BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

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.


Reply
 
Thread Tools Display Modes
Old Sun, Jan-13-2019, 08:29:54 PM   #31
terraphantm
Moderator
 
Join Date: Dec 2010
Posts: 12,230
In the garage:
Reputation: 11 terraphantm is on a distinguished road
Location: Philadelphia

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by Obioban View Post
Edit: unless it's because a faster engine spins up faster, and therefore needs more hp to spin it up at that faster rate
That's true, but I still don't think it would be a percentage. You'll need more energy to spin up the flywheel from 7k RPM to 8k RPM than you would from 3k to 4k, but the power the engine makes shouldn't impact the amount of energy the flywheel needs to spin up.
Jump to top terraphantm is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Sun, Jan-13-2019, 08:33:01 PM   #32
terraphantm
Moderator
 
Join Date: Dec 2010
Posts: 12,230
In the garage:
Reputation: 11 terraphantm is on a distinguished road
Location: Philadelphia

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by pbonsalb View Post
I think stock shafts are lightweight aluminum. The CF cuts the weight from maybe 22 lbs to maybe 12 lbs. Any rotational loss helps but the diameter here is small so not as much energy is used to rotate it as with a wheel where the weight is around a bigger diameter. The CF shaft is not a top priority mod. Itís more for the person who is chasing power and has done everything else.
Stock is 8.5 kg (18.73 lbs) according to realOEM. That includes the giubo, CSB, and CV joint

https://www.realoem.com/bmw/enUS/par...&q=26112229240
Jump to top terraphantm is offline   Reply With Quote
Old Mon, Jan-14-2019, 03:15:05 AM   #33
HassanEido
Registered User
 
HassanEido's Avatar
 
Join Date: Oct 2014
Posts: 4,125
In the garage:
Reputation: 0 HassanEido is on a distinguished road

Lebanon




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by Paulo M View Post
It’s carbon composite, not steel covered by cf lol. It was designed for strength sure, but still light
This suggests it's steel core and it's heavy. Granted forums are not the best source for info, but who gives a fuk about 350zs anyway lol

https://www.350z-tech.com/forums/190...riveshaft.html
__________________

Mods:
-Custom CF airbox
-SSV2 catless headers(with a modified collector extention), Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
385.7 whp 288 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10

Last edited by HassanEido; Mon, Jan-14-2019 at 03:24:36 AM.
Jump to top HassanEido is online now   Reply With Quote
Old Mon, Jan-14-2019, 12:50:45 PM   #34
Paulo M
Registered User
 
Join Date: Jan 2015
Posts: 2,453
Reputation: 0 Paulo M is on a distinguished road

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by HassanEido View Post
This suggests it's steel core and it's heavy. Granted forums are not the best source for info, but who gives a fuk about 350zs anyway lol

https://www.350z-tech.com/forums/190...riveshaft.html

Everything Iíve seen said nothing of steel wrapped in cf, thereís no benefit to doing that. But I agree, donít really care at this point.



Sent from my iPhone using Tapatalk
__________________
BREMBO APEX DIXIS
Jump to top Paulo M is online now   Reply With Quote
Old Mon, Jan-14-2019, 03:00:58 PM   #35
m3 hal
Registered User
 
Join Date: Jan 2006
Posts: 21,741
Reputation: 0 m3 hal will become famous soon enough

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by stash1 View Post
As I stated in my previous d/s thread, I'm not sure what the science works out to in terms of d/s dia vs. rotational mass vs the gravity on the moon...but there is MOST def a noticeable increase in engine response/rpm's vs a factory d/s. It's def not placebo! I'm sure that forum member Wubai can also attest to the effect.
It may feel more responsive since the center bearing joint was deleted, but if you're suggesting a gain in power, then it came from something other than the weight loss.
Jump to top m3 hal is offline   Reply With Quote
Old Mon, Jan-14-2019, 06:48:45 PM   #36
Dr M3an M3
GroupBuyingPower@outlook. com
 
Dr M3an M3's Avatar
 
Join Date: Mar 2016
Posts: 4,058
In the garage:
Reputation: 0 Dr M3an M3 is on a distinguished road
Location: Columbia, SC

