Swapping for a cf driveshaft

jonf49 · 10-30-2023, 12:08 AM

Is it common to swap bmw steel driveshafts for bmw cf driveshafts on say a 2019 M4 ZCP?

theweebabySeamus · 10-30-2023, 11:40 AM

I haven't seen it done, but would be possibly interested in your stuff if you swap for a CF.

jonf49 · 10-30-2023, 07:27 PM

So I guess it hasn’t be done?

theweebabySeamus · 10-31-2023, 01:39 PM

I haven't been able to find any info on the process, even in ISTA. I'd love to find a tech that's done the swap either direction to pick their brain.

SYT_Shadow · 10-31-2023, 02:08 PM

The nice thing about this swap is, if you get oem, you know it actually works.
Over in the e9x world, many aftermarket cf driveshafts have been tried and they are all or mostly shit

jonf49 · 10-31-2023, 03:28 PM

Yeah, but does anyone know if it is a common mod with the oem cf driveshaft?

alex2364 · 10-31-2023, 03:29 PM

No.

Track/S · 10-31-2023, 03:53 PM

Quote:

Originally Posted by jonf49

Yeah, but does anyone know if it is a common mod with the oem cf driveshaft?

If it were mine I would do it without hesitation.

SYT_Shadow · 10-31-2023, 04:00 PM

if my car didn't have it already, I wouldn't hesitate. All the advantages of CF driveshafts and none of the disadvantages, as you can buy an OEM BMW CF one that actually works!

TractionControlDelete · 10-31-2023, 04:27 PM

Quote:

Originally Posted by SYT_Shadow

if my car didn't have it already, I wouldn't hesitate. All the advantages of CF driveshafts and none of the disadvantages, as you can buy an OEM BMW CF one that actually works!

It’s a no brainer, if possible. Watching this space as it’d be great to have in a relatively affordable F83 I picked up but that doesn’t have it

theweebabySeamus · 10-31-2023, 04:33 PM

Quote:

Originally Posted by SYT_Shadow

if my car didn't have it already, I wouldn't hesitate. All the advantages of CF driveshafts and none of the disadvantages, as you can buy an OEM BMW CF one that actually works!

I'm not so sure there's no disadvantage, I have an idea a lot of the vibration issues on the early cars is from the CF driveshaft. Hence my desire to swap to steel.

Track/S · 10-31-2023, 04:38 PM

Quote:

Originally Posted by theweebabySeamus

I'm not so sure there's no disadvantage, I have an idea a lot of the vibration issues on the early cars is from the CF driveshaft. Hence my desire to swap to steel.

There are 3 versions of CF shafts, I suppose one of them managed to eliminate this problem, I imagine it would be a balance issue.

I would never swap from CF to steel

TractionControlDelete · 10-31-2023, 04:47 PM

Quote:

Originally Posted by theweebabySeamus

I'm not so sure there's no disadvantage, I have an idea a lot of the vibration issues on the early cars is from the CF driveshaft. Hence my desire to swap to steel.

I’ve now had 3 M4s. A 2015 F82 (CF driveshaft), 2018 F82 (CF driveshaft), and now 2019 F83 (steel obviously). I can confirm that all vibration was related to the diffential bushings. I’m all in on the CF driveshaft and have had no issues with it after over 8 combined years of use.

theweebabySeamus · 10-31-2023, 05:06 PM

Quote:

Originally Posted by Track/S

There are 3 versions of CF shafts, I suppose one of them managed to eliminate this problem, I imagine it would be a balance issue.

I would never swap from CF to steel

I imagine the difference is minimal at most, I'd gladly switch IF it were the cause of the vibration.

Good info on the different updates though, thanks. I'll definitely check into that option.initely

Track/S · 10-31-2023, 05:10 PM

Quote:

Originally Posted by theweebabySeamus

I imagine the difference is minimal at most, I'd gladly switch IF it were the cause of the vibration.

Between the first version and the second, there is a lot of difference.
What type of vibration do you have and at what speeds?

jonf49 · 10-31-2023, 08:53 PM

So, if it’s not an available swap just find some other way to mod or tune the car to compensate. If I recall after speaking to a serious f82 drag racer, the steel driveshaft is better equipped to handle the additional power. Having said that, if I wasn’t going to tune, I would presume the carbon fiber driveshaft saves a little weight and causes slightly faster revving. I’m gonna see if the local shop does the swap. If not it’s not the end of the world. As some have already said lighter wheels can help make up for the difference. But, I see tuning in my future.

theweebabySeamus · 10-31-2023, 09:25 PM

Quote:

Originally Posted by Track/S

Between the first version and the second, there is a lot of difference.
What type of vibration do you have and at what speeds?

Undercar and steering wheel. Replacing the v1 rear diff bushing helped but didn’t fix.

jonf49 · 11-03-2023, 11:09 AM

Found a shop that does it. Not sure it’s worth the trouble or if it could lead to any future issues. Car feels fast with the metal one, but we’ll see what they want for labor. No idea which version OEM CF driveshaft I would need to find on eBay either. There are a bunch on there.

theweebabySeamus · 11-03-2023, 01:21 PM

What shop was it?

