Hey guys....Wut kind of clutch kits ru running????
and which one do u recomend to get???

What's wrong with stock? Easy to modulate, grips plenty for 300-350HP.

I have the factory clutch from an E34 M5 with a single mass steel flywheel and Sachs motorsport pressure plate.

Stock clutch should be fine.

Flywheel on the S50B32 weighs about 4.5 lb less than the S50B30 unit, and is a nice street upgrade for any M50 or S50B30 engine.

i would really love to get sth good as am already gonna be ordering even if it was the original one :(....(i hate that about UAE i have to order everyth)
i guess mine is going out bcz when i shift from 1st to 2nd very fast at high rpms i have slipping in my clutch. When i did the 5th gear test it seems that its not slipping at all :confused..... i dunno maybe it does it sometimes and doesnt some other times....

Ive been considering the M5 E34 clutch and UUC 8.5 lbs Flywheel combo, Ive heard its a great package for the S50B30, and it costs less than U$ 1000

I think im gonna go with this setup.

Ive been considering the M5 E34 clutch and UUC 8.5 lbs Flywheel combo, Ive heard its a great package for the S50B30, and it costs less than U$ 1000

I think im gonna go with this setup.

I have a friend that is running that setup, and it's pretty nice. I can't say that it's a major difference between stock and this, because before that, the clutch was slipping very bad

Ive been considering the M5 E34 clutch and UUC 8.5 lbs Flywheel combo, Ive heard its a great package for the S50B30, and it costs less than U$ 1000

I think im gonna go with this setup.

that is setup I have, damaged pressure plate on drag launches though, if not drag racing, it is great setup, if you are drag racing, flywheel is great, stronger pressure plate is a good idea (multi layer spring steel straps holding cast part to pressed steel cover required

Ive been considering the M5 E34 clutch and UUC 8.5 lbs Flywheel combo, Ive heard its a great package for the S50B30, and it costs less than U$ 1000

I think im gonna go with this setup.



Is this good for the S50B32 as well with the 6 speed tranny?

Is this good for the S50B32 as well with the 6 speed tranny?

I think it will work, but ive heard it chatters more on the 6 speed tranny, dont know why.

I think it will work, but ive heard it chatters more on the 6 speed tranny, dont know why.

We prefer to use the word "chatter" as some people confuse it with chattering engagement characteristiscs, which is a feeling and not a sound. It is appropriately called "rattle" or "rollover noise". Details on what causes gearbox rattle can be found here:

http://www.uucmotorwerks.com/flywheel/gear_rattle.htm

The UUC flywheel/clutch kits for the 5-speed are completely compatible with the 6-speed. Details on the UUC Stage2 aluminum flywheel can be found here:

http://www.uucmotorwerks.com/flywheel/LFWLE36SH.htm

6-speeds have more of a chance of residual gear rattle simply due to the longer main shaft causing more internal free play.

How bad is it? It varies from nonexistant to bothersome, based on many factors including initial build tolerances of your gearbox, wear characteristics through lifespan, and most importantly, what transmission fluid is used. Most cars fall into the less severe end of the spectrum.

Keep in mind that gearbox rattle only occurs in neutral with the clutch released, no other time.

We recommend a specific mix to minimize gearbox rattle:

http://www.uucmotorwerks.com/html_techtip/techtips/tranny_rattle.htm

If you are extremely concerned about the possibility of this situation, you can try our steel "moderate weight" flywheel. Comparing the weight of the entire rotating assembly, it still saves about 6lbs compared to the S50B32 unit... this will result in a performance tweak, a "lifetime" flywheel (original BMW flywheels should be replaced with every clutch - we all know that, right?), and the superior M5 pressure plate or our beefed-up performance versions.

Details on the UUC Stage2 Steel "moderate weight" flywheel can be found here:

http://www.uucmotorwerks.com/flywheel/LFWLE36SHST.htm

Hope that helps!

the stock clutch in the M3 s50b32 is not much chop if u drive with some spirit. I recently upgraded mine to a sachs paddle clutch plate, upgraded sachs pressure plate, and a lightweight 1 piece flywheel (12lb). Its a great setup, and works fine for the street, other than the clutch chatter at idle when warmed up, and the odd squeak when cold. I was gunna fit a sprung cluch plate but there wasnt the room. small price to pay for the reliability.

the "chatter" goes away around 1000rpm so i guess if it shits you, you can up the idle speed

what flywheel did you go for?

