Carbon Fiber Driveshaft

squartus · 01-04-2016, 09:57 AM

Running carbon fiber DS on my e92 M3, the biggest difference is the 1 piece vs the OEM 2 piece. Removes almost all of the drivetrain lash/clunk

8600RPM · 01-04-2016, 03:54 PM

Any details? Brand, install and increase acceleration/throttle response?

squartus · 01-04-2016, 04:20 PM

Got it from DSS the day they put it out, would of been easy install if they would of sent me the right parts the first.. or second time. Does seem to launch a little better, more like a band feeling instead of a sudden jerk.

Main reason I got it was to see if would decrease whine from solid rear diff mounts, did nothing on that end. But biggest thing was the removal of drive train clunk, especially easing out in first gear. You can twist the OEM shaft with your hands and it will clunk a good bit.

Rajmun340 · 01-04-2016, 04:34 PM

Quote:

Originally Posted by !Xoible

so why do people have heavier knobs?

Because they can't shift f**** or because they bought a used car from someone could not shift f**** and ruined the synchros.

There is nothing more to it.

squartus · 01-04-2016, 07:55 PM

Quote:

Originally Posted by JoeM3SSII

Because they can't shift f**** or because they bought a used car from someone could not shift f**** and ruined the synchros.

There is nothing more to it.

Well true for most trannys, this car many times comes with a 2nd that fights you. Changing knobs and trans fluid to a different brand made mine decent. Only gripe iv ever had with this car, got to gently coax 2nd.

ashtaron14 · 01-04-2016, 09:15 PM

Quote:

Originally Posted by M3i6a

+1 Fall Line Motorsports carbon fiber driveshaft. Great product and excellent customer service from IND. Search ashtaron14 for full review on the Fall Line carbon fiber driveshaft.

hehe

Is that a DCT shaft? How's it working for you?

nholmes · 01-04-2016, 09:48 PM

No DCT offerings from DSS?

Hujan · 01-06-2016, 09:52 AM

Only bummer about the Fall Line shaft is the report of diff whine from the person who ran it with poly diff bushings before switching back to OEM rubber. Was that you, Ashtaron?

Not sure I'd want to give up more solid diff mounts for sake of the driveshaft.

6mtguy · 01-06-2016, 11:59 AM

Quote:

Originally Posted by ashtaron14

hehe

Is that a DCT shaft? How's it working for you?

It's a 6mt, very happy with the Fall Line driveshaft. Your review was spot on i end up keeping the TMS differential bushings and didn't go back to oem cause after driving around 350-400 miles the differential whine was pretty much back to normal like before just a tad louder.

ashtaron14 · 01-06-2016, 07:15 PM

Quote:

Originally Posted by M3i6a

It's a 6mt, very happy with the Fall Line driveshaft. Your review was spot on i end up keeping the TMS differential bushings and didn't go back to oem cause after driving around 350-400 miles the differential whine was pretty much back to normal like before just a tad louder.

Everyone's tolerance for drone or whine is a bit different. I did notice that it's quieter at speed now. Windows will rattle around 130km/hr, then goes away above that.

OM VT3 · 01-06-2016, 08:01 PM

Quote:

Originally Posted by ashtaron14

Everyone's tolerance for drone or whine is a bit different. I did notice that it's quieter at speed now. Windows will rattle around 130km/hr, then goes away above that.

You're saying the fall line shaft make the windows rattle?

ashtaron14 · 01-06-2016, 08:53 PM

Quote:

Originally Posted by Hujan

Only bummer about the Fall Line shaft is the report of diff whine from the person who ran it with poly diff bushings before switching back to OEM rubber. Was that you, Ashtaron?

Not sure I'd want to give up more solid diff mounts for sake of the driveshaft.

Yep, but tbh I don't notice the missing poly diff bushings at all, only thing missing is the humm/whine.

Quote:

Originally Posted by OM VT3

You're saying the fall line shaft make the windows rattle?

There will be NVH increase as speed rise for the Shaft, whereas for the diff bushing is RPM based.