Track/S · 11-03-2023, 02:49 PM

Quote:

Originally Posted by jonf49

Found a shop that does it. Not sure it’s worth the trouble or if it could lead to any future issues. Car feels fast with the metal one, but we’ll see what they want for labor. No idea which version OEM CF driveshaft I would need to find on eBay either. There are a bunch on there.

This

jonf49 · 11-04-2023, 10:17 AM

Quote:

Originally Posted by theweebabySeamus

What shop was it?

Quote:

Originally Posted by Track/S

This

[img]https://i.ibb.co/jgrhN5R/s-l1200-2.webp[/img]

Did you do the swap?

Any concerns when doing this mod?

Is there a specific name or serial number for the correct part?

jonf49 · 11-04-2023, 10:18 AM

Quote:

Originally Posted by theweebabySeamus

What shop was it?

Silicon Valley Bimmer

10-30-2023, 12:08 AM	#1
jonf49 Captain 133 Rep 831 Posts Drives: 2019 BMW M4 Competition Join Date: May 2022 Location: 94063 iTrader: (0)	Swapping for a cf driveshaft Is it common to swap bmw steel driveshafts for bmw cf driveshafts on say a 2019 M4 ZCP?
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10-30-2023, 11:40 AM	#2
theweebabySeamus Captain 373 Rep 902 Posts Drives: M3 Join Date: Jul 2014 Location: Bay Area iTrader: (1)	I haven't seen it done, but would be possibly interested in your stuff if you swap for a CF.
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10-30-2023, 07:27 PM	#3
jonf49 Captain 133 Rep 831 Posts Drives: 2019 BMW M4 Competition Join Date: May 2022 Location: 94063 iTrader: (0)	So I guess it hasn’t be done?
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10-31-2023, 01:39 PM	#4
theweebabySeamus Captain 373 Rep 902 Posts Drives: M3 Join Date: Jul 2014 Location: Bay Area iTrader: (1)	I haven't been able to find any info on the process, even in ISTA. I'd love to find a tech that's done the swap either direction to pick their brain.
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10-31-2023, 02:08 PM	#5
SYT_Shadow ///M Powered for Life 11480 Rep 10,328 Posts Drives: E90M/E92M/M4GTS/M4GT4/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	The nice thing about this swap is, if you get oem, you know it actually works. Over in the e9x world, many aftermarket cf driveshafts have been tried and they are all or mostly shit __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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10-31-2023, 03:28 PM	#6
jonf49 Captain 133 Rep 831 Posts Drives: 2019 BMW M4 Competition Join Date: May 2022 Location: 94063 iTrader: (0)	Yeah, but does anyone know if it is a common mod with the oem cf driveshaft?
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10-31-2023, 03:29 PM	#7
alex2364 Colonel 2862 Rep 2,754 Posts Drives: 2020 M4 ZCP / 2023 X3 M40i Join Date: May 2005 Location: Northern VA iTrader: (2) Garage List 2020 BMW M4 [10.00] 2023 BMW X3 M40i [10.00]	No.
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10-31-2023, 04:00 PM	#9
SYT_Shadow ///M Powered for Life 11480 Rep 10,328 Posts Drives: E90M/E92M/M4GTS/M4GT4/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	if my car didn't have it already, I wouldn't hesitate. All the advantages of CF driveshafts and none of the disadvantages, as you can buy an OEM BMW CF one that actually works! __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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10-31-2023, 08:53 PM	#16
jonf49 Captain 133 Rep 831 Posts Drives: 2019 BMW M4 Competition Join Date: May 2022 Location: 94063 iTrader: (0)	So, if it’s not an available swap just find some other way to mod or tune the car to compensate. If I recall after speaking to a serious f82 drag racer, the steel driveshaft is better equipped to handle the additional power. Having said that, if I wasn’t going to tune, I would presume the carbon fiber driveshaft saves a little weight and causes slightly faster revving. I’m gonna see if the local shop does the swap. If not it’s not the end of the world. As some have already said lighter wheels can help make up for the difference. But, I see tuning in my future.
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11-03-2023, 11:09 AM	#18
jonf49 Captain 133 Rep 831 Posts Drives: 2019 BMW M4 Competition Join Date: May 2022 Location: 94063 iTrader: (0)	Found a shop that does it. Not sure it’s worth the trouble or if it could lead to any future issues. Car feels fast with the metal one, but we’ll see what they want for labor. No idea which version OEM CF driveshaft I would need to find on eBay either. There are a bunch on there.
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11-03-2023, 01:21 PM	#19
theweebabySeamus Captain 373 Rep 902 Posts Drives: M3 Join Date: Jul 2014 Location: Bay Area iTrader: (1)	What shop was it?
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