Installed twin disc x-clutch and flywheel, now excessive noise.

fredcase · 08-12-2019, 12:28 PM

I installed a x-clutch twin disc, mfactory smfw, ecs transmission mounts, new guibo, and brass pivot pin. I get a crazy grinding chattering noise, and vibrations. The noise is only heard in gear under load and in neutral with revs. No noise with clutch depressed.

fredcase · 08-12-2019, 12:32 PM

These videos don't do it justice, its very load and apparent from inside while driving.

streetpro · 08-13-2019, 02:16 AM

I had a Tilton twin clutch plus a single mass flywheel on a S50 engine and it was far from being quiet... at idle even the transmission (MT) was chattering... and the launches were harsh, engine ignitions were beating through the trans to the chassis... but that was due to the single mass FW and no springs in the clutch itself..

dpaul · 08-13-2019, 10:07 AM

Honestly, what did you expect? Why do you think BMW (and everybody else) installs those expensive and fragile dual mass flywheels?

You are probably aware of this but FWIW, you expect the noise to cease when you disengage the clutch. The noise is from gears in the transmission rattling back and forth reflecting the periodic changes in crankshaft rotational speed (i.e. momentarily faster when each cylinder fires). The noise does not come from the flywheel or clutch itself. The whole point of the DMFW is to damp out those periodic variations.

fredcase · 08-13-2019, 11:43 AM

Quote:

Originally Posted by dpaul

Honestly, what did you expect? Why do you think BMW (and everybody else) installs those expensive and fragile dual mass flywheels?

You are probably aware of this but FWIW, you expect the noise to cease when you disengage the clutch. The noise is from gears in the transmission rattling back and forth reflecting the periodic changes in crankshaft rotational speed (i.e. momentarily faster when each cylinder fires). The noise does not come from the flywheel or clutch itself. The whole point of the DMFW is to damp out those periodic variations.

Didn't expect it to be this bad.

dpaul · 08-13-2019, 11:45 AM

Yeah it sucks - but performance comes at a price. Even with a dual mass flywheel it is clearly audible in my M3 (although my 335 is silent with the OEM DMFW).

type-dRew · 08-13-2019, 11:52 AM

Yeah, thats to be expected.

Steel or aluminum flywheel?

fredcase · 08-13-2019, 12:37 PM

Quote:

Originally Posted by type-dRew

Yeah, thats to be expected.

Steel or aluminum flywheel?

steel

type-dRew · 08-13-2019, 01:03 PM

Quote:

Originally Posted by fredcase

steel

Seems right then, was going to say thats pretty quiet for alum

nissubaru · 08-13-2019, 01:49 PM

That does sound pretty shitty in my opinion. I have a Spec stage 2 clutch plus steel flywheel and it sounds like a tractor at low speeds but the more you rev it the less noticeable the sound is. No other knowledge on clutches to add, just stating how mine sounds.

type-dRew · 08-14-2019, 07:05 AM

Quote:

Originally Posted by nissubaru

That does sound pretty shitty in my opinion. I have a Spec stage 2 clutch plus steel flywheel and it sounds like a tractor at low speeds but the more you rev it the less noticeable the sound is. No other knowledge on clutches to add, just stating how mine sounds.

Yeah, id always expect more noise when adding more moving parts and clamping strength

Ive never heard a quiet twin disc

08-12-2019, 12:28 PM	#1
fredcase Captain 261 Rep 776 Posts Drives: Bmw=trash Join Date: Mar 2014 Location: Noyb iTrader: (1)	Installed twin disc x-clutch and flywheel, now excessive noise. I installed a x-clutch twin disc, mfactory smfw, ecs transmission mounts, new guibo, and brass pivot pin. I get a crazy grinding chattering noise, and vibrations. The noise is only heard in gear under load and in neutral with revs. No noise with clutch depressed.
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08-12-2019, 12:32 PM	#2
fredcase Captain 261 Rep 776 Posts Drives: Bmw=trash Join Date: Mar 2014 Location: Noyb iTrader: (1)	These videos don't do it justice, its very load and apparent from inside while driving.
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08-13-2019, 02:16 AM	#3
streetpro Second Lieutenant 87 Rep 236 Posts Drives: e92 335iA Join Date: Nov 2018 Location: Prague iTrader: (0) Garage List 2006 Bmw e92 335iA [0.00]	I had a Tilton twin clutch plus a single mass flywheel on a S50 engine and it was far from being quiet... at idle even the transmission (MT) was chattering... and the launches were harsh, engine ignitions were beating through the trans to the chassis... but that was due to the single mass FW and no springs in the clutch itself.. __________________ "If everything seems under control, you're not going fast enough.” Mario Andretti
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08-13-2019, 10:07 AM	#4
dpaul Lieutenant Colonel 654 Rep 1,893 Posts Drives: 2009 E90 335xi, 2011 E93 M3 Join Date: Dec 2012 Location: Boston iTrader: (3)	Honestly, what did you expect? Why do you think BMW (and everybody else) installs those expensive and fragile dual mass flywheels? You are probably aware of this but FWIW, you expect the noise to cease when you disengage the clutch. The noise is from gears in the transmission rattling back and forth reflecting the periodic changes in crankshaft rotational speed (i.e. momentarily faster when each cylinder fires). The noise does not come from the flywheel or clutch itself. The whole point of the DMFW is to damp out those periodic variations.
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08-13-2019, 11:45 AM	#6
dpaul Lieutenant Colonel 654 Rep 1,893 Posts Drives: 2009 E90 335xi, 2011 E93 M3 Join Date: Dec 2012 Location: Boston iTrader: (3)	Yeah it sucks - but performance comes at a price. Even with a dual mass flywheel it is clearly audible in my M3 (although my 335 is silent with the OEM DMFW).
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08-13-2019, 11:52 AM	#7
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	Yeah, thats to be expected. Steel or aluminum flywheel? __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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08-13-2019, 01:49 PM	#10
nissubaru Lieutenant 233 Rep 564 Posts Drives: 09 335i MSport + 1990 300ZX TT Join Date: Jan 2017 Location: Philadelphia iTrader: (0)	That does sound pretty shitty in my opinion. I have a Spec stage 2 clutch plus steel flywheel and it sounds like a tractor at low speeds but the more you rev it the less noticeable the sound is. No other knowledge on clutches to add, just stating how mine sounds.
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