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by m3 hal View Post
It may feel more responsive since the center bearing joint was deleted, but if you're suggesting a gain in power, then it came from something other than the weight loss.
Going off of this...I am also not sure I am seeing the connection of this product and "faster SMG shift times." Someone help me understand this...
Quote:
The shifts are now so fast that I can't even make micro adjustments because by the time I even think about it, its already in gear.
__________________
2004 E46 ///M3 - Oxford Green Metallic II + Cinnamon SMG
IG: DrM3anM3

Mods: Genuine OE CSL Bumper, Both Karbonius and Streamline CSL Airboxes, OE CSL Snorkel w/ working Flap, OE Map Sensor + OE Air Rail, Paul Claude Custom Tune, CSL Engine management with CSL converted DME, Supersprint V1 Stepped Headers w/ Oversized HJS Race Catted section 1, SS 2.5" Twin-Piped Oversized Custom section 2, Custom Oversized Supersprint muffler, Catcam's Billet 280/272 cams, WPC treated rod-bearings, VinceBar (weld) + Redish Plates, Full Beisan VANOS lockdown, BBS LMs w/ PSS, Brembo GT6 (front) + GT4 (rear) BBK, CSL style CF diffuser, Vorsteiner CF CSL Bootlid, CSL SMG Engine DME tune, CSL '255' SMG DME tune, SMG Pump Relocated.
For Sale: Supersprint Oversized Catless Section 1
Active Group-Buys (PM if Interested):
Camshaft Group-Buy, OE CSL Bootlids, Supersprint Headers/Exhaust thread, New Supersprint Oversized Twin-Piped Section 2

Last edited by Dr M3an M3; Mon, Jan-14-2019 at 07:22:49 PM.
Jump to top Dr M3an M3 is offline   Reply With Quote
Old Mon, Jan-14-2019, 07:44:19 PM   #37
Pdelamare
Registered User
 
Join Date: Dec 2018
Posts: 19
Reputation: 0 Pdelamare is on a distinguished road
Location: UK, Milton Keynes

United Kingdom




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by terraphantm View Post
Stock is 8.5 kg (18.73 lbs) according to realOEM. That includes the giubo, CSB, and CV joint

https://www.realoem.com/bmw/enUS/par...&q=26112229240
Seems the E92 DCT version is 13.1kg (29lbs). This would be a substantial saving if the CF one is 5.4kg (11.9lbs). Not sure why the E92’s driveshaft is so much heavier.

http://www.realoem.com/bmw/enUS/part...&q=26102283665
Jump to top Pdelamare is offline   Reply With Quote
Old Mon, Jan-14-2019, 08:03:50 PM   #38
pbonsalb
Registered User
 
Join Date: Jun 2005
Posts: 3,982
Reputation: 0 pbonsalb is on a distinguished road





Default Re: J-Fiber E46 M3 CF Driveshaft Review

E92 M3 shaft weights I saw were 12.2 for the MFactory CF and 22.8 for the factory aluminum. Guibo not included.
Jump to top pbonsalb is offline   Reply With Quote
Old Mon, Jan-14-2019, 08:18:29 PM   #39
stash1
Registered User
 
Join Date: Dec 2008
Posts: 5,235
In the garage:
Reputation: 0 stash1 is on a distinguished road
Location: Woodstock, MD.

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

Quote:
Originally Posted by m3 hal View Post
It may feel more responsive since the center bearing joint was deleted, but if you're suggesting a gain in power, then it came from something other than the weight loss.
Then I'd suggest everyone figure out a way to remove their CSB I guess-lol In all seriousness though, I'm really not sure exactly what is responsible for the increased throttle response and seemingly quicker acceleration, but whatever it is...it's real. This isn't my review, and I have no horse in the race, just confirming what's been mentioned-take it for what it's worth.
__________________
'04 AW/IR...some mods
Jump to top stash1 is offline   Reply With Quote
Old Mon, Jan-14-2019, 08:49:29 PM   #40
dothraki
Registered User
 
Join Date: Sep 2017
Posts: 347
Reputation: 0 dothraki is on a distinguished road

United States




Default Re: J-Fiber E46 M3 CF Driveshaft Review

I would speculate the removal of the CSB is a factor among other things. The stock DS probably has some winding flex involved as well. The carbon DS being bigger in diameter also makes it more rigid when turned. All added up and with the minor weight savings is what is being felt in the reviews. Again, just all speculative since this mod is not one most folks will get to experience.
Jump to top dothraki is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 05:41:01 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright ©1999-2017 M3Forum.com
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)