F8X M3/M4 CF Drive shaft mod

[x Spades x]

Bump. FINALLY Installing my revised F8x CF driveshaft this week and will be able to test and provide the details. Stay tuned.

Where did you get yours installed again?

[Obioban]

Please drive irresponsibly quickly, assuming it feels smooth.
(since driveshaft speed is proportional to road speed, not engine speed).

not sure how viable it it for you, but I’d really like to know its smooth to at least 150, and ideally 175 (indicated).

[EthanolTurbo]

Bump. FINALLY Installing my revised F8x CF driveshaft this week and will be able to test and provide the details. Stay tuned.

[0-60motorsports]

Found a guy from Ontario on IG that has a pic with this mod done from February. Profile is @velart_motorsport
I don't know him, but if anyone here is looking for a good shop in North America to get this done, he might be worth reaching out to.

Mine now has 3500km on it and is still working fine. It survived a ring trackday, so full load is not an issue 😂

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Shipping to and from Canada is ridiculously high especially to Bahrain.

[Mike RT4]

Found a guy from Ontario on IG that has a pic with this mod done from February. Profile is @velart_motorsport
I don't know him, but if anyone here is looking for a good shop in North America to get this done, he might be worth reaching out to.

Mine now has 3500km on it and is still working fine. It survived a ring trackday, so full load is not an issue 😂

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The drive-shaft is probably wondering where all the torque went .

[Altaran]

Found a guy from Ontario on IG that has a pic with this mod done from February. Profile is @velart_motorsport
I don't know him, but if anyone here is looking for a good shop in North America to get this done, he might be worth reaching out to.

Mine now has 3500km on it and is still working fine. It survived a ring trackday, so full load is not an issue 😂

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[x Spades x]

Bump!

[CrisSilberGrau]

Any more updates from the ones that have installed this mod? I have my 7629 being shipped soon. Need to see what is the best way to go about installing it.

[bigjae46]

Jae, know of any shops in Houston who could take on the most recently posted configuration by spool1?


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I wouldn't trust anyone in Houston. I think Driveshaft Specialists are in San Antonio, don't see why they couldn't handle it. Not sure if they can dynamically balance the shaft which is the reason why the shop that EthanolTurbo used which is apparently a spinoff of Powertrain Industries would be the best option.

[fattycharged]

I think so.

Jae, know of any shops in Houston who could take on the most recently posted configuration by spool1?


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[Altaran]

Yes that's correct, no heat shield.

I am running the heat shield. I had to bend it at certain sections to prevent contact, but it's easy to do when underneath and the car is out of gear. Just turn the wheels and listen if there is a grinding noise from heat shield contact.


Btw, I tracked my car on Monday, no issues with the CF shaft.

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[1spool]

No rubbing, if you remove the heat shield.
Or you revisited your initial install and are now running the heat shield?


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Yes that’s correct, no heat shield.

[fattycharged]

No rubbing.

No rubbing, if you remove the heat shield.
Or you revisited your initial install and are now running the heat shield?


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[1spool]

So this DS will rub on something or it won't?

No rubbing.

[1spool]

Did your revised, shortened driveshaft allow you to install without loosening the diff?

Yes.