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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 Fri, Jul-22-2016, 05:37:50 AM   #41
stash1
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Default Re: New CF Driveshaft ComingTo Market

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Originally Posted by DiXiS 18 View Post
Where are these being manufactured?
I have a PM in now...
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Old Fri, Jul-22-2016, 05:41:19 AM   #42
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Default Re: New CF Driveshaft ComingTo Market

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Originally Posted by Paulo M View Post
so how much does the factory one weigh again?
Sooo, I haven't removed mine yet to weigh it, but according to previous threads, it's either 19 lbs or 27 lbs. Personally, I bet it's closer to the 27 lb. number.
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Old Fri, Jul-22-2016, 06:03:29 AM   #43
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Default Re: New CF Driveshaft ComingTo Market

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so how much does the factory one weigh again?
18lbs i believe. Only the driveshaft.
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Old Fri, Jul-22-2016, 06:13:30 AM   #44
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Default Re: New CF Driveshaft ComingTo Market

I don't get the appeal of cf shafts. 1.5k for next to nothing in weight savings, and pretty much nothing in power gained.. Unless it's for bling ..I mean i want one too but I don't know why

Last edited by HassanEido; Fri, Jul-22-2016 at 06:16:50 AM.
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Old Fri, Jul-22-2016, 09:55:40 AM   #45
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Default Re: New CF Driveshaft ComingTo Market

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I don't get the appeal of cf shafts. 1.5k for next to nothing in weight savings, and pretty much nothing in power gained.. Unless it's for bling ..I mean i want one too but I don't know why


You hit the nail right on the head....wtf is the point of this waste of money....if you guys are throwing away money I'll send you my paypal lol


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Old Fri, Jul-22-2016, 11:01:44 AM   #46
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Default Re: New CF Driveshaft ComingTo Market

They are actually a pretty decent upgrade from what I've read. Yes the overall weight savings is basically nothing compared to the weight of the entire car but knocking 10-15lbs out of your driveline's rotational mass will be HUGELY beneficial in applying more power to the pavement.

The really big benefit, which I didn't see anyone mention is carbon's ability to flex. One engineering video I saw said a carbon DS can deflect up to 15 degrees when a shock load is applied. This will absolutely benefit diffs, axles, traction, RACPs, etc
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I like it on mine, tips didn't line up perfect, but good enough. Its off a newer car that makes more power so I know it makes more power on my car.

You can make a custom flange to connect it to your stock header with JB weld.

Sound is an 8/10, I was expecting it to sound like a V8 since its a V8 exhaust. It doesn't, anybody know why this is? Does it have to do with how I installed it?
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Old Fri, Jul-22-2016, 11:51:29 AM   #47
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Default Re: New CF Driveshaft ComingTo Market

Good read for those who want to know the benefits of a CF driveshaft

Summary
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The reason to change out the drive shaft to a Aluminum or Carbon Fiber unit is quite simple, it is to reduce rotational mass and increase response.

“All driveshafts twist to some degree when torque is applied. The resistance to this twist is measured as torsional spring rate. Standard carbon driveshafts have a torsional spring rate a little less than aluminum and about half that of steel. The advantage of a lower spring rate is less driveline shock and a reduction of stress on other drivetrain components, as well as increased traction.”

Weight Savings means that your engine spends less energy rotating the driveshaft and more energy on spinning the tires. This in turn decreases drivetrain power loss and increases power at the wheels. So even though your car is not making more power, its able to transfer more of it to the wheels increasing performance, drive-ability, and response.

The vehicle was much more pleasant to drive in very low RPM with no more bucking or shacking, and it was much more eager to accelerate even at partial throttle. Throttle input response was also drastically increased with less “dead” time between when the throttle was applied to when the vehicle started to accelerate. As for all out acceleration, well the thing is MUCH faster then compared to the way the car was with a stock driveshaft. The vehicle is much more eager to go through the RPM range at a much faster rate, meaning that its accelerating faster. The shifts where also crisper and faster as up shifts and down shift delays where cut to a minimal in terms of hard downshifting and fast upshifts.
And here was a simple before and after dyno. Different car, same principle. Their stock unit weighed 27lbs and the CF one was 13.4lbs.
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Last edited by gojcaj; Fri, Jul-22-2016 at 11:55:51 AM.
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Old Fri, Jul-22-2016, 12:33:03 PM   #48
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Default Re: New CF Driveshaft ComingTo Market

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You hit the nail right on the head....wtf is the point of this waste of money....if you guys are throwing away money I'll send you my paypal lol




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You are misinformed sir, long story short, CF shaft will prolong the life of your driveline and improve overall application of power. The weight loss is the least important in all this.

Edit: someone beat me to the punch^^^
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Old Fri, Jul-22-2016, 12:37:28 PM   #49
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Default Re: New CF Driveshaft ComingTo Market

Someone should tell BMW they ****ed up, putting the CF shaft in the F8X M3/4s. Blingy waste of money!

A friend of mine did one in his STI years ago. The NHV benefit was absurd. Plus easier on other components and mildly less drivetrain loss.

How often can you do a mod that's only better, without something compromised, on these cars? Very rarely!
(once we get one that is actually done correctly)

I don't think it can be considered blingy if nobody can ever see it
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Old Fri, Jul-22-2016, 12:44:35 PM   #50
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Default Re: New CF Driveshaft ComingTo Market

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You are misinformed sir, long story short, CF shaft will prolong the life of your driveline and improve overall application of power. The weight loss is the least important in all this.

Edit: someone beat me to the punch^^^


Prolong the life.....I've seen m3's putting around here with factory drive trains and 300k lol and drive just as great as it from the factory.....despite our already shitty diff...


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Discussing New CF Driveshaft Coming To Market 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)