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Pinion Angle Help

Discussion in 'Race car chassis tech' started by Todd Borland, Apr 26, 2004.

  1. Todd Borland

    Todd Borland Buicktodd

    Well finally getting ready to actually check it and scale the car this week after I change rear springs. I'm running Southside lowers without dropdown brackets and Art Morrison adj uppers that I bought from Tom Rix and just put on with his adjustments, and the HR Parts-n-Stuff swaybar. Just wondering the desired pinion angle for my combo.
     
    Todd Borland, Apr 26, 2004
    #1
  2. frtlnrbuick

    frtlnrbuick Midwest Mafia

    Dangle angle of the pinion

    Todd:

    Since it is still of the four link persuasion, the recommended pinion angle should still be 3 to 4 degrees down.

    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.

    (edited to remove stupidity) (I don't know what I was thinking):eek2:

    Good luck, and see you in Kearney!

    Jim
     
    Last edited: May 13, 2004
    frtlnrbuick, Apr 26, 2004
    #2
  3. GS Kubisch

    GS Kubisch THE "CUT-UP" BUICK

    Don't get caught up in "Pinion Angle affecting traction"......This is a common misconception.
    Your instant center is what affects the "Hit" on the tires at the starting line.
    You will want 2-3 degrees pinion angle but this should be in relation to the tailshaft of the transmission....Not the Driveshaft.

    Good article on this topic:
    http://buickperformance.com/Pinion.htm
     
    GS Kubisch, Apr 26, 2004
    #3
  4. Todd Borland

    Todd Borland Buicktodd

    Thanks Gary,

    PM your address so I can send you the TA 1559A cam bearing.
    Good Luck at Norwalk.
     
    Todd Borland, Apr 26, 2004
    #4
  5. Todd Borland

    Todd Borland Buicktodd

    I checked it and I was at -5 degrees, evened up the uppers and put regular springs back in and I'm sitting at -4 degrees now. Adjusted the HR Parts-N- Stuff swaybar so there is 0 preload. If the weather permits I will be going to the track on Sunday.
     
    Todd Borland, Apr 29, 2004
    #5
  6. Todd Borland

    Todd Borland Buicktodd

    OK, made a few adjustments after going to the track I put the Moroso springs back in, didn't like the cargo coil ride height or hook. Is this correct with the car on jackstands with suspension loaded my tailshaft is 6 degrees down and the pinion is 4 degrees up my understanding is this is 2 degrees pinion angle. When I went to the track the car just didn't seem like it transfered the weight like it did with the Moroso springs I spun real bad ended up with 10.77 @ 124.85 with 1.60 60' what I gained with the Super Sucker spacer went out the window because I wasn't able to use my ram-air (working on a new one now) and I spun. :3gears: Just a few last minute tweaks before BG.
     
    Todd Borland, May 12, 2004
    #6
  7. OUTRAGEOUS

    OUTRAGEOUS Well-Known Member

    Todd, i had the same issues with pinion angle. I broke a tailshaft housing in Norwalk. From my understanding, you DO NOT want the pinion up & the tranny down. Will create a bind in the driveline. You want both (tranny & pinion) in the same direction. Tranny shields etc prevent you from getting the trans up where it should be. (my situation) Usually, tailshafts are -4 or -5 from factory. I can give you more ideas if you wish, throw me a PM, like i said i had the same trouble recently. Randy
     
    OUTRAGEOUS, May 16, 2004
    #7

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