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The Showroom
This is the place to show off your BMW to other members of the community. Post pictures and videos of your car and the modifications you have done to it. If you need a picture of something on a coupe, sedan, convertible or touring you will probably find it here!

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Old 05-03-2010, 02:17 PM   #21
Mike@F1 AutohaŘs
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Badass setup you have there
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Old 05-03-2010, 03:17 PM   #22
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Quote:
It's a lot easier for a 330 than a 325. The axle shafts are thinner on the 325, which means the M3 ones won't fit 325 trailing arms. You can't bolt the 325 shafts to the M3 diff either because the M3 flanges have a larger diameter. I believe the 330 trailing arms will accommodate the M3 axles fine so you would only need the parts you listed (and miscellaneous things like the push rod). 330s also have a 6-bolt differential flange so you just use your OEM drive shaft. On the plus side, I did get a brake upgrade out of it.

Thanks!
Thanks for the input. You said Push Rod? Other thing, I will need is the M3 Rear Sway Bar.

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Old 05-03-2010, 06:47 PM   #23
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Thats awesome man, Id love to do this, To bad im saving my $$
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Old 05-03-2010, 06:48 PM   #24
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Quote:
Originally Posted by Drewdown View Post


This has to be like the only time ive ever seen a Kalim multi-quote
Lies.

Quote:
Originally Posted by Mike@F1 AutohaŘs View Post
Badass setup you have there
Thanks!

Quote:
Originally Posted by TrippinBimmer View Post
Thanks for the input. You said Push Rod? Other thing, I will need is the M3 Rear Sway Bar.

-TrippinBimmer

FYI: Mine is an AUTO as well FTW!
Yes, push rod (#12)

http://www.realoem.com/bmw/showparts...76&hg=33&fg=30

Good luck, man!

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Originally Posted by n2Bimmer View Post
Thats awesome man, Id love to do this, To bad im saving my $$
Thanks.
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i'd rather be gapless with no bulge
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Old 05-03-2010, 08:12 PM   #25
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congrats man welcome to the lsd club the non drug oriented one lol
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Old 05-04-2010, 01:37 AM   #26
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isnt it possible to just change the flanges on the diff? im curious because i am doing this swap in my 320i.. (which im soon putting an m54b30 in) but i got the m3 subframe diff and 330 trailing arms and control arms. but i was wondering if i could just change the input flange on the diff so my driveshaft wouldnt have to be modified
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Old 05-04-2010, 01:40 AM   #27
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Originally Posted by bigdog2003_99 View Post
congrats man welcome to the lsd club the non drug oriented one lol


Quote:
Originally Posted by rider-. View Post
isnt it possible to just change the flanges on the diff? im curious because i am doing this swap in my 320i.. (which im soon putting an m54b30 in) but i got the m3 subframe diff and 330 trailing arms and control arms. but i was wondering if i could just change the input flange on the diff so my driveshaft wouldnt have to be modified
That was my first suggestion when we got stuck on that part. We tried swapping the input flange but the non-M one didn't fit.

If you're using a manual transmission for your swap, the 330 drive shaft supposedly fits. I haven't verified this myself.
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i'd rather be gapless with no bulge

Last edited by cyberkaa; 05-04-2010 at 01:42 AM.
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Old 05-04-2010, 10:25 AM   #28
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is that a 5 speed 330 drive shaft that will fit?
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Old 05-04-2010, 11:47 AM   #29
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Quote:
Originally Posted by rider-. View Post
is that a 5 speed 330 drive shaft that will fit?
Yeas, that's the one I'm referring to.
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i'd rather be gapless with no bulge
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Old 05-04-2010, 12:47 PM   #30
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Old 05-04-2010, 11:22 PM   #31
rider-.
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Originally Posted by cyberkaa View Post
Yeas, that's the one I'm referring to.
can this be confirmed by anyone?
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Old 05-05-2010, 07:58 AM   #32
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NICE...Would like to do this one day!!
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Old 05-05-2010, 11:18 PM   #33
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Quote:
Originally Posted by rider-. View Post
can this be confirmed by anyone?
I found an old thread I used as a reference.
http://forum.e46fanatics.com/showthread.php?t=613741
According to that, you need the M3 drive shaft.

