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Thread: pinion angle and ladder bar setup?
          
   
   

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  1. #1
    gottabuild1 is offline CHR Member Visit my Photo Gallery
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    pinion angle and ladder bar setup?

     



    Here is a drawing i have made, sorry it sucks, wondering what the pinion angle should be in relation to the driveshaft, the ground, ladder bars?
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  2. #2
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
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    with the lower bar level to the ground i run the pinion down 2/3 deg down
    Last edited by pat mccarthy; 10-29-2007 at 12:37 PM.
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  3. #3
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    I'm with Pat, 2 to 3 down.
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  4. #4
    41willys's Avatar
    41willys is offline CHR Member Visit my Photo Gallery
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    Simple answer to lower bar position initial setup.

    Draw a line from tire contact patch throught athe C/G Center of Gravity calculated height. adjust the front pivot point to intersect that line. engine HP and bar length will dictate how hard you shock the tires, then adjust up to down to get best launch and 60'.
    Use your upper rear adjustment to get pinion angle.
    John

  5. #5
    gottabuild1 is offline CHR Member Visit my Photo Gallery
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    thanks for all of the help guys, i am going to stick with the ladder bars as it is somewhat of a budget build and i am not moving the frame rails and will be running 10.5'' street tires

  6. #6
    gottabuild1 is offline CHR Member Visit my Photo Gallery
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    Hey dave severson, 10,000 posts? dang thats alot

  7. #7
    gottabuild1 is offline CHR Member Visit my Photo Gallery
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    denny, 11,000 posts ? WOW

  8. #8
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    Quote Originally Posted by gottabuild1
    Hey dave severson, 10,000 posts? dang thats alot
    I've been here awhile.....
    Yesterday is history, tomorrow is a mystery, Live for Today!
    Carroll Shelby

    Learning must be difficult for those who already know it all!!!!

  9. #9
    Henry Rifle's Avatar
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    What kind of springs are you using? If they're leaf springs, you'll need sliders to keep from binding up the rear suspension.

    BTW, Dave started posting back when computers were kerosine-powered.
    Last edited by Henry Rifle; 10-29-2007 at 07:55 PM.
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  10. #10
    SBC's Avatar
    SBC
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    wondering what the pinion angle should be in relation to the driveshaft
    The pinion angle is a function of the tranny output shaft angle.
    If the tranny is down 2 degrees, the pinion should be up 2 degrees.

    Typical universal joints are designed to operate within 3 degrees of offset.
    Any angle beyond that may cause binding.

    An angle of 0 will not cause the u-joint needle bearings to rotate as they should upon proper installation.

    BTW, Dave started posting back when computers were kerosine-powered.
    I'm pretty sure Dave had an Eniac account in 1955.
    There is no limit to what a man can do . . . if he doesn't mind who gets the credit. (Ronald Reagan)

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