F8X M3/M4 CF Drive shaft mod

[0-60motorsports]

Figured I'd give an update.

I've now put over 1000 kilometers on my CF shaft and have zero issues. No track yet, still waiting on a Dyno tune before that.

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That's great news! Thanks for the feedback.

[Altaran]

Figured I'd give an update.

I've now put over 1000 kilometers on my CF shaft and have zero issues. No track yet, still waiting on a Dyno tune before that.

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[EthanolTurbo]

Will let you guys know as soon as I can. I have to fix the misfires that popped up last time I drove the car. My brother is most likely going to throw the driveshaft in and test it since I don't have time currently.

[bigjae46]

Any news yet? I hope this works out.

Let me know if there is still an issue. I can call Powertrain Industries and let them know their referral didn't work out. Not sure if Powertrain Industries has any relationship other than they used to work for them.

[EthanolTurbo]

Any updates?

Should have an update in a week or so.

[Bry5on]

While we’re waiting, does anyone have both outer diameter measurements handy? I’d like to do the math to quantify the stiffness benefit.

[WestBankM4]

I unfortunately did my 6-speed swap too early, I have a F8x driveshaft sitting in my garage with no one to install it. Waiting for feedback, might have to take a trip to LA soon.

[0-60motorsports]

I've decided I'm going to do this when I do the clutch on my SMG M3.

[x Spades x]

Bump...

[Nate047]

Any updates?

[x Spades x]

Bump...

Any update on this?

[x Spades x]

Waiting for an outcome on this. Received a DS from Ebay a couple of weeks ago.

[EthanolTurbo]

Any updates on how it drives with the revised DS? Thanks.

Not yet. Soon. Sorry!! It's coming.

[0-60motorsports]

It's posted on a previous page sonewhere: $776 with parts and labor.

I just would hate to see anyone spend the money I did and have issues. By the end of this week I should be able to test the car out with the shaft.

Any updates on how it drives with the revised DS? Thanks.

[e46IX]

Update: the driveshaft shop (DriveshaftPro) called me and said my driveshaft is ready for pickup. I dropped it off last week explaining the vibration issues.

Here is what they said:

"The original drawing we went off of caused the driveshaft to be too long. We shortened it by 3/8ths of an inch and rebalanced it. This should resolve any vibration issues. The CV joint wouldn't have lasted long due to this."

So whatever specs I posted above for measurements needs to be reduced by 3/8ths of an inch. 53.875 inches needs to be cut down to 53.5 inches.

Going to pick it up today on the way to Disneyland. I have to reinstall it, but it looks like OEM carbon fiber driveshafts might be back on the menu, boys. If it works without any vibration issues, I will get a quote for 5-10 of these to be done to try to get better pricing.

You get any seat time with the revised length drive shaft?