordered separately.

The M3 sway is a different part number but from what I understand, the diameter is the same and therefore no difference in performance.
Maybe it connects differently.

[Gen_E92]

Originally Posted by Mr. 5

The M3 sway is a different part number but from what I understand, the diameter is the same and therefore no difference in performance.
Maybe it connects differently.

you mean the M Sport sway? M3 use 20mm LOL

[Mr. 5]

Originally Posted by Gen_E92

you mean the M Sport sway? M3 use 20mm LOL

No, I was talking about the M3 front sway.
It's still 26.5, but it has a different part number.

[stressdoc]

It supposedly has a somewhat different shape. IMO, go Hotchkis or UUC for your front sway.

I could never figure out what the gig was with the Perf set being only for the E90. There was no good reason that I could discern why it wouldn't work on the E92. Bizarre that they would release the initial kit just for the E90. Anyway, here we are, BMW Perf has a "package" and they don't seem inclined to sell it piecemeal. Check out RealOEM. My Perf (old kit) stuff is getting installed as we speak, and I will finally contribute my 2¢ worth tomorrow.

Another bit of info is that the new kit lowers the car by 1.5cm. But given that they are using the same Perf springs, I don't see how that would be different.

And no change in the rear sway? I guess Orb was not consulted. The install will be cheaper anyway.

[jah29]

It's been mentioned lots of times in this forum that the M3 and 335i share the same size front anti-sway bar. When I double checked the part numbers I noticed that the M3 sway bar brackets and bushings are different.

http://www.realoem.com/bmw/showparts...04&hg=31&fg=10

Let's assuming the M3 parts are stiffer and stronger, right?

Does anybody know if the bushings and brackets fit on our cars? Harold? Orb?

thanks,
justin

[spacedogg]

Ugh...reading this thread...I'm more confused than helped! :S LOL.

I remember when most people here were just recommending to get only rear sways done (and not the front). And that the biggest bar they can fit was best. Clearly it seems this is not the case and some more careful thought must be laid out. Things were much simpler back then.

I'm debating about going for a LSD upgrade in about a year from now. Ideally that is a good time to do a rear sway bar install while the rear is dropped. Which of the bars out on the market would you guys recommend to be paired to a LSD?

Also can someone try to explain again why we should try to keep closely as possible to the OEM front/rear biasing? I was thinking of getting the UUC SwayBarbarians front and rear...but that would put the biasing at 75%/25%...not as extreme as the H&R setup but still pretty extreme relative to the others. The UUC SwayBarbarians are adjustable...so how does that factor in the numbers thrown around on this thread?

Thanks guys!

[HP Autosport]

Originally Posted by spacedogg

Ugh...reading this thread...I'm more confused than helped! :S LOL.

I remember when most people here were just recommending to get only rear sways done (and not the front). And that the biggest bar they can fit was best. Clearly it seems this is not the case and some more careful thought must be laid out. Things were much simpler back then.

I'm debating about going for a LSD upgrade in about a year from now. Ideally that is a good time to do a rear sway bar install while the rear is dropped. Which of the bars out on the market would you guys recommend to be paired to a LSD?

Also can someone try to explain again why we should try to keep closely as possible to the OEM front/rear biasing? I was thinking of getting the UUC SwayBarbarians front and rear...but that would put the biasing at 75%/25%...not as extreme as the H&R setup but still pretty extreme relative to the others. The UUC SwayBarbarians are adjustable...so how does that factor in the numbers thrown around on this thread?

Thanks guys!

Go with Hotchkis, it's lighter and gives you a more balanced handling. You don't need all the adjustability.

[patrickleung]

Wow....... I am new to CAR, so sorry that i don't understand much what's going on!
1) What is Front/Rear Biasing, The even the better?
2) I want to install a sway bar in my brother's e90 325i sport one, he is not going to change his suspension. What combo he should use in the rear sway bar if i don't want to buy the front as well?

[LaYzEe]

Originally Posted by Mr. 5

Only for E90 / E92 with M sport chassis: The rear stabiliser (part no. 33 55 6 764 425) and the rubber bearing (part no. 33 55 6 761 002) need to be exchanged. These parts are not part of the retrofit kit and must be ordered separately.[/I]

Tried searching for it but cant seem to find it...how big is this rear sway thats needed to be exchanged when buying the new perf package?

