How to adjust control arms that use shims?

Here’s how to adjust control arms that use shims: If the pivot shaft is inboard of the frame, adding shims causes the top of the tire to lean inward, increasing negative camber. Removing the shims causes positive camber, or an outward lean.

What are the front control arms for SPC?

SPC Performance offers preassembled adjustable front upper control arms in the most ­popular configurations for circle track, road racing and drag applications. These arms are fully adjustable and can give you all the camber and caster change you need to fine tune your alignment for any track.

Which is better for alignment spindles or control arms?

(This is discussed on the coil spring page). Camber adjustment takes place with the upper control arm, a primary reason why control arms have such an advantage over spindles (this is discussed on the control arm page). Spindles do not have any effect (good or bad) on the alignment.

What are the requirements for a wheel alignment system?

• Racking system must have jacking capability. • Racking system must be capable of level to 1.6 mm (1/16 in). • Appropriate wheel stops and safety certification. • Built-in turn plates and slip plates. • Wheel clamps capable of attaching to 20″ or larger wheels • Racking capable of accepting any GM passenger car or light duty truck.

(This is discussed on the coil spring page). Camber adjustment takes place with the upper control arm, a primary reason why control arms have such an advantage over spindles (this is discussed on the control arm page). Spindles do not have any effect (good or bad) on the alignment.

What should I know about GM wheel alignment?

Important:PLEASE FAMILIARIZE YOURSELF WITH THESE UPDATES BEFORE PERFORMING YOUR NEXT GM WHEEL ALIGNMENT SERVICE. The following key steps are a summary of this bulletin and are REQUIRED in completing a successful wheel alignment service.

What are the specifications for four wheel alignment?

• Computerized four wheel alignment system. • Computer capable of printing before and after alignment reports. • Computer capable of time and date stamp printout. • Racking system must have jacking capability. • Racking system must be capable of level to 1.6 mm (1/16 in).

What happens when you move the upper control arm?

So moving the upper control arm in or out (relative to the frame) is how camber is controlled. Moving the upper arm out gets you more positive and moving it in results in negative camber. If camber is out of adjustment you will see uneven tire wear, if the camber is too negative for example then the tire will wear the inside tread.