school me on m5 clucthes for an s52

[dmjensen]

so i have a friend with a flywheel from his m5 he's willing to just give to me, my question is will that bolt up to my s52 or is that something else that you can bolt on from an m5?

thanks in advance :up:

[e46s54dr]

I think youre referring to the uuc e34 m5 clutch and light weight flywheel combo? In that case, your buddy's m5 flywheel wont work because the light weight flywheel in the uuc m5 clutch kit is specific. Its designed to work with the clutch and is different from a regular m5 flywheel.

[dmjensen]

bummer.. in that case nevermind

[Wanganstyle]

I think youre referring to the uuc e34 m5 clutch and light weight flywheel combo? In that case, your buddy's m5 flywheel wont work because the light weight flywheel in the uuc m5 clutch kit is specific. Its designed to work with the clutch and is different from a regular m5 flywheel.

actually you may want to rescind that statement.
One is a M30 setup, one is a UUC setup.

teeth are same on flywheel, so is stack height and spacing. clutch is direct plug and play interchange between the two. One is obviously Genuine OEM BMW and steel (and one piece)

[e46s54dr]

^ After revisiting uucmotorwerks site, you are correct sir. Looks like they are interchangeable after all. But I wonder why they list their stage 2 kits being compatible with:

M3, 328, 325, 323, 320 ( 1992-1999 E36 6-cylinder models)
M Roadster/Coupe (all including S54 engine)
Z3 2.8 (1996-1998 M52 engine)
525i (1992-1995 E34)
models with manual transmission only.

and not the e34 m5?

[e46s54dr]

Wanganstyle, do you know the total weight of the stock m30 flywheel and m5 clutch combo? I wonder if its significantly heavier than the stock s52 dual mass flywheel and clutch combo. It might be something to consider if ever boost my engine.

[Wanganstyle]

UUC can post whatever UUC wants to on UUC website*** :)



many people interchange e28m/e24/e32/e34 flywheels.

the total weight of pictured assembly from M30 engine was 29 lbs on my scale. the uuc setup weight is on the UUC website, I did not care to weigh it.

the S52 OEM dual mass fly/pp is ~ 32 lbs or so IIRC? It has been a while since I weighted one.

[e46s54dr]

True. That and I guess you cant really call it a stage 2 kit for an e34 m5 when all that is changed is the light weight fly wheel.

If the single mass m5 clutch kit is the same or even a bit lighter than the stock e36 m3 setup then its definitely a good upgrade. Especially if I ever plan on boosting my engine, the weight wouldnt be too much of a concern to me.

Thanks for your time and knowledge.

P.S. Any s54 Build Updates?:D

[Wanganstyle]

True. That and I guess you cant really call it a stage 2 kit for an e34 m5 when all that is changed is the light weight fly wheel.

If the single mass m5 clutch kit is the same or even a bit lighter than the stock e36 m3 setup then its definitely a good upgrade. Especially if I ever plan on boosting my engine, the weight wouldnt be too much of a concern to me.

Thanks for your time and knowledge.

P.S. Any s54 Build Updates?:D

hahaha ya, would be not really a "stage 2" for a e34M5; stock replacement clutch with an aluminum flywheel to loose some weight/drivability on hills is hardly an "upgrade" IMO for a high class saloon like an e34M

the e28M5 single mass fly and the e24 633i and 533i flywheel are the popular choices for the M30 crowd when looking for a single mass lighter than existing unit; owners of E32/E34 M5/525/735i cars like to install these

Price is also not bad, ~ $400 for a brand new OEM BMW solid steel flywheel from germany, can also be lightened if one has a fetish for not allowing anything to go un-touched.

S54 is hibernating........the alpina M20 will be coming out sooner than later as its job is almost complete !

s54 is not scheduled to go in yet......but something else very interesting (and pureblood BMW) with ITB's will take its place temporarily upcoming

[dmjensen]

i forgot i made this thread.. so im still lost, you can not use an e39 m5 flywheel in an s52?

[Rothinfeuer]

I took some time today to weigh the stock e28, e34, and e36 M clutch stacks.

from left to right

91' e34 S38B36 flywheel: 12# Total: 28#
88' e28 S38B35 flywheel: 14# Total: 30#
95' e36 S50B30 flywheel: 23# Total: 36#

[Leo_328i]

I took some time today to weigh the stock e28, e34, and e36 M clutch stacks.

from left to right

91' e34 S38B36 flywheel: 12# Total: 28#
88' e28 S38B35 flywheel: 14# Total: 30#
95' e36 S50B30 flywheel: 23# Total: 36#

Thats awesome!

Are they all exactly the same stack height, even the single-mass E28 setup?

[Wanganstyle]

Thats awesome!

Are they all exactly the same stack height, even the single-mass E28 setup?

I posted the above photograph of UUC stage 2 for e36M s52b32+ zf sg320 right next to a m30b34 e24 clutch stack :)


UUC single mass conversion kit for dual mass cars (e36M) is black. e24 clutch is OEM. same height :)

I'm not sure what the height of the OEM dual mass setup is, but obviously the UUC kit setup of fly+pp is sold to replace it; also the PP is interchange part number with e34M5.....so if the stack height is same and the pp is same the fly must also (be the same).

many people interchange e28 flywheels onto e34M5's - common modification.

[stefan]

When translating all these M-specific clutch/fw combos to non-M parts, am I right to assume that a m30b35 flywheel and clutch will fit my (euro) m52b25 and transmission?
I looked up the part number for the transmission in realoem, and it's the same transmission as for a EDM m50b20 and m50b25.

[Eric]

I'll be going with a JB flywheel next time, learned my lesson once.

http://www.r3vlimited.com/board/showthread.php?t=241519&highlight=uuc