335is clutch

DahStig88 · 04-19-2015, 07:31 PM

If replacing my clutch with the 335is clutch do I have to also replace the flywheel? If so can I use the Mfactory smfl or do I need to go with a stock flywheel?

Freon · 04-19-2015, 09:20 PM

Flywheels are wear parts just like clutches and pressure places. They should be replaced or resurfaced with every clutch change.

Dual mass flywheels at a minimum make resurfacing problematic, and possibly not practical if you cannot find someone who is qualified and confident in actually performing the resurface service on a DMF. There have already been good discussion on that subject so your best bet would be to search for "resurface" and/or "flywheel" and read the previous discussions.

This could be an opportunity to switch to an aftermarket single mass flywheel with reduced weight, but increased NVH.

PA135i · 04-19-2015, 09:23 PM

Just had my clutch replaced at the dealer. The rear main seal leaked.. and ruined the clutch. 38K on the clutch. They replaced the dual mass flywheel along with all necessary parts.

cbl117 · 04-20-2015, 12:28 AM

Is the 335is a upgrade from the stock clutch?

DahStig88 · 04-20-2015, 12:35 AM

Yeah, they hold a lot more torque. If i'm not mistaken they come stock on the 335is/550i/650i and 550i's come with 480tq stock and have been handling bolt ons.

amsnow440 · 04-21-2015, 10:21 AM

The first question I would ask is how many miles do you have on your current FW? Although, it's very hard to tell without actually seeing the flywheel surface. There are a few machinists who can resurface DMFWs but they are hard to find and then you have to consider the age (fatigue) of the springs inside the DMFW.

I'm actually in the same boat and I'm looking to replace my stock clutch with the 335is/550i unit, however my stock cutch isn't worn, just weak. It started slipping on Sunday under full power in 3rd and 4th. This was two weeks after the new E85 backend flash from Terry, E55 mix, and a 19.5 psi target. It simply can't can't hold the torque that I'm making. I'm trying to determine if, at only 20k miles, a new flywheel is really necessary. I'm going to search for local machinists and see if they are willing to resurface mine if that's even necessary.

Worst case you can pick up a new one from Ebay for $600-$700.

MFactory · 04-21-2015, 10:56 AM

You can pick up a new (reman) 550i Clutch & SMFW for only slightly more than that.

Would probably cost similar (or more) to buy a new clutch & have your DMFW resurfaced

135TX · 04-21-2015, 11:17 AM

Just to be clear, Can you couple a stock or 335is clutch with a single mass flywheel?

amsnow440 · 04-21-2015, 11:22 AM

Quote:

Originally Posted by MFactory

You can pick up a new (reman) 550i Clutch & SMFW for only slightly more than that.

Would probably cost similar (or more) to buy a new clutch & have your DMFW resurfaced

Agreed, it is the cheaper solution. I'm still not sure if I'm willing to tolerate gear chatter on this car though with a SMFW and not sure if the OP is either.

My buddy is installing this exact setup (Mfactory SMFW and 550i clutch) soon, so I'll be able to see it first hand. Any insight as to how well an unsprung clutch works with a smfw?

MFactory · 04-21-2015, 11:28 AM

Quote:

Originally Posted by 135TX

Just to be clear, Can you couple a stock or 335is clutch with a single mass flywheel?

Yes, not an issue

Quote:

Originally Posted by amsnow440

Agreed, it is the cheaper solution. I'm still not sure if I'm willing to tolerate gear chatter on this car though with a SMFW and not sure if the OP is either.

My buddy is installing this exact setup (Mfactory SMFW and 550i clutch) soon, so I'll be able to see it first hand. Any insight as to how well an unsprung clutch works with a smfw?

Changing to a SMFW doesn't really have too much affect on the 335i in terms of smoothness of engagement (which is where sprung/unsprung come in). Unsprung (like the oem) is still very smooth when shifting gears

edisapimp · 04-21-2015, 01:50 PM

Quote:

Originally Posted by amsnow440

Agreed, it is the cheaper solution. I'm still not sure if I'm willing to tolerate gear chatter on this car though with a SMFW and not sure if the OP is either.

My buddy is installing this exact setup (Mfactory SMFW and 550i clutch) soon, so I'll be able to see it first hand. Any insight as to how well an unsprung clutch works with a smfw?

Sounds ghey.

