Will e34 S38 M5 flywheel work for manual trans swap?

[3nsahalee]

Recently picked up an excellent condition flywheel off a ‘90s era M5 for a song, thinking it would work for my ‘74 e9 auto/manual upgrade.
I’m planning on running triple webers, and have both the original m30 engine and an m90 from early euro 6’er that is already manual flywheel.
Should/can I use the e34 M5 flywheel on the m90 engine? The m90 was L-Jet originally.
I have a Getrag 5-spd, CoupeKing mount assembly, and all the ancillary parts, hopefully, ready to go.
Also, would e28/e24 M5/M6 clutch assembly be the way to go on this? I have the standard clutch setup,,, would it be sufficient for a sunny day weekend driver car?

Thanks for any input!
Steve

 

[Arde]

I have no idea how you can use the M90 with carbs, but I had an early Euro 6 with an M90 and I say go M90.

 

[sfdon]

You bought it first and now you want to know if it fits?

 

[OCCoupe]

e34 m5 has a dual mass flywheel where as the e28 and earlier cars use a single mass flywheel. The e28 m5 flywheel can be used with the m30 manual flywheel which is what you want.

 

[wkohler]

If you want a heavier flywheel, the late E28 535i flywheel works too. It’s 22lbs. I have several of both early and late (with or without the motronic 1.0 pin) and can ship out a freshly surfaced one. Wouldn’t run a dual mass, personally.

The E28 M5 clutch has more clamping force than the 535i clutch and as such more pedal effort. Unless you’re making considerably more power than a stock 10:1 M30 or an M90, I wouldn’t bother with the M5 clutch. M30 discs really never wear out, the pressure plates get stiff.

I guess I’d go with the M90 you have. Would be a great motor.

 

[3nsahalee]

e34 m5 has a dual mass flywheel where as the e28 and earlier cars use a single mass flywheel. The e28 m5 flywheel can be used with the m30 manual flywheel which is what you want.

Thanks for reply. See pics, pretty sure this is single mass.

 

[3nsahalee]

You bought it first and now you want to know if it fits?

Thanks, Don-
I know it fits. Not a concern there.
Just after insight from those more knowledgeable than myself on this flywheel / config with the triples.
This was included in a Parts Lot and, occasionally, I’ve been guilty of gathering spares I may never use.

- Be well, amigo!

 

[sfdon]

You need 2 more dowel pins

11221744338​

The USA

M5 e34 flywheel is unique in the bmw world.
no other model used it.

You will need a M throw out bearing

21512226729​