M50 alum Flywheel-clutch with G260 tranny OK?

[e30strokr]

so Im in a mental block, cant source a single mass '325i" flywheel for cheap so im about to pull the trigger on a lightening SM M50 flywheel with clutch to mate with a manual G260 for my swap, seems it seems M50 people use the M20 clutch kit so I should be OK with this? let me know thanks

SACHS-STAGE 3 HD CLUTCH KIT+ALUMINUM FLYWHEEL Fits 92-98 BMW 325 328 M50 M52 E36 | eBay

[moatilliatta]

Id stick to steel/ chromoly flywheel on a street car. It'll keep harmonics down and transmission form rattling.

[e30strokr]

Id stick to steel/ chromoly flywheel on a street car. It'll keep harmonics down and transmission form rattling.

thanks for the advice..

[jbontke]

https://racehead.com.au/product/bmw-light-flywheel-m20/

[e30austin]

with the differences in bell housing depths, i'm going to go out on a limb and say they are not compatible. i would recommend sticking with the clutch and flywheel that matches the transmission you have.

[e30strokr]

with the differences in bell housing depths, i'm going to go out on a limb and say they are not compatible. i would recommend sticking with the clutch and flywheel that matches the transmission you have.

that does ring a bell.. I seen that some M50 people use the M20 clutch as an "Upgrade" ?!?!

thanks for the info

[Northern]

Some early Etas had a deeper bellhousing (maybe would need that 323i TOB?), but late model G260 should be PNP with M5x stuff?

Take this with a grain of salt, but I think all the 24v and late M20 clutch stack heights are ~the same?
The TOB is the same part though, and I have an S52 FX racing Chromoly flywheel/S52 clutch and OEM TOB and it seems to fit.
Starter to match the flywheel
Slave cyl to match the trans

I can't imagine the M20 clutch is much of an upgrade, dropping from 240mm to 228mm, unless it's just for a cheap flywheel solution.

[e30strokr]

Some early Etas had a deeper bellhousing (maybe would need that 323i TOB?), but late model G260 should be PNP with M5x stuff?
Take this with a grain of salt, but I think all the 24v and late M20 clutch stack heights are ~the same?
The TOB is the same part though, and I have an S52 FX racing Chromoly flywheel/S52 clutch and OEM TOB and it seems to fit.
Starter to match the flywheel
Slave cyl to match the trans

I can't imagine the M20 clutch is much of an upgrade, dropping from 240mm to 228mm, unless it's just for a cheap flywheel solution.

thanks for the response .. mine is a 88 SETA late model, I also heard the TOB should be of the M50 to fix the "deep issue" on the bell housing, I am so close to getting this finish and this along with it might being an M52 block is throwing me off for a bit...

hopefully when all this is done I can update the smog/M50/m52 forums ;) lol

[e30austin]

SETA (or anything with the twin mass or oversized single mass flywheel) had the deep bellhousing, FWIW.

[e30strokr]

SETA (or anything with the twin mass or oversized single mass flywheel) had the deep bellhousing, FWIW.

I was told using the M50 TOB should help that issue..?

[e30austin]

I was told using the M50 TOB should help that issue..?

can't tell you either way, because i've never done that, but just letting you know you have the deep bellhousing.

[e30strokr]

can't tell you either way, because i've never done that, but just letting you know you have the deep bellhousing.

thanks for the advice/info

[jbontke]

The TOB is the same part though, and I have an S52 FX racing Chromoly flywheel/S52 clutch and OEM TOB and it seems to fit.

Is this FX racing the same brand I see on eBay? I have an s52 from an auto and need Flywheel/TOB/Clutch/pilot bearing/flywheel bots... pretty much a kit that is for sale for a good price.

[Northern]

Is this FX racing the same brand I see on eBay? I have an s52 from an auto and need Flywheel/TOB/Clutch/pilot bearing/flywheel bots... pretty much a kit that is for sale for a good price.

Yes, that's where I've bought mine. I've seen the kits go as cheap as $240usd, but that was before COVID times...
I think a dozen others sell the same flywheel in their kits also and I'm not sure if there's a difference in the rest of the kit.
I bought the Stage 3 setup and it came with an Sachs S52 clutch that I could see the etched part number through the blue paint.

The TOB and pilot bearing I'd say are worth throwing in the bin and buying something OEM. A few people have had problem with them, and once I had the two side by side, the FX TOB felt really cheap.

I planned to turbo the car, so I went with the stage 3, but I know a guy who does autox/lapping with his M3 and he as like 5 years without issues on the stage 2.
Also drifting/clutch kicking seems to destroy the stage 3 clutch quickly.

It came with flywheel bolts, which I used with loctite. They're 10.9 instead of 12.9 but I've put ~350whp through them for a while with no issues.

Don't forget a new pivot pin, I used a new stock plastic one.

[jbontke]

Don't forget a new pivot pin, I used a new stock plastic one.

Is this a part for the clutch fork?