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NICE...Would like to do this one day!!
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Old 08-17-2010, 03:36 AM   #34
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So which of there parts you listed are REQUIRED to do the swap on a 330ci steptronic? I assume that everything that has to do with brake is optional right?

The M3 parts I had installed include:
-Trailing arms $$ 60
-Dust shields diff cover??
-Axles
-Calipers
-Caliper carriers
-Rotors
-Brake pads
-Brake pad wear sensor
-Subframe $$170
-Differential $$ 650
-E-brake
-Wheel bearings/hubs
-Rear sway bar $$ 60
-Drive shaft (modified for length and balanced) if from m3 $250 (plus the modding)
-U-brace a.k.a. push rod $$ 86 new + core
-A bunch of bushings

Last edited by richyboycaldo; 08-17-2010 at 03:57 AM.
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Old 08-17-2010, 07:45 AM   #35
cyberkaa
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Quote:
Originally Posted by richyboycaldo View Post
So which of there parts you listed are REQUIRED to do the swap on a 330ci steptronic? I assume that everything that has to do with brake is optional right?

The M3 parts I had installed include:
-Trailing arms $$ 60
-Dust shields diff cover??
-Axles
-Calipers
-Caliper carriers
-Rotors
-Brake pads
-Brake pad wear sensor
-Subframe $$170
-Differential $$ 650
-E-brake
-Wheel bearings/hubs
-Rear sway bar $$ 60
-Drive shaft (modified for length and balanced) if from m3 $250 (plus the modding)
-U-brace a.k.a. push rod $$ 86 new + core
-A bunch of bushings
The brakes are optional only if you reuse your 330 trailing arms. Upgrading to the M3 arms means getting M3 brakes unless you have custom caliper carriers made to fit the 330 brakes. That wouldn't be cost effective anyway.

So the question is, can you reuse your steptronic 330 trailing arms? Based on the what realoem says about the size of the wheel bearing, probably yes. It depends on whether or not the splines on the M3 output shafts match up to the 330 drive flange hubs. Here's a comparison:
http://www.realoem.com/bmw/showparts...38&hg=33&fg=40 (325)
http://www.realoem.com/bmw/showparts...38&hg=33&fg=40 (330)
http://www.realoem.com/bmw/showparts...38&hg=33&fg=40 (M3)

The 325 bearings are definitely smaller, but the M3 and 330 ones share common parts. The drive flange hubs are different part numbers, though, so I'm not 100% sure if the splines match up. However, since everything else is common, you can probably install M3 flange hubs on your 330 arms in the worst case. They're not fun to remove and replace, so maybe an upgrade to M3 trailing arms and brakes becomes attractive again at that point.

I mentioned M3 output shafts above because you would need output shafts that fit the 94mm output flange on the M3 diff. Realoem shows 86mm and 94mm axles, and I think the automatics unfortunately got the 86mm ones. You'd have to measure to confirm and get bigger axles if that's the case. If you can find the 94mm 330 axles (I'm guessing from a car with manual trans or zhp), then you don't even need to worry about the splines matching the drive flange hubs.

So the remaining parts that you need are:
-differential
-subframe
-rear sway bar
-modified driveshaft
-U-brace
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Quote:
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i'd rather be gapless with no bulge
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Old 08-17-2010, 02:09 PM   #36
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hmmmmmmmm i wonder whats still missing from going into the car already damn it
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Old 08-17-2010, 02:12 PM   #37
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Quote:
Originally Posted by kk325xi View Post
hmmmmmmmm i wonder whats still missing from going into the car already damn it


I'm reading up on MSS54.
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i'd rather be gapless with no bulge
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Old 08-17-2010, 03:05 PM   #38
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Originally Posted by cyberkaa View Post


I'm reading up on MSS54.


"reading up." Huh?
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Old 08-17-2010, 03:31 PM   #39
cyberkaa
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Quote:
Originally Posted by Drewdown View Post


"reading up." Huh?
BMW training docs. I need to pick up a Bentley manual, too.
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i'd rather be gapless with no bulge
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Old 08-17-2010, 07:21 PM   #40
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I'm reading up on MSS54.
lolwut?
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