mFactory SMFW- sprung or solid clutch?

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n54

New Member
Nov 5, 2016
2
New Zealand
How much power are you putting through it? The 335is clutch is another option if you don't exceed ~500WTQ. I've had good results with it.
 

DR-JEKL

Private
Jan 16, 2017
34
Since you're going from a DMF (with springs) to a SMF (with no springs) you'll want a sprung clutch.
 

Davidwarren

Corporal
Nov 6, 2016
180
Louisville
Since you're going from a DMF (with springs) to a SMF (with no springs) you'll want a sprung clutch.
That's what I figured also. But I ordered the spec clutch with mFactory flywheel from a vendor, and got the solid hub disc. I thought it was a mistake, but the part numbers are for a solid hub. And the Spec clutches that are sprung hub are listed as not fitting an OEM style flywheel. I thought that might just be because they didn't want people putting a sprung hub on a DMFW, but the spec single mass is different than the mFactory and stock. The spec mounts flush to the face, and the stock/mFactory has a recessed face from the mounting and locating pins.

I have looked, and it seems all other people with a spec/mFactory combo have a solid hub too....
 

DR-JEKL

Private
Jan 16, 2017
34
Yeah I must admit I noticed that also...

I got a spec flywheel and stage 3+ and got a sprung clutch..
 

Slowvert135i

Corporal
Oct 24, 2017
111
Shelton, ct
You guys that are getting Spec clutches with the mFactory single mass, is it a sprung or solid clutch disc?
Hate to bring a dead horse to life but i went with mfactory smfw and spec st3+. They dont offer a sprung clutch hub that functions with the mfactory flywheel. Sadly i didn't know that until after my whole clutch runaround. Next time i will either be going with the mfactory twin disc (sprung) which was on back order until the day i received my setup or i will be doing a spec flywheel with sprung clutch
 
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Dmak

Specialist
Nov 19, 2017
60
I m in the same boat. I got mfactory smfw that fit factoty style clutch and a 335is clutch. Did some research. There are some ppl run smfw without a spung hub clutch disc with no problem mfactory also offer their smfw with a 335is clutch as a package.
With that said, i also seen some complain about having vibration at some rpm range. Not sure if related.
Upon my research. I found that ACT would sell a spung clutch disc alone that fit factory style clutch i believe.

http://www.advancedclutch.com/catalogsearch/result/?q=&mq=Bmw+135i

If you click into one of the spung option, at the bottom, it will show you all the pieces thats included in the kit. And you can just get the disc for like 180bux. This can be one way to go if you really worry about no spring within fw and clutch. I personally would try the combo first and see how it drive

http://www.advancedclutch.com/3000812
 
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veer90

Lieutenant
Nov 16, 2016
931
West Nyack, NY
I have a Spec 3+ solid clutch with mfactory smfw... no issues other than it being a very aggressive clutch setup. Stop and go traffic is entertaining.

As far as the confusion with solid vs sprung hub, there are 2 versions of the clutch disk / pressure plate for Spec 2+ and 3+:
  • solid hub clutch disk / self-adjusting pressure plate. meant to be used with the stock DMFW or a flywheel that accepts an oem style clutch / PP
  • sprung hub clutch disk / non self-adjusting pressure plate. meant to be used with Spec's own SMFW and will not work with the stock DMFW
Most vendors exclusively use pictures of option 2 regardless of what they're actually selling (Spec themselves seem to only have pics of option 2); they really should use accurate pictures but most of them don't care as long as they get your money.

I got into a huge argument with one of the higher ups from Mfactory on facebook when I accused them of false advertising. I ordered their clutch / flywheel package with option 2 pictured, and received option 1. The guy acted like I should have known Mfactory's flywheel was oem style despite being single mass, and uses a self-adjusting clutch, when none of that was mentioned in the promotion post / sale listing.
 
Last edited:
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Slowvert135i

Corporal
Oct 24, 2017
111
Shelton, ct
I have a Spec 3+ solid clutch with mfactory smfw... no issues other than it being a very aggressive clutch setup. Stop and go traffic is entertaining.

As far as the confusion with solid vs sprung hub, there are 2 versions of the clutch disk / pressure plate for Spec 2+ and 3+:
  • solid hub clutch disk / self-adjusting pressure plate. meant to be used with the stock DMFW or a flywheel that accepts an oem style clutch / PP
  • sprung hub clutch disk / non self-adjusting pressure plate. meant to be used with Spec's own SMFW and will not work with the stock DMFW
Most vendors exclusively use pictures of option 2 regardless of what they're actually selling (Spec themselves seem to only have pics of option 2); they really should use accurate pictures but most of them don't care as long as they get your money.

I got into a huge argument with one of the higher ups from Mfactory on facebook when I accused them of false advertising. I ordered their clutch / flywheel package with option 2 pictured, and received option 1. The guy acted like I should have known Mfactory's flywheel was oem style despite being single mass, and uses a self-adjusting clutch, when none of that was mentioned in the promotion post / sale listing.
I was also quite irritated with my purchase... I wanted sprung clutch and was then sent unsprung. after being told that it would be sprung.... Later to find out its not possible to run sprung disc on the mfactory wheel
 

Dmak

Specialist
Nov 19, 2017
60
I was also quite irritated with my purchase... I wanted sprung clutch and was then sent unsprung. after being told that it would be sprung.... Later to find out its not possible to run sprung disc on the mfactory wheel
Who told you cant run sprung disc on mfactory fw??
 

Dmak

Specialist
Nov 19, 2017
60
Spec did. Their sprung hub sticks out quite a bit from the clutch disk surface, and the indentation toward the middle on the mfactory smfw is not deep enough to clear it.
I see. The thing is, the spec sprung hub clutch is only made to fit the spec fw, not a factory one. So all together that clutch is not even made to use with a stock daimension fw.
I will have to compare the stock dmfw with the mfactory one when i have them out again. If the depth between tge two fw are the same. I still believe a clutch with sprung disc that is design for stock dmfw will fit. (Like the act one)
 

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