What is the Right P/N for Performance Springs

[3002 tii]

Retrofit kit: 33500444831

Front Springs, I see 3 variations:
31336788891
31336788892
31336788893

and for the Rear springs, I see 2 variations:
33536788898
33536788899


I believe Retrofit kit comes down to whether or not you have a 128i / 128i M-sport / 135i (which by default has M-sport). If you don't have M-sport, you have to purchase the Retrofit kit that includes an additional rear sway bar. Those with M-sport retain their factory rear and only receive a front sway replacement.

For springs, that's where it gets complicated. Comparing what others have received based on their model, I gathered the following part numbers based on year/trim/trans:

2008 N54 Step: 31336788893 / 33536788899 - M2
2011 N55 DCT: 31336788893 / 33536788899 - CWG
2012 N55 DCT: 31336788892 / 33536788898 - John_01

I couldn't find anyone who had front spring P/N 31336788891 but that's what Turner includes for their package.

If there are others here who've purchased the PS kit, can you post the P/N you received based on your model, and confirm whether or not you had the parts guy look up your VIN (as opposed to buying a prepackaged from say Turner)?

[3002 tii]

If anyone is wondering, I am looking for the correct springs for a 2013 N55 DCT.

[ShocknAwe]

This is what I found for springs:

BMW Performance Suspension Spring / Front 31336788891
BMW Performance Suspension Spring / Rear 33536788898


Straight from BMWUSA. These also look like the same P/Ns that Turner advertises.

Note:
33500444832 is for the whole kit.

[gregthegr8]

This may (or may not) help. When you click through on the getbmwparts link, it shows the suspension, then below that shows the springs only, but then doesn't list the part #s on the springs. You may want to e-mail them and ask as they're pretty knowledgeable and probably can get you the answer.

http://www.1addicts.com/forums/showthread.php?t=866098

[scoobysnax]

I have a 2012 135i 6MT.

P/Ns for my springs ordered from getbmwparts.com:

Front: 31336788892
Rear: 33536788899

[Dackelone]

The correct springs depends on your car's options. You have to look up the springs on RealOEM.com with your VIN(last seven digits), then you will find the correct part numbers.

[3002 tii]

Originally Posted by Dackelone

The correct springs depends on your car's options. You have to look up the springs on RealOEM.com with your VIN(last seven digits), then you will find the correct part numbers.

Thanks Dack but don't think realoem can actually decode this. I've even called few reputable vendors but none could figure it out. I just plan on ordering through Tischer just to be safe.

[Dackelone]

Originally Posted by 3002 tii

Thanks Dack but don't think realoem can actually decode this. I've even called few reputable vendors but none could figure it out. I just plan on ordering through Tischer just to be safe.

So... when you input your VIN on this page...

http://realoem.com/bmw/select.do


And THEN go to look up the Perf Springs it still shows three different part numbers?

Yea... I am sure Jason Tischer can fix you up with the correct springs for your car.

[3002 tii]

Originally Posted by Dackelone

So... when you input your VIN on this page...

http://realoem.com/bmw/select.do


And THEN go to look up the Perf Springs it still shows three different part numbers?

Yea... I am sure Jason Tischer can fix you up with the correct springs for your car.

Yea I'm waiting to hear back from those guys, in the meantime here's a screenshot of realoem unless I'm looking at the wrong place

[ShocknAwe]

FWIW when I was looking at the performance springs I went through Phil @ Reeves BMW. He used my VIN to find the right ones. I didn't get them but I appreciated the good service as always. Might want to give him a shout. Maybe see if he can beat Tischers price.

[Dackelone]

Originally Posted by 3002 tii

Yea I'm waiting to hear back from those guys, in the meantime here's a screenshot of realoem unless I'm looking at the wrong place

No, you have to load your VIN in that link I gave you. It's in the beginning screen/page for RealOEM.com Once you load your VIN, then RealOEM.com knows what model and build date your car is. THEN look up your parts.


http://realoem.com/bmw/select.do

Enter your BMW Serial Number (last 7 digits of your VIN) OR use the search options below.

Serial Number:

I think you are just looking up the parts - and going to that page. You will not see a place to enter your VIN using that method. You have to enter your VIN on the beginning webpage.

[3002 tii]

Originally Posted by Dackelone

No, you have to load your VIN in that link I gave you. It's in the beginning screen/page for RealOEM.com Once you load your VIN, then RealOEM.com knows what model and build date your car is. THEN look up your parts.


http://realoem.com/bmw/select.do




I think you are just looking up the parts - and going to that page. You will not see a place to enter your VIN using that method. You have to enter your VIN on the beginning webpage.

Sorry Dack but I've used realeom numerous times and I always start with the VIN. Unless I'm missing something, that screenshot is how it appeared on my end. More than happy to PM you the last 7 of my VIN if you think I'm doing it wrong lol.

[Dackelone]

Originally Posted by 3002 tii

Sorry Dack but I've used realeom numerous times and I always start with the VIN. Unless I'm missing something, that screenshot is how it appeared on my end. More than happy to PM you the last 7 of my VIN if you think I'm doing it wrong lol.

