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Thread: Rocket b/g

  1. #1
    Join Date
    Aug 2018
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    5,197

    Default Rocket b/g

    The car I had previously worked on and walked away from has now landed fully in my lap. Theres a couple of issues that need addressing. The former crew chief had changed the lr underslung to xr1 demensions and ie increased the drop quite a bit. Now, the driveshaft is bottoming out and has worn the tailshaft bushing out twice. Whats my best fix.......a)shorter yoke, b) shorter shaft(it is carbon fiber), c)lessen the drop?

  2. #2
    Join Date
    May 2007
    Location
    Batavia, OH
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    13,616

    Default

    Quote Originally Posted by ZERO25 View Post
    The car I had previously worked on and walked away from has now landed fully in my lap. Theres a couple of issues that need addressing. The former crew chief had changed the lr underslung to xr1 demensions and ie increased the drop quite a bit. Now, the driveshaft is bottoming out and has worn the tailshaft bushing out twice. Whats my best fix.......a)shorter yoke, b) shorter shaft(it is carbon fiber), c)lessen the drop?
    You forgot lengthen wheelbase, tune it for less steer, move engine forward, 1000# 5th coil
    Modern Day Wedge Racing
    Florence -1

  3. #3
    Join Date
    May 2007
    Location
    Kansas
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    1,935

    Default

    A Shorter yoke doesn't make the shaft bottom out any less, just less spline on shaft

  4. #4
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    Aug 2018
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    Default

    Quote Originally Posted by MasterSbilt_Racer View Post
    You forgot lengthen wheelbase, tune it for less steer, move engine forward, 1000# 5th coil
    I actually thought about lengthening the wheelbase.

    What would be the maximum without having to change shock mounts, j-bar mounts etc?

  5. #5
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    Aug 2018
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    Default

    Quote Originally Posted by billetbirdcage View Post
    A Shorter yoke doesn't make the shaft bottom out any less, just less spline on shaft
    The owners "repair" shop told him that. I wont actually have my hands on the car for a couple weeks.

  6. #6
    Join Date
    May 2007
    Location
    Batavia, OH
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    13,616

    Default

    Quote Originally Posted by ZERO25 View Post
    I actually thought about lengthening the wheelbase.

    What would be the maximum without having to change shock mounts, j-bar mounts etc?
    I'm not a Rocket guy, so I'm not sure. I'd have to move it and check everything out for binds. I'm guessing you don't need a lot.
    Modern Day Wedge Racing
    Florence -1

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