If you are extremely concerned about the possibility of this situation, you can try our steel "moderate weight" flywheel. Comparing the weight of the entire rotating assembly, it still saves about 6lbs compared to the S50B32 unit...

Is this similar to the 3.6L E34 M5 flywheel? That's what I have and it weighs about 16#... How much is just the flywheel itself? I only saw pricing for packages and i'm curious how it compares to the price of the OE unit.

Also, isn't a stock S50b32 flywheel about 4lbs lighter than an S52b32 flywheel?

Is this similar to the 3.6L E34 M5 flywheel? That's what I have and it weighs about 16#... How much is just the flywheel itself? I only saw pricing for packages and i'm curious how it compares to the price of the OE unit.

Nope, different. You should not use the BMW flywheel from the M5 because the starter ring tooth count is different (leading to premature starter wear/failure) and the stack height is different (incorrect engagement point).

Also, isn't a stock S50b32 flywheel about 4lbs lighter than an S52b32 flywheel?

Which are you comparing it to, US or Euro? There's no such thing as "S52B32". Euro motors are S50B30 and S50B32. US motors are simply S50 or S52.

- Rob

Nope, different. You should not use the BMW flywheel from the M5 because the starter ring tooth count is different (leading to premature starter wear/failure) and the stack height is different (incorrect engagement point).


I put a modified E36 ring gear on it. Also using an OE E34 M5 clutch disc and Sachs Motorsport PP on my Euro 6spd



Which are you comparing it to, US or Euro? There's no such thing as "S52B32". Euro motors are S50B30 and S50B32. US motors are simply S50 or S52.

- Rob

I know, I meant comparing the Euro flywheel to the US flywheel.

Technically US motor is S50US & S52US but I did not want you to think I was only referring to Euro motors since it was a cross-comparison.

I put a modified E36 ring gear on it. Also using an OE E34 M5 clutch disc and Sachs Motorsport PP on my Euro 6spd

Sounds like a bit of work involved. The UUC units are specifically made for the E36 application with the appropriate ring gear built in, and also feature a replaceable friction surface for future servicing.

I realized I missed answering your previous question about the cost. The UUC Stage2 flywheel in steel is figured into the kit at about $100 more than the aluminum Stage2, which simply reflects the increased materials and machining costs.

- Rob

Yeah it wasn't too bad for me but for someone who doesnt have access to the resources and equipment I do it would certainly be a PITA. Was unaware of your product at the time I chose mine, probably came out afterwards but it seems VERY similar without the extra work, so it sounds a good offering for those of us who dont always feel like being a race car driver :D (IMO the lighter flywheels make the car a little too 'manic' for my tastes and lose a bit of smooth civility)

what flywheel did you go for?


i got one machined locally. they have the CAD pattern now so they can replicate t, but delivery would be a killer:)

This is prob a super noob question but I am really new to the lightweight flywheel area. If I buy just the flywheel from UUC, and the e34 M5 clutch kit from my parts guy hookup, do I need anything else? I cant see on the UUC site where I would need anything else.

I would recommend you change the pivot ball as well

Hey guys,

Did anybody use the UUC Stage I Light Weight Flywheel 11.5lbs, M5 Spring Hub Disk, M3 pressure plate.
i am considering it for my car and i need to order a clutch with the coming three days. so please if anybody has any experiance with it please share it :)

Also if any body has anyother choise within the same price range 800$ that will be good for daily driving & Auto-X.

Thanks guys alot.

Hi, I got the M5 E34 clutch and UUC 8.5 lbs Flywheel combo from UUC, but I havent had the time to go ahead and istall it yet :(

I guess that you have the stage II clutch kit UUC offers, LWFW + M5 Disk + M5 Pressure plate.
I am looking into Stage I since it fits my budget :)