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Thread: Rocket b/g

  1. #1
    Join Date
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    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?
    An army of sheep led by a lion(Trump), is mightier than an army of lions, led by a sheep(Biden).

  2. #2
    Join Date
    May 2007
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    Batavia, OH
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    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
    Droop isn't the problem.

    Arizona Speedway - 2 ........ Brushcreek -1
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  3. #3
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    Default

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

  4. #4
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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?
    An army of sheep led by a lion(Trump), is mightier than an army of lions, led by a sheep(Biden).

  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.
    An army of sheep led by a lion(Trump), is mightier than an army of lions, led by a sheep(Biden).

  6. #6
    Join Date
    May 2007
    Location
    Batavia, OH
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    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.
    Droop isn't the problem.

    Arizona Speedway - 2 ........ Brushcreek -1
    Alltech -1 .................... Eldora - 8
    East Bay - 6 .................. Richmond -1
    Florence -1 ................. Lawrenceburg -1
    Atomic -6 .................. Circle City -1
    Tazewell -1 .................. Mudlick-1
    Moler -4
    Portsmouth -3 .....................Tyler Co. -1

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