Quick offset bush question

Discussion in 'Suspension, Steering and Chassis' started by Valvebounce, Sep 12, 2018.

  1. Valvebounce

    Valvebounce Well-Known Member

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    Sorry if this has been discussed before.
    But when fitting the offset upper control arm bushings, Do you fit them to the front, the rear, or both bush pockets (With diametrically opposed offsets) in the arm?
    They're sold as a pair. So I was wondering if maybe running them both cranked up the castor too much?

    Thanks in advance.
     
  2. Steven190

    Steven190 FABO Gold Member FABO Gold Member

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    From what I am told 3 to 4 degrees camber is what you are shooting for. Is your upper control arm's stock?
     
  3. Frnknsteen

    Frnknsteen FABO Gold Member FABO Gold Member

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    I ran them (one pair in each upper control arm) in my Barracuda. I asked the alignment shop to give me -.5 - -1 degree of Camber and as much caster as possible. I ended up with -.89/-.90 of camber (driver/passenger) and +4.90/+4.89 of Caster (Driver/Passenger). Probably didn't need that much caster (or camber) but the car is driving nicely, no pull, and even with manual steering and faster 20:1 ratio steering box, it isn't hard to drive ( a little hard at a stop, but fine once moving).

    Remember that just because you put the offset bushings in, you can still adjust for camber and caster by offsetting them. It might be difficult to get much negative caster, but you don't want that anyway.

    Just make sure you don't follow the installation instructions that come in the box. They are wrong. You want to install them in the control arms so that the back of the control arm is pushed in towards the frame and the front is pushed out towards the wheel, so offset bolt hole towards frame on front (pushing control arm outwards), and offset bolt hole out towards wheel on the back (pushing control arm in towards frame). This rocks balljoint backwards and increases caster.
     
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    • Valvebounce

      Valvebounce Well-Known Member

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      Thanks.
      yeah the top arms are standard. I understand that the goal is to Crank the ball joint rearward to gain castor. I was just concerned that having both might push it too far.