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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jan-10-2019, 12:39:39 AM   #1
WALKD_U
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Default J-Fiber E46 M3 SMG/NON-SMG CF Driveshaft Review

J-Fiber sent me some photo of the process (balancing)



Here are the photos put together showing all the concerns of the CV joint have the relief slot for removal of the driveshaft. My shaft is about 11.5lbs +/- compare to OEM e46 M3 is 18lbs+/-



Here is the Driveshaft unboxed and on my mechanics tool box ready for install.



Here is a photo courtesy of m3tuning is a VAC label J-Fiber non-SMG driveshaft as you can see where it mounts to the flex disc. It has same diameter throughout rather than a taper like the one I am reviewing. With Stan (stash1) and YCW as they worked out the revisions with J-Fiber for the DS. Now they are compatible with SMG due to the taper.



My mechanic (Billiam Mason) did the install and inspection of the shaft. We are very impress with this driveshaft and it is super light



Here is a photo at the transmission side and does clear the actuator with no issues. We see no issues for anyone with SMG or 6 Speed manual.



Dyno sheet before J-Fiber DS



Dyno sheet after J-Fiber DS

TBA

Took a quick test drive at 80mph and no vibrations or issues with it yet. This is with 28psi of boost and on e95 Gave it a few WOT and hasn't blown up yet J-Fiber assured me that this driveshaft is able to handle up to 2000hp. I will update this review as I drive her more and dyno sheet as well.
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Last edited by WALKD_U; Thu, Jan-10-2019 at 08:04:18 PM.
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Old Thu, Jan-10-2019, 01:43:27 AM   #2
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

That's a wee bit of boost...

Can we put this on someone else's car that makes a normal/human amount of horsepower for their review instead? Cause how the hell will you know if it makes the engine's job any easier?
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Old Thu, Jan-10-2019, 02:01:46 AM   #3
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

Looks awesome. Letís do this!


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Old Thu, Jan-10-2019, 11:04:25 AM   #4
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

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Originally Posted by Dave B View Post
That's a wee bit of boost...

Can we put this on someone else's car that makes a normal/human amount of horsepower for their review instead? Cause how the hell will you know if it makes the engine's job any easier?
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Old Thu, Jan-10-2019, 11:46:44 AM   #5
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by Dave B View Post
That's a wee bit of boost...

Can we put this on someone else's car that makes a normal/human amount of horsepower for their review instead? Cause how the hell will you know if it makes the engine's job any easier?
There is 2 other members already have this on their N/A motors. That is Stan (stash1) and Allen (WuBai) both have identical driveshaft that I am currently reviewing. If you think that is not enough you can order the driveshaft at the retail price of $1800 shipped and will be refunded the difference of the GB price once finished. Give us a review like I am doing.

I'm only doing this because I want to gain the most HP and TQ out of my setup. Sure, I am running a-lot more HP/TQ then most of the people here in this group but that doesn't mean the results be much different...
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Old Thu, Jan-10-2019, 12:21:50 PM   #6
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

Thanks for posting the review
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Old Thu, Jan-10-2019, 12:58:22 PM   #7
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

Any chance you weighted it?
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Old Thu, Jan-10-2019, 01:30:41 PM   #8
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

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Originally Posted by Obioban View Post
Any chance you weighted it?
It is 11.483 lbs but I rounded up to 11.5+/- lbs.

Update: I asked J-Fiber and they said that average weight for the CF Shafts is about 4.7-5.3kg. Reason of this small variance is due to the counterweight to make the shaft balanced.
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Last edited by WALKD_U; Thu, Jan-10-2019 at 01:59:49 PM.
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Old Thu, Jan-10-2019, 07:02:48 PM   #9
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

Whatís the benefit of a CF shaft. Less rotational mass? Does it makes a huge difference?
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Old Thu, Jan-10-2019, 08:02:02 PM   #10
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Default Re: J-Fiber E46 M3 CF Driveshaft Review

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Originally Posted by bimmerrodg View Post
Whatís the benefit of a CF shaft. Less rotational mass? Does it makes a huge difference?
Stock driveshafts are made from heavy steel and are designed for maximum noise, vibration, and harshness dampening. Your stock driveshaft is also designed to last the life of your daily driven car and is not designed with performance in mind. The heavier any rotating part on your car, the more engine power is used to move these items. As you lower the weight, you free up more horsepower to the wheels. This will also allow the engine to rev up much quicker to help get you into your power band sooner. This is not to be confused with gaining horsepower from simply adding a lighter driveshaft. You will make the same amount of power, but you are lowering the amount of power being lost from spinning the drivetrain; thus, allowing more power to reach the rear wheels.
  • Carbon fiber driveshafts are stronger than aluminum and produce less noise
  • Carbon fiber is also safer to run because when aluminum fails it shatters whereas carbon fiber shears
Carbon fiber is a miracle material. Itís even lighter than aluminum and has more torsional strength than steel. A carbon fiber driveshaft will typically weigh about 1-2 pounds less than an aluminum driveshaft. The slight weight difference gives it a slight advantage over aluminum, but the biggest benefit to a carbon fiber driveshaft is its ability to absorb vibrations and other rotational harmonics commonly transmitted by steel and aluminum driveshafts. Since carbon fiber is many layers, the plies of the driveshaft will absorb and dissipate the vibrations. Carbon fiber is also safer if it were to fail. When an aluminum driveshaft breaks it can throw shrapnel all over the place and cause serious damage the underside of your BMW. When a carbon fiber driveshaft fails, it will shred back into fibers.

Carbon fiber driveshafts are rated to withstand up to 2000HP. Carbon fiber driveshaftís also come with upgraded U-joints and CV joints to deliver strong connections between the engine and the rear axle. By switching to a carbon fiber driveshaft, you will have the least amount of vibration over any other available option. Most people find a carbon fiber driveshaft is the best choice in keeping cabin noise down as well.

Carbon fiber offers many benefits over aluminum, but that comes with a cost. On average, carbon fiber driveshafts cost about 30-50% more than their aluminum counterparts. If you are looking for a driveshaft to lower ETs, make the car rev more quickly, and donít mind a little extra noise, the aluminum driveshaft is the way to go. If you are looking for improved performance, a refined driveline, and do not mind spending the extra money for that refinement, a carbon fiber driveshaft is right for you.
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Discussing J-Fiber E46 M3 CF Driveshaft Review in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)