Ok, now I see what the problem is... its something with RealOEM.com

I used my VIN and tried to look up the Perf Springs. RealOEM says that is something that wasn't installed on my car(VIN). I only see the Perf Suspension kit listed as an available option. So looks like a dealer like Tischer is your best bet to fond out which Perf Springs your car needs.


Dackel

[tjswarbrick]

Amazing Necro Thread Revival!

I got so confused by all the BMW PS Springs out there that I went ahead and picked up a set of Swift Spec-R springs to pair with Koni Yellows and an E92 M3 FSB for my 2012 E88 6MT M-Sport 135i. Which is my DD - and will likely never see a track day. (Did a BMWCCA CCC right after installation and they were awesome.)
When the road is decent and I'm by myself, I love, love, love them.
However:

Ride height is a little too low. On a coupe with lots of camber, beefy rubber, and some deep-offset wheels I think they would look amazing. On my convertible with stock (261) rims, 225/245 Super Sports, -1.5deg camber, and only 12mm front spacers the look is a little juvenile.

I scrape on the occasional driveway and speed bump when delivering my kids to their playdates.

More senior passengers get startled as they are jostled by expansion joints and other full-width road imperfections.

So, I'm thinking that, unfortunately, my life is not as hardcore as I would like to believe and I'd likely be better served by a set of BMW PS Coil Springs with the Konis, FSB, and MPSS.

Trouble is figuring out which ones.
I don't see any references to putting PS springs on an E88.
RealOEM seems to have removed all references to individual coil springs for our cars.
ECS, Turner and Tischer have reference to 31336788891, 8892, 8893 & 8894 Front and 33536788898, 8899 & 8900 Rear springs for various E82's.
Is there any way to know the differences between the various spring choices before trying to order a set? Do they differ significantly in spring rate, length, or preload such that one set will work particularly well for my car and another might not work at all?

For the most part, the aftermarket sets (Cobb, Dinan, H&R, Eibach, Swift) list one P/N for the E82, and they happen to fit on the E88.

Which F/R BMW PS Coil Springs do I want for my DD / Backroads Dancer Ultimate Driving/Tanning Machine?

[titium]

Originally Posted by tjswarbrick

Amazing Necro Thread Revival!

I got so confused by all the BMW PS Springs out there that I went ahead and picked up a set of Swift Spec-R springs to pair with Koni Yellows and an E92 M3 FSB for my 2012 E88 6MT M-Sport 135i. Which is my DD - and will likely never see a track day. (Did a BMWCCA CCC right after installation and they were awesome.)
When the road is decent and I'm by myself, I love, love, love them.
However:

Ride height is a little too low. On a coupe with lots of camber, beefy rubber, and some deep-offset wheels I think they would look amazing. On my convertible with stock (261) rims, 225/245 Super Sports, -1.5deg camber, and only 12mm front spacers the look is a little juvenile.

I scrape on the occasional driveway and speed bump when delivering my kids to their playdates.

More senior passengers get startled as they are jostled by expansion joints and other full-width road imperfections.

So, I'm thinking that, unfortunately, my life is not as hardcore as I would like to believe and I'd likely be better served by a set of BMW PS Coil Springs with the Konis, FSB, and MPSS.

Trouble is figuring out which ones.
I don't see any references to putting PS springs on an E88.
RealOEM seems to have removed all references to individual coil springs for our cars.
ECS, Turner and Tischer have reference to 31336788891, 8892, 8893 & 8894 Front and 33536788898 & 8899 Rear springs for various E82's.
Is there any way to know the differences between the various spring choices before trying to order a set? Do they differ significantly in spring rate, length, or preload such that one set will work particularly well for my car and another might not work at all?

For the most part, the aftermarket sets (Cobb, Dinan, H&R, Eibach, Swift) list one P/N for the E82, and they happen to fit on the E88.

Which F/R BMW PS Coil Springs do I want for my DD / Backroads Dancer Ultimate Driving/Tanning Machine?

Buy the sleeves for the front konis and get custom swift springs. Then you can choose your own rates and lengths as well as set the ride height as you'd like.

[tjswarbrick]

Originally Posted by titium

Buy the sleeves for the front konis and get custom swift springs. Then you can choose your own rates and lengths as well as set the ride height as you'd like.

Seems like a decent plan, but the Coilover Conversion Kit is nearly $1k in parts, and doesn't even include springs or installation. I'm just looking for a set-it-and-forget-it suspension which is a little more street-able than Swifts over Yellows.

[John_01]

Originally Posted by tjswarbrick

ECS, Turner and Tischer have reference to 31336788891, 8892, 8893 & 8894 Front and 33536788898, 8899 & 8900 Rear springs for various E82's.
Is there any way to know the differences between the various spring choices before trying to order a set? Do they differ significantly in spring rate, length, or preload such that one set will work particularly well for my car and another might not work at all?

AFAIK BMW do not provide this information. However I have ordered 4 different performance springs.