Also, its says with M sport chassis, so is that just for euro cars? usa cars? both?

[LaYzEe]

ok nm, found it:



No. Description Supplement Qty From Up To Part Number Price Notes
01 Stabilizer, rear D=13MM 1 33556764425 $101.56
02 Stabilizer rubber mounting D=13MM 2 33556761002 $20.65
03 STABILIZER SUPPORT 2 01/2007 33551096697 ENDED
03 STABILIZER SUPPORT 2 33556780707
04 Hexagon screw with flange M8X20-10.9-ZNS3 4 07119905070 $0.36
05 Stabilizer link 2 33556764428 $42.97
06 Hex bolt with washer M8X45-8.8-ZNS3 2 07119903931
07 Hex nut with plate M10 ZNS3 2 10/2007 31356757707 $0.56
07 Hexagon nut with collar M10-10 ZNS3 2 10/2007 33326768884

[Mr. 5]

It wouldn't be a bad idea to go bigger than the 13mm bar.
The M bar is 14mm
The e93 bar and Xi bars are 15mm
The M3 bar is 20mm.

Originally Posted by LaYzEe

ok nm, found it:



No. Description Supplement Qty From Up To Part Number Price Notes
01 Stabilizer, rear D=13MM 1 33556764425 $101.56
02 Stabilizer rubber mounting D=13MM 2 33556761002 $20.65
03 STABILIZER SUPPORT 2 01/2007 33551096697 ENDED
03 STABILIZER SUPPORT 2 33556780707
04 Hexagon screw with flange M8X20-10.9-ZNS3 4 07119905070 $0.36
05 Stabilizer link 2 33556764428 $42.97
06 Hex bolt with washer M8X45-8.8-ZNS3 2 07119903931
07 Hex nut with plate M10 ZNS3 2 10/2007 31356757707 $0.56
07 Hexagon nut with collar M10-10 ZNS3 2 10/2007 33326768884

[LaYzEe]

yeah, im thinking about the 15mm e93 rear sway bar now...

i never knew the e93/xi's had a larger rear sway bar

[Hit_Apex]

Originally Posted by jah29

It's been mentioned lots of times in this forum that the M3 and 335i share the same size front anti-sway bar. When I double checked the part numbers I noticed that the M3 sway bar brackets and bushings are different.

http://www.realoem.com/bmw/showparts...04&hg=31&fg=10

Let's assuming the M3 parts are stiffer and stronger, right?

Does anybody know if the bushings and brackets fit on our cars? Harold? Orb?

thanks,
justin

The M3 bars and hardware are a direct boltin. The M3 bars use what BMW calls "rubber bearings" and are far superior than rubber or even poly in terms of rigidity. This causes the bar to act stiffer than its size would indicate and greatly improves initial turn-in. Furthermore, the non-M front bar is not a continuous diameter and reduces to around 20mm in the center.

[HP Autosport]

Originally Posted by patrickleung

Wow....... I am new to CAR, so sorry that i don't understand much what's going on!
1) What is Front/Rear Biasing, The even the better?
2) I want to install a sway bar in my brother's e90 325i sport one, he is not going to change his suspension. What combo he should use in the rear sway bar if i don't want to buy the front as well?

No front bar upgrade? You an do the E90 M3 rear bar only.

[T7R_Sky]

How much stiffer is the M3 front sway bar compared to stock? Like percentage wise, any idea? Like 40%? 50%?
Or can someone give me an estimate?

[flukey]

im about to pair up an H&R rear sway with a UUC front sway.

i have to go with the UUC front sway because im an xi and they are the only company producing one for the awd models...

this post indicates the front UUC non-xi version:

26.95 mm (im making an assumption the xi front model is similar in size)

this post indicates H&R front is:

27 mm

since the front UUC front sway is nearly identical in diameter to the H&R front sway bar, can i assume that the UUC front sway should be compatible with the H&R rear sway?

is it an issue that the bushings are different for each?

thanks!

[asian010]

i just want to clarify some confusion i have. so i have the m-sport package on my 2010. does that men i have the 14mm m sport rear sway opposed to the 13mm zsp rear sway?

[asian010]

anyone?