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12-06-2013, 11:40 AM | #1 | |
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See Why the M3 M4 Carbon Fiber driveshaft is so cool (video on CFRP drive shafts)
Featured on BIMMERPOST.com I am a big car guy but a CFRP drive shaft was a new application of the material that I had never seen before so needless to say, I am kinda excited about stuff like that. Things like this are just part of what makes these cars special. I totally forgive BMW for not making the engines at a bespoke plant since they used the cost savings to reward us with things like this. From the official BMW M3/M4 press release (from Official Thread): Quote:
Some photos from Official Thread.
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12-06-2013, 12:01 PM | #2 |
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That was cool! Never seen a stress test on steel vs CF on car parts.
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12-06-2013, 01:02 PM | #4 |
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I'd love to see a static load test on all of the "lightweight" wheels people buy.
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12-06-2013, 01:05 PM | #5 |
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wow thats crazy! very cool
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12-06-2013, 03:35 PM | #7 |
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12-06-2013, 04:01 PM | #8 |
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Excellent video. You can have significantly lighter and significantly stronger in a single part. That is the "magic" of composites. The slightly disappointing story is that Nissan have put these on relatively pedestrian passenger vehicles for close to a decade. BMW is not leading the way here with a bleeding edge technology. I know you did not claim they were, but I think it is still relevant.
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12-08-2013, 03:53 PM | #11 |
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cool, My RX8 had a CF drive shaft also.
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12-08-2013, 04:45 PM | #12 |
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Thanks for sharing. That was a great video.
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12-08-2013, 06:22 PM | #13 |
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12-08-2013, 06:53 PM | #14 |
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Thanks, I had a preconception the carbonfiber drive shaft would shatter all over. It just broke. Curious how much the BMW M3/4 CFRP drive shaft can handle.
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12-08-2013, 07:12 PM | #16 |
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I just read today in roundel that the CF driveshaft is so stiff it no longer requires a center bearing - is that accurate?
I'm really intrigued to drive this. Anytime you dramatically reduce the weight of an integral rotating part, the feeling of direct-response increases. The flywheel is probably the most classic example. But the driveshaft has always been the longest rotating part of the assembly and the most prone to torsional forces as a result - so now I'm really curious how a super stiff super lightweight driveshaft feels in a high torque application. |
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12-08-2013, 08:29 PM | #17 |
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They are clearly focussing on parts that will free up the drivetrain and increase responsiveness
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12-08-2013, 11:47 PM | #19 |
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Terrific insight, thanks for sharing. Makes you wonder why BMW feature this technology in the E90's.
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12-09-2013, 01:57 AM | #21 | |||
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Quote:
Quote:
Quote:
In short slightly more performance, non detectable.
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12-09-2013, 02:07 AM | #22 |
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That would be super impressive, considering it came out 4 years ago.
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