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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-04-2010, 04:27 PM   #1
Bimmer_J
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Clutch Upgrade

So its time for a new clutch. I really am not happy with the POS SAC that comes factory in the E46s.
I have been searching hi and low trying to figure out the whole M5 Clutch
setup that I have seen on several places.

My Question is this

What exactly is needed to do the conversion, and can it be done with just OE Parts?
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Old 02-04-2010, 05:14 PM   #2
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What's wrong with the stock clutch? You're not pushing high hp, so I really don't get it. I replaced my stock clutch with another stock clutch, no issues, and I've got quite a bit more power... What exactly do you expect to get out of an M5 clutch upgrade?
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Old 02-04-2010, 05:24 PM   #3
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People run the M5 clutch with a lightweight flywheel upgrade. UUC.
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Old 02-04-2010, 06:38 PM   #4
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Quote:
Originally Posted by AdamBath View Post
What's wrong with the stock clutch? You're not pushing high hp, so I really don't get it. I replaced my stock clutch with another stock clutch, no issues, and I've got quite a bit more power... What exactly do you expect to get out of an M5 clutch upgrade?
Whats not wrong with stock clutch? Are you kidding me? There is no constant point with it. Its extremely weak. It doesn't grab like it should. Its not really about my HP. I know enough to know that the stock 325 Clutch just doesn't work. Hence why I am trying to figure out alternatives to the stocker. On top of the fact that you may have more power there are some differences in the 330 clutch.

Quote:
Originally Posted by aggieE46 View Post
People run the M5 clutch with a lightweight flywheel upgrade. UUC.
Ok. So are there any Variations with that setup? Is it like a full OEM M5 clutch with a UUC flywheel or do they change some stuff to make it work in our cars? Also are there other types of clutches that will work? I am just trying to weigh all of my options here.
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Old 02-05-2010, 12:45 AM   #5
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I was wondering the same things about this m5 clutch swap. Sounds interesting.
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Old 02-05-2010, 01:21 AM   #6
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Quote:
Originally Posted by Bimmer_J View Post
Whats not wrong with stock clutch? Are you kidding me? There is no constant point with it. Its extremely weak. It doesn't grab like it should. ...
That sounds like the dreaded self-adjusting clutch pressure plate (do 325s have this same PP that 330s come with? I've driven the 330s with that self-adjusting clutch and yea it's a PITA since the engagement point is forever moving, and it's worse as the clutch wears with time).

In the spirit of this thread, might I add another useful question here since I too will be changing my clutch soon... How much power can the M5 clutch setup handle?
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Old 02-05-2010, 01:32 AM   #7
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Originally Posted by 95blkmax View Post
That sounds like the dreaded self-adjusting clutch pressure plate (do 325s have this same PP that 330s come with? I've driven the 330s with that self-adjusting clutch and yea it's a PITA since the engagement point is forever moving, and it's worse as the clutch wears with time).

In the spirit of this thread, might I add another useful question here since I too will be changing my clutch soon... How much power can the M5 clutch setup handle?
You have it backwards, the engagement point is constant with the SAC. Think about it, it self adjusts as opposed to a standard clutch with which the engagement point changes as the clutch wears. That said, I think what you are referring to is the fact that the feel isn't the same as a standard clutch.
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Old 02-05-2010, 03:43 AM   #8
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yeah i have driven a 350z and the clutch and shifter felt so much better
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Old 02-05-2010, 03:46 AM   #9
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In the spirit of this thread, might I add another useful question here since I too will be changing my clutch soon... How much power can the M5 clutch setup handle?
I've got the UUC 8.5 Flyw. & M5 clutch w/ performance disc. It's give or take 400 HP, if
I'm remembering correctly/pretty sure.
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Old 02-05-2010, 04:39 AM   #10
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I have 190k miles on my original pos sachs clutch. It only slips briefly on power shifts, and shudders a little on low rev(barely 1k rpm) move offs.

It would be nice to upgrade but for the money and my basic bolt ons its not worth it.
I still explored this upgrade thing tho, to see if I could do some mixing and matching. I've been told the E36 clutch is interchangeablen but compared to under $300 for a full sachs oe kit for our car, and a sachs oe e36 M3, it suddenly got expensive quick.

I'll be sticking another fine oem sachs clutch in there. It would be nice to get a slightly lighter flywheel, but I can't justify the price. Not without a boosted motor. I can think of several other ways to piss that kind of money away
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Old 02-05-2010, 09:27 PM   #11
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As for the SAC, I've never had a failure since 2004. For a period of time, the adjuster ring was made of plastic. I think that the PP changed to a steel adjuster ring around 2003. From there, the PP is pretty stout.
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Old 02-05-2010, 10:18 PM   #12
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As for the SAC, I've never had a failure since 2004. For a period of time, the adjuster ring was made of plastic. I think that the PP changed to a steel adjuster ring around 2003. From there, the PP is pretty stout.
My new stock clutch "feels better" and has been far more consistent than the factory original clutch ever was. I'm guessing this is due to the updated adjuster ring.
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Old 02-06-2010, 12:09 AM   #13
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My car is an 03 but idk. My previous car was a an 88 528e/i and the clutch feel was amazing compared to what it has been since I purchased the car. My brother has an 03 330ci and its got a bit of a difference in the feel of the clutch but he has the same problem Im having when even in power shifting it just slips. So im just thinking thats there's gotta be some different option to the stock clutch.
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Old 02-06-2010, 01:16 AM   #14
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http://www.uucmotorwerks.com/specials.htm
http://www.uucmotorwerks.com/flywheel/index.htm

Everything you need to know is on there.
Click on this --> 330/328/325/323 - 5 SPEED
Read everything down there. Should be a simple bolt on.



Info:

UUC customers have been using the Stage 2 & M5 clutch setup in turbo or supercharged E36 M3s and MZ3s with fantastic results. Our own testing has shown the M5 clutch to reliably handle in excess of 450hp.


Maintaining the reliability and over-the-counter availability of a BMW factory part.
Greater clamping force than standard 3-series clutch.
Elimination of the SAC mechanism.
Incorporates a sprung-hub design for quiet operation with a heavy-duty steel pressure plate


Technical features:


applications:
330 5-speed, 328, 325, 323 (all i, Ci, iT variants) E46 6-cylinder models with 5-speed transmission (1999-2004).
530i, 528i, 525i E39 5-series (1996-2003)
Z3 3.0i
models with manual transmission only.

construction:
CNC machined 6061-T6 aluminum

dowel pin hole:
enlarged like factory-fit.

friction plate:
replaceable, 1050 steel.

balancing:
11,000rpm and spin-burst tested to 14,000rpm. SFI CERTIFIED

weight:
8.5 lb

pressure plate,
throwout bearing
& clutch used:
'91 - '93 E34 M5 parts required.
BMW part # 21 21 2 226 428 (complete clutch kit)

source:
Made in USA

Available clutch components:

- OEM BMW M5 clutch kit
- UUC "Performance Organic"
- UUC "UltraSmooth CeraMetallic" (extreme power/ drag racing)
- UUC "Multi-Puck Ceramic" (extreme power / frequent drag racing)

click here for current pricing on these complete kits

All kits come complete with Stage 2 flywheel, pressure plate, clutch disk, and throwout bearing.


Professional installation recommended.
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