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F8X M3/M4 CF Drive shaft mod

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    Originally posted by heinzboehmer View Post
    ~1.4 kg (~17%) decrease, which means the radius can increase ~9.8% before the moment of inertia of the CF shaft is greater than the stock one (note that this is just an approximation, as the actual moment also depends on the wall thickness of each shaft).

    Elimination of CSB, increased stiffness and net weight savings are still upsides to this mod, but I have a feeling the moment of inertia between this and stock is going to be super close.
    I personally hope this mod further decreases drivetrain clunking when shifting at low-medium RPM. Anything else is a bonus. I'm thinking in conjunction with the lightweight single mass flywheel this will increase responsiveness significantly.

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      Originally posted by EthanolTurbo View Post

      I personally hope this mod further decreases drivetrain clunking when shifting at low-medium RPM. Anything else is a bonus. I'm thinking in conjunction with the lightweight single mass flywheel this will increase responsiveness significantly.
      It does increase responsiveness significantly. I have single mass + carbon driveshaft + solid rear end on my e92 m3. It feels like the rear end is bolted to the gas pedal, just going up and down the rev range is a pleasure in itself. once you drive the car set up this way, going back to stock trim the car feels lethargic and lazy.

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        Any new updates on this new development?­čśü


        Sent from my iPhone using Tapatalk Pro

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          Originally posted by Radekxpl View Post
          Any new updates on this new development?­čśü


          Sent from my iPhone using Tapatalk Pro
          Still haven't had time to install and test it, should be done this week.

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            Are the flanges or driveshaft different for a 6sp and SMG?

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