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Thread: A way to gain positive caster?

  1. #1
    President Member starliner62's Avatar
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    A way to gain positive caster?

    I was reading the following comments from an article about a Daytona being raced in Great Britain.

    "I hope the guys took advantage of the slight adjustability in the front kingpin caster angle, achievable by installing the left trunnion (bottom outboard attachment) on the right side and vice versa to achieve maybe 4 degrees positive caster. The trunnion can be heated and bent to twist it a few degrees to conform with said angle. It is a massive and un heat treated forging that will not suffer from the experience."

    Anyone heard of this?
    Jamie McLeod
    Hope Mills, NC

    1963 Lark "Ugly Betty"
    1958 Commander "Christine"

  2. #2
    President Member bensherb's Avatar
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    Should work, assuming you have enough adjustment in the upper control arm to accept it. Moving the lower point that much might put the upper pivot into a bind so some "tweaking" could be needed there too.

  3. #3
    President Member Noxnabaker's Avatar
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    This sure could be interesting!
    Thou I'm wondering what'll happen if one end points at an angle, wouldn't the other end be further away then? For example: if you could "bend" the lower end to wards rear (if you want the king pin to tilt more) then wouldn't the top end be to much backwards & not reach its place?
    Maby I should draw to make it understandable...?


    Josephine
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  4. #4
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    Why not just try shims under the control arms..
    64 GT Hawk (K7)
    1970 Avanti (R3)

  5. #5
    President Member bensherb's Avatar
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    Quote Originally Posted by Noxnabaker View Post
    This sure could be interesting!
    Thou I'm wondering what'll happen if one end points at an angle, wouldn't the other end be further away then? For example: if you could "bend" the lower end to wards rear (if you want the king pin to tilt more) then wouldn't the top end be to much backwards & not reach its place?
    Maby I should draw to make it understandable...?
    Yes, that's what I meant about having enough adjustment in the upper control arm. The upper control arm might also need to be shimmed to sit at more of an angle to keep from binding the upper king pin pivot. It might even be nessisary to bend the upper pivot part of the king pin to keep from binding the pivot.

  6. #6
    President Member Noxnabaker's Avatar
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    The way I see it, shims might not be enough:
    (It's overdone just to show the thought)


    005.jpg
    Attached Images Attached Images


    Josephine
    -55
    Champion V8
    4d sedan

  7. #7
    Speedster Member
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    This works with late king pins. You have to cut a new keyway in the lower mount with a push broach.
    james r pepper

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