DahStig88 · 04-21-2015, 03:52 PM

Yeah based on everyone else's experience and the reviews on both the 335is clutch and Mfactory SMFW, that's the path i'm going to take. Like amsnow440 said mine also only slips when i get on it tuned. Stock and Cobb OTS maps hold fine. Use to just be on my E-50 Pro-tune but after having my 93 map revised by Dzenno it slips on 93 now too. Moarr Powaaa!!! Thanks for the help guys.

SixBanger · 04-24-2015, 11:23 PM

Quote:

Originally Posted by DahStig88

Yeah based on everyone else's experience and the reviews on both the 335is clutch and Mfactory SMFW, that's the path i'm going to take. Like amsnow440 said mine also only slips when i get on it tuned. Stock and Cobb OTS maps hold fine. Use to just be on my E-50 Pro-tune but after having my 93 map revised by Dzenno it slips on 93 now too. Moarr Powaaa!!! Thanks for the help guys.

I've been told that the SMFW is noisy and that the car needs the DMFW, thats how it was built? I bought my f10 550i clutch from getbmwparts. I need a flywheel now, I'm hearing people buy the cheap "LUK" ebay DMFW and/or single mass. I'm between a rock and hard place, and I need to order a flywheel ASAP because my clutch has really no life left.
Myles

edisapimp · 04-25-2015, 06:39 AM

These cars + "cheap" do not go together.

SamE30 · 04-27-2015, 08:01 PM

They do not need to be replaced in unison. I've replaced several clutch discs and pressure plates with the original flywheel in place. Obviously if it's been slipping and has caused heat scoring on the surface, it should be replaced. But you won't know till it's apart. They aren't cheap to replace, so if you don't need to, I wouldn't.

lowbudgethero · 04-27-2015, 09:46 PM

LUK is the OE manufacture of flywheels for BMW

Falco1992 · 04-28-2015, 10:13 AM

Does anyone know how much the 335is/550i clutch kit will safely hold?

I'm currently having the same problem, only mine is dynod at 452whp and 600nm on 98 octane and planning on changing the stock exhaust and remap with 102 octane.

lowbudgethero · 04-28-2015, 03:53 PM

I would guess as much power as a flash tuned 550i

DahStig88 · 04-29-2015, 06:51 PM

Could someone explain to me why i hear people advise against doing 5th and especially 6th gear pulls?

zbrit00x · 04-30-2015, 09:56 AM

Most likely you will be traveling pretty slow.. Rpms will be low, engine speeds low, going wot in a higher gear at a low rpm heavily loads the motor and can cause engine damage/ bend rods because of the additional stresses.

jbertino · 05-02-2015, 10:23 PM

I have the 550i clutch and smfw .
There is a lot of chatter
Pedal feel is as soft as stock . Haven't cranked up the boost yet. But holds my fbo protune e30 map fine

BB-Driver · 05-19-2015, 10:53 AM

Anyone who drive the 335is clutch + mfactory smfw in The n55 Gearbox?

