08-11-2017, 03:45 PM | #67 |
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It is true they made a big deal about CF driveshaft at the time. On the factory tour we were on in 2014, they had a machine that demonstrated how much stronger it was. But, now that I think about it, I can't remember what they were comparing it with.
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08-11-2017, 03:51 PM | #68 | |
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Good to hear you didn't get shafted. Broken driveshaft on a production car is not unheard of, albeit the shaft was an aftermarket carbon one. |
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08-11-2017, 03:55 PM | #69 | ||
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08-11-2017, 04:08 PM | #70 |
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They were comparing it to the steel one they are going to use instead, they just didn't know it at the time.
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08-11-2017, 04:10 PM | #71 |
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Ah, the magic word...aftermarket. And broken...both in the same sentence. Hmmmm.
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08-11-2017, 04:18 PM | #73 |
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The whole point was it saved weight and was stronger....I wonder if it had stopped becoming cost effective.
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08-11-2017, 04:19 PM | #74 | |
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08-11-2017, 04:20 PM | #75 |
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08-11-2017, 04:24 PM | #76 | |
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Being a two piece typically, a steel one might have a little slack in the centre u joint. A little clunk as you go from power on to power off. But as it isn't complained about in the rest of the range, no real issue. As for why, the PPF probably gets hot. If for packaging reasons it needs to sit close to the driveshaft, I can see why they would swap to steel. CF doesn't like heat. |
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08-11-2017, 04:25 PM | #77 |
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Free M3 to the guy who can tell which car has the CF driveshaft vs the new steel driveshaft in back-to-back test drives.
The "I'm not buying an M3/4 now" posts are cute. Bye Felicia. |
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08-11-2017, 04:36 PM | #79 |
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Would M4 CS production start then November 2017 to line up with steel shafted?
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08-11-2017, 04:41 PM | #81 | |
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I for one will be interested to see how weight is reduced over CF version. But I doubt BMW will dive into details. It's sort of teaching everyone how the sausage is made...and it might have some proprietary interest.
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08-11-2017, 04:42 PM | #82 | ||
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Also, for the US spec cars so is it a US law mandating this or a German one? If the US or other markets don't need them why change it, especially since the US is one of the biggest (if not the biggest) M market. |
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08-11-2017, 04:46 PM | #83 |
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Here is the link to today's press release: https://www.press.bmwgroup.com/globa...m4-convertible
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08-11-2017, 04:48 PM | #84 |
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Then why bother with the expensive of production and //Marketing of the CF ds in the first place?
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08-11-2017, 04:49 PM | #85 |
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Why is there a mention of GTS in the original press release to begin with? I thought the GTS production has stopped months ago. Is there going to be second round of GTS coming up?
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08-11-2017, 04:50 PM | #86 |
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How Pacific BMW going to spin the difference between the M2 and M4 after November, "BMW M4 features many Carbon Fiber Reinforced Plastic (CFRP) parts to reduce weight and optimize speed. Most notably is the CFRP driveshaft - a one-piece unit that reduces rotating mass for a drive with less counteractive momentum." http://www.pacificbmw.com/blog/what-...nd-the-bmw-m4/
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08-11-2017, 04:53 PM | #87 |
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Wouldn't doubt it now to further drive the premium CS/GTS M tax. End of the model cycle is approaching, so special editions galore should popping up for individual country markets, just like the M E90/92.
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08-11-2017, 05:04 PM | #88 |
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