CF shaft VS steel shaft video

Discussion in 'GT350 and S550 Technical Forum' started by spartan, Jan 22, 2019.

  1. spartan

    spartan TMO Race

    Messages:
    453
    Likes Received:
    791
    Joined:
    Dec 16, 2017
    Location:
    Michigan
    Impressive comparison.
     
    AustinGT350, TymeSlayer and byronj like this.
  2. VoodooBoss

    VoodooBoss Rick Moderator

    Messages:
    20,055
    Likes Received:
    2,495
    Joined:
    Nov 30, 2010
    Location:
    90 Miles East of Sonoma Raceway
    Yep that’s impressive. So the last two GT500’s have CF driveshafts but not the GT350. Because of the vibrations from the FPC?
     
  3. byronj

    byronj TMO Addict

    Messages:
    1,382
    Likes Received:
    326
    Joined:
    Jul 17, 2012
    Location:
    Bay Area
    I’ve wondered the same thing about the GT350 driveshaft. It could have been a cost savings for the project as well.
     
  4. domesticpower

    domesticpower Track Addict

    Messages:
    108
    Likes Received:
    50
    Joined:
    Jun 12, 2013
    Location:
    NS
    It likely is a result of higher torque and rotational speed with the GT500. The current and last GT500's are supercharged and make a lot more torque than the GT350. They are also more powerful and capable of higher top speeds. The driveshaft is after the transmission so its rpms are tied to the tires (with a speed multiplier equal to the rear gears/axle ratio). The GT350 may rev a lot higher, but the GT500 driveshaft should see higher rpms as a result of more tire rpms because of the higher top speed.
     
  5. VoodooBoss

    VoodooBoss Rick Moderator

    Messages:
    20,055
    Likes Received:
    2,495
    Joined:
    Nov 30, 2010
    Location:
    90 Miles East of Sonoma Raceway
    The GT350 revs a bit higher but the GT500 has taller 20” wheels so there shouldn’t be a huge difference in driveshaft RPM’s.
     
  6. domesticpower

    domesticpower Track Addict

    Messages:
    108
    Likes Received:
    50
    Joined:
    Jun 12, 2013
    Location:
    NS
    True, although ultimately the speed of the driveshaft will be limited by how fast the car can go and the wheels can turn. I think I read that the GT350 tops out under 180 mph whereas the last GT500 topped out over 200 mph and I'm sure this one will as well so higher rpms for the driveshaft (a bit offset by the taller wheel and tire like you said).
     

Share This Page