04-19-2015, 07:31 PM	#1
DahStig88 New Member 2 Rep 28 Posts Drives: 2011 135i M Sport MT Join Date: Nov 2013 Location: NJ, USA iTrader: (0)	335is clutch If replacing my clutch with the 335is clutch do I have to also replace the flywheel? If so can I use the Mfactory smfl or do I need to go with a stock flywheel? __________________ E82 135i - Cobb Ap V2 PTF Custom Maps \| Berk MId & Cat-back Exhaust \| VSRF DP & CP \| BMS CDV \| BMS Clutch Stop \| Apex 8 Wheels \| BMS Performance Intake \| ER FMIC \| BMS Cowls Filters \| BMS Sport Oil Cooler Valve.
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04-19-2015, 09:20 PM	#2
Freon Major 81 Rep 1,051 Posts Drives: 2009 135i Join Date: Nov 2007 Location: Indianapolis iTrader: (3)	Flywheels are wear parts just like clutches and pressure places. They should be replaced or resurfaced with every clutch change. Dual mass flywheels at a minimum make resurfacing problematic, and possibly not practical if you cannot find someone who is qualified and confident in actually performing the resurface service on a DMF. There have already been good discussion on that subject so your best bet would be to search for "resurface" and/or "flywheel" and read the previous discussions. This could be an opportunity to switch to an aftermarket single mass flywheel with reduced weight, but increased NVH. __________________ 2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
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04-19-2015, 09:23 PM	#3
PA135i Brigadier General 967 Rep 3,323 Posts Drives: 08 135i 08 CR-V Join Date: Dec 2007 Location: Pennsylvania iTrader: (0)	Just had my clutch replaced at the dealer. The rear main seal leaked.. and ruined the clutch. 38K on the clutch. They replaced the dual mass flywheel along with all necessary parts. __________________ Sparkling Graphite Metallic / 6MT / Terracotta Boston Leather / Sport Package / Comfort Access system / Gray Poplar wood trim / Heated front seats / iPod and USB adapter / HD radio / Premium hi-fi system / OE Tuning / VRSF Intercooler & charge pipe / BMW Performance short shift kit / BMW M Performance Handbrake Handle / BMW Stainless steel pedals / V1 hardwired / rear sun shades *Pennsylvania 20 electoral votes*
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04-20-2015, 12:28 AM	#4
cbl117 Lieutenant 99 Rep 566 Posts Drives: 2013 e92 335i Join Date: May 2013 Location: Los Angeles iTrader: (1)	Is the 335is a upgrade from the stock clutch? __________________ CURRENT: 2013 TSM 335i 6AT \| Stock!!...for now \| SOLD: 2010 CR 135i 6MT \| 351 WHP 387 WTQ \| Dinan Stage 2 \| Dinan Intercooler \| BMS DCI \| Berk Street Axle Back \| N55 Midpipe \| BMWP Y-Pipe \| Bilstein HD Dampers \| BMWP Springs \| Whiteline RSFB Inserts \| 225/255 RE71R \| CDV Delete \| CF Diffuser \|
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04-20-2015, 12:35 AM	#5
DahStig88 New Member 2 Rep 28 Posts Drives: 2011 135i M Sport MT Join Date: Nov 2013 Location: NJ, USA iTrader: (0)	Yeah, they hold a lot more torque. If i'm not mistaken they come stock on the 335is/550i/650i and 550i's come with 480tq stock and have been handling bolt ons. __________________ E82 135i - Cobb Ap V2 PTF Custom Maps \| Berk MId & Cat-back Exhaust \| VSRF DP & CP \| BMS CDV \| BMS Clutch Stop \| Apex 8 Wheels \| BMS Performance Intake \| ER FMIC \| BMS Cowls Filters \| BMS Sport Oil Cooler Valve.
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04-21-2015, 10:21 AM	#6
amsnow440 Olmec's Temple Guard 80 Rep 217 Posts Drives: 2010 135i 6MT, 05 Legacy GT Join Date: Oct 2013 Location: Lebanon, NJ iTrader: (0)	The first question I would ask is how many miles do you have on your current FW? Although, it's very hard to tell without actually seeing the flywheel surface. There are a few machinists who can resurface DMFWs but they are hard to find and then you have to consider the age (fatigue) of the springs inside the DMFW. I'm actually in the same boat and I'm looking to replace my stock clutch with the 335is/550i unit, however my stock cutch isn't worn, just weak. It started slipping on Sunday under full power in 3rd and 4th. This was two weeks after the new E85 backend flash from Terry, E55 mix, and a 19.5 psi target. It simply can't can't hold the torque that I'm making. I'm trying to determine if, at only 20k miles, a new flywheel is really necessary. I'm going to search for local machinists and see if they are willing to resurface mine if that's even necessary. Worst case you can pick up a new one from Ebay for $600-$700. __________________ 2010 135i 6MT Jet Black M-Sport
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04-21-2015, 10:56 AM	#7