33536788898 T1 Performance Rear
Length = 310mm, 8.5 effective turns, 13.7mm wire. Estimated rate = 390lb/in

33536788899 T2 Performance Rear
Length = 310mm, 8.5 effective turns, 14.0mm wire. Estimated rate = 420lb/in

31336788892 T2 Performance Front
4.0 effective turns, 12.4mm wire, Estimated rate = 146lb/in

31336788893 T3 Performance Front
4.0 effective turns, 12.7mm wire, Estimated rate = 160lb/in

The springs I have ordered were identical apart from the wire gauge.

Originally Posted by tjswarbrick

Which F/R BMW PS Coil Springs do I want for my DD / Backroads Dancer Ultimate Driving/Tanning Machine?

The "T3" Front springs will probably work on your car with the correct bump stops. For the rear, the performance springs are probably too light and may end up with the incorrect ride height. I guess you probably want a spring with around 550lb rate for the rear, and would need coilover-style adjustable rear spring perches to set it up for the correct ride height.

[titium]

Originally Posted by tjswarbrick

Seems like a decent plan, but the Coilover Conversion Kit is nearly $1k in parts, and doesn't even include springs or installation. I'm just looking for a set-it-and-forget-it suspension which is a little more street-able than Swifts over Yellows.

I priced it at 1k AUD delivered to Australia for parts including springs

[tjswarbrick]

Originally Posted by John_01

AFAIK BMW do not provide this information. However I have ordered 4 different performance springs.

33536788898 T1 Performance Rear
Length = 310mm, 8.5 effective turns, 13.7mm wire. Estimated rate = 390lb/in

33536788899 T2 Performance Rear
Length = 310mm, 8.5 effective turns, 14.0mm wire. Estimated rate = 420lb/in

31336788892 T2 Performance Front
4.0 effective turns, 12.4mm wire, Estimated rate = 146lb/in

31336788893 T3 Performance Front
4.0 effective turns, 12.7mm wire, Estimated rate = 160lb/in

The springs I have ordered were identical apart from the wire gauge.


The "T3" Front springs will probably work on your car with the correct bump stops. For the rear, the performance springs are probably too light and may end up with the incorrect ride height. I guess you probably want a spring with around 550lb rate for the rear, and would need coilover-style adjustable rear spring perches to set it up for the correct ride height.

Awesome!
That's the kind of info I knew I could rely on this place for.

I found an additional rear spring - 33536788900.
Read a thread yesterday where somebody got those for his 1. Most sites don't list fitment; one says it's for the E90 3-er. I think it's the T3 rear.

31336788894 comes up as another Performance Front. I imagine it's the T4.
Will start digging a bit more - see if I can confirm dimensions and rates for these, and see if there's a T4 rear. If so, that just might do the trick for me.
Then I gotta figure out if I can handle the swap (have 2 jacks and an unused set of Schwaben spring compressors), or if I need to pay somebody just to swap the springs. I'm very happy with everything else.

When I had the dampers and springs installed, they also hooked me up with Z4 rear and "Shortened M3" front bump-stops.

[tjswarbrick]

Been digging deep on this. BMW actually makes 4 front and 5 rear Performance springs for the E82/E90/E92/E93 platforms.
Looks like they spec the lighter ones for lightly optioned 6MT N55 and N/A E82's, and go heavier (thicker gauge wire) as options and vehicle weights go up. But they don't mention anything for the E88.

Back-of-the-napkin calculations appear that T4 front and either T4 or T5 rear springs actually approach the stiffness of my Swift Spec-R's, but with a bit more ride height and travel.

I'd like to know if anybody has experience with these on their 1- or 3-series car, and maybe took measurements of them. In particular, wire diameter. (Based on what I've uncovered, I gotta assume mean coil diameter, number of active coils, and and length of the springs is the same. All else being equal, using thicker wire gives a higher spring rate.)

If you have some, have any experience, or have found a thread here or on E90post discussing the size or rate of the higher "T" Performance springs, it would be most appreciated!

(I have asked Turner and ECS, and am awaiting a recommendation from Tischer. If I get anything good out of it, I'll update here.)
Thanks!

[tjswarbrick]

From Tischer:

"...the BMW Performance Suspension is not compatible with the E88 convertible models..."

From ECS:

We recommend the following: 33536788899 (T2 Rear) and 3133678891 (T1 Front.)

Based on that, installed Koni dampers. and my experience with the Swift springs - I am really tempted to order 31336788893 T3 Fronts and 335367888901 T4 Rears.
But will see what (if anything) Turner comes back with.

[Kevindshea]

Originally Posted by tjswarbrick

From Tischer:

"...the BMW Performance Suspension is not compatible with the E88 convertible models..."

From ECS:

We recommend the following: 33536788899 (T2 Rear) and 3133678891 (T1 Front.)

Based on that, installed Koni dampers. and my experience with the Swift springs - I am really tempted to order 31336788893 T3 Fronts and 335367888901 T4 Rears.
But will see what (if anything) Turner comes back with.

Does anyone have part# or veh info for T5 rear springs?
I have 2011 328i RWD 6MT wagon loaded Nav comfort access heated seats rear window shades etc.... I’m considering T3 fronts / T4 rears even though they are not recommended for E91.