OM VT3 · 01-06-2016, 09:00 PM

Quote:

Originally Posted by ashtaron14

Yep, but tbh I don't notice the missing poly diff bushings at all, only thing missing is the humm/whine.

There will be NVH increase as speed rise for the Shaft, whereas for the diff bushing is RPM based.

I have subframe and delrin diff bushings will the shaft add extra noise or does it vibrate the car?

ashtaron14 · 01-06-2016, 10:26 PM

Quote:

Originally Posted by OM VT3

Quote:

Originally Posted by ashtaron14

Yep, but tbh I don't notice the missing poly diff bushings at all, only thing missing is the humm/whine.

There will be NVH increase as speed rise for the Shaft, whereas for the diff bushing is RPM based.

I have subframe and delrin diff bushings will the shaft add extra noise or does it vibrate the car?

From my perspective , It should do both.

squartus · 01-07-2016, 12:33 AM

Hmm your saying thats something the CF shafts just do? I was about to turn mine because I thought it was slightly off balance as I start to get some vibrations/and hum over 100MPH. Running solid rear diff mounts and race engine mounts, only did this after CF drive shaft.

OM VT3 · 01-07-2016, 01:45 AM

Quote:

Originally Posted by squartus

Hmm your saying thats something the CF shafts just do? I was about to turn mine because I thought it was slightly off balance as I start to get some vibrations/and hum over 100MPH. Running solid rear diff mounts and race engine mounts, only did this after CF drive shaft.

That's strange I don't think it should vibrate

ashtaron14 · 01-07-2016, 07:17 PM

Quote:

Originally Posted by squartus

Hmm your saying thats something the CF shafts just do? I was about to turn mine because I thought it was slightly off balance as I start to get some vibrations/and hum over 100MPH. Running solid rear diff mounts and race engine mounts, only did this after CF drive shaft.

It should humm and the floor of your car should vibrate as speed climbs.

My installer had done JDM CF DS installations on Skylines R33/R34. According to him they all do the same thing, and with our cars it's already less violent.

You should be able to feel an unbalanced shaft sooner than over 100mph.

Hujan · 01-07-2016, 10:35 PM

I'm guessing the vibrations are because, instead of being taken up by the slop in the OEM shaft, the driveline vibrations are now being translated into the differential mounts and the subframe. If you have solid mounts, it would make it even more pronounced.

But that's just my lay suspicion.

8k4 · 01-09-2016, 11:49 AM

How are these things balanced? Where are the counterweights placed

squartus · 01-09-2016, 01:47 PM

I know on mine they are glued onto the outside of the shaft at proper points. Look like washers, can see it in this pic.

pbonsalb · 01-09-2016, 08:02 PM

It is a one piece. Stock is 2 piece. 1 piece more likely to add vibration. Particularly with stiffer bushings.

BMW uses 1 piece CF on new M3, but I think they retained the rubber guibo at the trans. DSS does not, don't know about Fall Line.

ashtaron14 · 01-10-2016, 07:14 PM

For the Fall-Line CF Shaft, the weights are attached by rivets, and there are some drilled holes in the adaptor plate (perhaps for balancing).