MFactory Major 581 Rep 1,421 Posts Drives: E92 M3 Join Date: Feb 2014 Location: San Dimas, CA iTrader: (2)	You can pick up a new (reman) 550i Clutch & SMFW for only slightly more than that. Would probably cost similar (or more) to buy a new clutch & have your DMFW resurfaced
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04-21-2015, 03:52 PM	#12
DahStig88 New Member 2 Rep 28 Posts Drives: 2011 135i M Sport MT Join Date: Nov 2013 Location: NJ, USA iTrader: (0)	Yeah based on everyone else's experience and the reviews on both the 335is clutch and Mfactory SMFW, that's the path i'm going to take. Like amsnow440 said mine also only slips when i get on it tuned. Stock and Cobb OTS maps hold fine. Use to just be on my E-50 Pro-tune but after having my 93 map revised by Dzenno it slips on 93 now too. Moarr Powaaa!!! Thanks for the help guys. __________________ E82 135i - Cobb Ap V2 PTF Custom Maps \| Berk MId & Cat-back Exhaust \| VSRF DP & CP \| BMS CDV \| BMS Clutch Stop \| Apex 8 Wheels \| BMS Performance Intake \| ER FMIC \| BMS Cowls Filters \| BMS Sport Oil Cooler Valve.
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04-25-2015, 06:39 AM	#14
edisapimp Civil Rights Activist 115 Rep 949 Posts Drives: E46 Sedan, E88 Vert Join Date: Apr 2013 Location: Long Island iTrader: (0)	These cars + "cheap" do not go together. __________________ E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets
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04-27-2015, 08:01 PM	#15
SamE30 BMW Certified Technician 0 Rep 19 Posts Drives: 84 325e 2.8L PTE6262 Join Date: Nov 2012 Location: Canada iTrader: (0)	They do not need to be replaced in unison. I've replaced several clutch discs and pressure plates with the original flywheel in place. Obviously if it's been slipping and has caused heat scoring on the surface, it should be replaced. But you won't know till it's apart. They aren't cheap to replace, so if you don't need to, I wouldn't.
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04-27-2015, 09:46 PM	#16
lowbudgethero Captain 125 Rep 750 Posts Drives: '98 Z3M (gone), '09 135i Join Date: Feb 2013 Location: 908 iTrader: (0) Garage List 2009 BMW 135i [8.50]	LUK is the OE manufacture of flywheels for BMW
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04-28-2015, 10:13 AM	#17
Falco1992 New Member 0 Rep 6 Posts Drives: 2008 rb-turbo 135i manual Join Date: Apr 2015 Location: Netherlands iTrader: (0)	Does anyone know how much the 335is/550i clutch kit will safely hold? I'm currently having the same problem, only mine is dynod at 452whp and 600nm on 98 octane and planning on changing the stock exhaust and remap with 102 octane. __________________ BMW 135i 6MT 2008 RB-turbo 452whp - 600nm
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04-28-2015, 03:53 PM	#18
lowbudgethero Captain 125 Rep 750 Posts Drives: '98 Z3M (gone), '09 135i Join Date: Feb 2013 Location: 908 iTrader: (0) Garage List 2009 BMW 135i [8.50]	I would guess as much power as a flash tuned 550i
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04-29-2015, 06:51 PM	#19
DahStig88 New Member 2 Rep 28 Posts Drives: 2011 135i M Sport MT Join Date: Nov 2013 Location: NJ, USA iTrader: (0)	Could someone explain to me why i hear people advise against doing 5th and especially 6th gear pulls? __________________ E82 135i - Cobb Ap V2 PTF Custom Maps \| Berk MId & Cat-back Exhaust \| VSRF DP & CP \| BMS CDV \| BMS Clutch Stop \| Apex 8 Wheels \| BMS Performance Intake \| ER FMIC \| BMS Cowls Filters \| BMS Sport Oil Cooler Valve.
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04-30-2015, 09:56 AM	#20
zbrit00x Private First Class 23 Rep 141 Posts Drives: F80 M3 Join Date: Mar 2014 Location: socal iTrader: (1)	Most likely you will be traveling pretty slow.. Rpms will be low, engine speeds low, going wot in a higher gear at a low rpm heavily loads the motor and can cause engine damage/ bend rods because of the additional stresses.
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05-02-2015, 10:23 PM	#21
jbertino Lieutenant 34 Rep 513 Posts Drives: 2010 135i 6mt fbo protune e30 Join Date: Apr 2012 Location: nj iTrader: (1)	I have the 550i clutch and smfw . There is a lot of chatter Pedal feel is as soft as stock . Haven't cranked up the boost yet. But holds my fbo protune e30 map fine __________________ full bolt on 6mt cobb e30 protune fortune auto coilovers 12.08 119
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05-19-2015, 10:53 AM	#22
BB-Driver Banned 15 Rep 32 Posts Drives: BMW E82 1M Join Date: Jun 2010 Location: Germany iTrader: (0)	Anyone who drive the 335is clutch + mfactory smfw in The n55 Gearbox?
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