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what is the kingpin angle on ford straight axle

Discussion in 'The Hokey Ass Message Board' started by indyfab, Jan 12, 2010.

  1. indyfab
    Joined: Nov 8, 2008
    Posts: 12

    indyfab
    Member

    i need to know what the offset angle is for a ford straight axle on the kingpins in relation to the axle itself, i am thinking of building my own axle but i don't want to buy an axle just to get this info. any help is appreciated.
     
  2. Thorkle Rod
    Joined: May 24, 2006
    Posts: 1,392

    Thorkle Rod
    Member

    Hey Newbie:
    That's what the search ****on is for. All your answers are there. I am sure that you will spend more money and time trying to make a dangerous suspension part that is avaible every where at a reasonable cost.
     
  3. Ole don
    Joined: Dec 16, 2005
    Posts: 2,915

    Ole don
    Member

    It depends on tire and wheel size. The top of the kingpin needs to lay back a minimum of 4 degrees. If the car is to be used at very high speeds, triple that. Viewed from the front, draw an imaginary line through the king pin to the ground. Another imaginary line through the tire wheel combo must meet the first line at the ground, not below or above. Bias ply tires will want 1/8 to 3/16 inch toe in. Radials will want 0 to .060 toe in.
     
  4. indyfab
    Joined: Nov 8, 2008
    Posts: 12

    indyfab
    Member

    thanks for the info that is just what i need, i was going to buy a drop axle from speedway but i have all the tools to build my own axle so why not? oh by the way i did try a search for just this subject but after spending 20 minutes going through 90 posts i figured i would just ask and here you go, one post and five minutes the answer i needed thanks again
     
  5. swissmike
    Joined: Oct 22, 2003
    Posts: 1,297

    swissmike
    Member

    Did the stock Ford suspension have a "0" scrub radius. I was undertheimpression that stock suspensions usually had a scrub radius with the line thru the kinpin on the inside of the center of the tire? Anybody comment?
     
  6. wbrw32
    Joined: Oct 27, 2007
    Posts: 7,314

    wbrw32
    Member

    Indyfab; The kingpin has two different angles......caster and camber...The answer above is the caster angle only....
    Save your life and buy an axle.................
     
  7. what he wants to know is king pin inclination , not caster or camber
     
  8. pasadenahotrod
    Joined: Feb 13, 2007
    Posts: 11,772

    pasadenahotrod
    Member
    from Texas

    The angle he is looking for is sideways angle of the kingpin. That angle is 7 degrees on 35-36 Fords and likely before 28-34 and after through 48 as well.
     
  9. ELpolacko
    Joined: Jun 10, 2001
    Posts: 4,682

    ELpolacko
    Member

    Most early Ford spindle KPI is 7 degrees. But not all.

    Don't let the naysayers get you down. Post your build for tech week!
     
  10. indyfab
    Joined: Nov 8, 2008
    Posts: 12

    indyfab
    Member

    yep 7 degrees is the number i was looking for after going back and reading my first post i should have clarified better which angle i was talking about. the kingpins have to be offset from the axle itself if you think of the axle as being straight o degrees and the kingpins being 90 degrees straight up and down i would need to set up mine at 83 degrees
     
  11. Fenders
    Joined: Sep 8, 2007
    Posts: 3,921

    Fenders
    Member

    buy a part = streetrod
    build a part = hot rod
     
  12. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,009

    Mr48chev
    ALLIANCE MEMBER

    It's seven degrees except on the 36 axles which were 8-1/4.

    This page has some real good Ford transverse spring I beam info that is well worth bookmarking or saving. http://www.ozrodders.com/board/viewtopic.php?t=13788&sid=0218341c0143e5492733db12dd1912a8

    Looks like the answer was posted while I was digging it out of my bookmarks.

    I'm with the other gent who said that unless you have the proper skills including welding it is probably better buy rather then build.
     
  13. hotrod40coupe
    Joined: Apr 8, 2007
    Posts: 2,561

    hotrod40coupe
    Member

    Buy a forged one, you will be much safer and happier.
     
  14. wood470
    Joined: May 21, 2008
    Posts: 226

    wood470
    Member

    All that can happen is the front wheels might fall off. Wouldn't be the first time. Give it a shot
     
  15. Thorkle Rod
    Joined: May 24, 2006
    Posts: 1,392

    Thorkle Rod
    Member

    If you are talking about Caster the axle itself is set at 7 degrees via the cross member and spring mounting on a stock application and it can take as much as 8 1/2 degrees but, the king pin and axle are at Zero degrees in relationship to each other. If you are talking camber degrees then it depends on the spindles that you are going to use or, are you going to make them also?
     
  16. meengrinch
    Joined: Jun 22, 2008
    Posts: 518

    meengrinch
    Member
    from ipswich ma

    just a quick word on the kingpin sleeves that sealsit.com makes. look them up they work real good........
     
  17. indyfab
    Joined: Nov 8, 2008
    Posts: 12

    indyfab
    Member

    not trying to start a peeing contest or anything but yes i could make the spindles if i chose to. with a lathe, mill, tig welder, bandsaw, and a little motivation you can do almost anything
     
  18. Flatheadguy
    Joined: Dec 2, 2008
    Posts: 2,037

    Flatheadguy
    Member

    indyfab......you can stop the peeing contest right away. Tell us more about your engineering and fabricating experience and skills. Also post photos of items you have designed and fabricated in the past.
    Otherwise, some of the guys here at gonna think you're blowing smoke.
     
  19. Dale Fairfax
    Joined: Jan 10, 2006
    Posts: 2,585

    Dale Fairfax
    Member Emeritus

    MoToR's Manual says all Fords from '35-'48 have 8 deg K.P.I.





     
  20. Bearing Burner
    Joined: Mar 2, 2009
    Posts: 1,208

    Bearing Burner
    Member
    from W. MA

    I have been told that the the kingpin bosses in the axel is 8 degrees and the angle in the spindels is 9 degrees giving a 1 degree camber.
     

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