01-04-2016, 09:57 AM	#23
squartus Major 314 Rep 1,017 Posts Drives: 2010 E92 M3 6MT Join Date: Apr 2013 Location: Mississippi iTrader: (0) Garage List 2010 E92 BMW M3 [10.00]	Running carbon fiber DS on my e92 M3, the biggest difference is the 1 piece vs the OEM 2 piece. Removes almost all of the drivetrain lash/clunk __________________ 4.4L LC stroker/ESS VT2-625/Volk te37 sl's/AA exhaust/DSS Carbon Fiber driveshaft/ARH Headers.. etc
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01-04-2016, 03:54 PM	#24
8600RPM Lieutenant Colonel 657 Rep 1,749 Posts Drives: e92 m3 Join Date: Oct 2014 Location: AZ iTrader: (0)	Any details? Brand, install and increase acceleration/throttle response?
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01-04-2016, 04:20 PM	#25
squartus Major 314 Rep 1,017 Posts Drives: 2010 E92 M3 6MT Join Date: Apr 2013 Location: Mississippi iTrader: (0) Garage List 2010 E92 BMW M3 [10.00]	Got it from DSS the day they put it out, would of been easy install if they would of sent me the right parts the first.. or second time. Does seem to launch a little better, more like a band feeling instead of a sudden jerk. Main reason I got it was to see if would decrease whine from solid rear diff mounts, did nothing on that end. But biggest thing was the removal of drive train clunk, especially easing out in first gear. You can twist the OEM shaft with your hands and it will clunk a good bit. __________________ 4.4L LC stroker/ESS VT2-625/Volk te37 sl's/AA exhaust/DSS Carbon Fiber driveshaft/ARH Headers.. etc
	Appreciate 1 BanjoPaterson160.50 Quote

01-06-2016, 09:52 AM	#30
Hujan Brigadier General 569 Rep 3,742 Posts Drives: M3 Join Date: Apr 2013 Location: . iTrader: (16)	Only bummer about the Fall Line shaft is the report of diff whine from the person who ran it with poly diff bushings before switching back to OEM rubber. Was that you, Ashtaron? Not sure I'd want to give up more solid diff mounts for sake of the driveshaft.
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01-07-2016, 12:33 AM	#37
squartus Major 314 Rep 1,017 Posts Drives: 2010 E92 M3 6MT Join Date: Apr 2013 Location: Mississippi iTrader: (0) Garage List 2010 E92 BMW M3 [10.00]	Hmm your saying thats something the CF shafts just do? I was about to turn mine because I thought it was slightly off balance as I start to get some vibrations/and hum over 100MPH. Running solid rear diff mounts and race engine mounts, only did this after CF drive shaft. __________________ 4.4L LC stroker/ESS VT2-625/Volk te37 sl's/AA exhaust/DSS Carbon Fiber driveshaft/ARH Headers.. etc
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01-07-2016, 10:35 PM	#40
Hujan Brigadier General 569 Rep 3,742 Posts Drives: M3 Join Date: Apr 2013 Location: . iTrader: (16)	I'm guessing the vibrations are because, instead of being taken up by the slop in the OEM shaft, the driveline vibrations are now being translated into the differential mounts and the subframe. If you have solid mounts, it would make it even more pronounced. But that's just my lay suspicion.
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01-09-2016, 11:49 AM	#41
8k4 First Lieutenant 163 Rep 369 Posts Drives: E92 Join Date: Nov 2015 Location: Earth iTrader: (0)	How are these things balanced? Where are the counterweights placed
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01-09-2016, 01:47 PM	#42
squartus Major 314 Rep 1,017 Posts Drives: 2010 E92 M3 6MT Join Date: Apr 2013 Location: Mississippi iTrader: (0) Garage List 2010 E92 BMW M3 [10.00]	I know on mine they are glued onto the outside of the shaft at proper points. Look like washers, can see it in this pic. __________________ 4.4L LC stroker/ESS VT2-625/Volk te37 sl's/AA exhaust/DSS Carbon Fiber driveshaft/ARH Headers.. etc
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01-09-2016, 08:02 PM	#43
pbonsalb Lieutenant General 5216 Rep 10,603 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	It is a one piece. Stock is 2 piece. 1 piece more likely to add vibration. Particularly with stiffer bushings. BMW uses 1 piece CF on new M3, but I think they retained the rubber guibo at the trans. DSS does not, don't know about Fall Line.
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01-10-2016, 07:14 PM	#44
ashtaron14 Major 1123 Rep 1,083 Posts Drives: G80 M3 Join Date: Jun 2011 Location: HK iTrader: (0)	For the Fall-Line CF Shaft, the weights are attached by rivets, and there are some drilled holes in the adaptor plate (perhaps for balancing). Attached Images __________________ My G80 M3 Follow me on IG
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