8 replies to this topic

[The German]

Dear Torana friends,

i had contact with SPC USA about adjustable control arms.

Here is a idea from Chris .

You will need to order components individually, as none of our arms that use the 5” cross shaft (Hole spacing) will work for you.
We don’t sell direct, but you can find the parts at many places that will ship to Germany.
It looks like Summit Racing has the best prices on these parts right now.

For each arm, you will require:
1x 94100 5” cross shaft w/pivots ($100)
1x 92006 Midsize Ball Joint plate ($30)
1x 94040 Hardware kit ($52)
2x 92040 3-3/4” Adjusting sleeve ($12ea)

Both the hardware kit and the cross shaft kit will include pivots, but this will get you an extra set of pivots with bushings, which you can then keep as spares if you ever need to replace them, since they are not standard parts.
You will use your current Moog 5108 upper balljoints.
This should give you an arm that will adjust in length from about 7”-9”, as you measured from the center of the cross shaft to the center of the balljoint. That should be more than enough to give you 0 to -4 degrees of camber, and allow you to add some caster also, which will improve the handling!

Chris

Could be something for you............

Uwe

Edited by The German, 11 June 2012 - 05:10 AM.

[ls2lxhatch]

The upper control arm has to step around the k-frame. This will make it more difficult to use parts from other cars.

You may be able to use the components above but make your own ball joint plate.

The McDonald Bros LX arms will give you and idea of the shape required. The UC version with the offset ball joint is more difficult again.



SPC example just to give you and idea. The arms are too close together near the ball joint which would cause the arms to hit the k-frame.

Edited by ls2lxhatch, 11 June 2012 - 11:10 AM.

[The German]

Would be good to get the McDonald bros arm with a adjust system like SPC has,saves adjusting work.


Is the K frame issue already tested with a SPC like system?.


Uwe

[ls2lxhatch]

The McDonald Bros arms basically follow the shape of the k-frame at full rebound, it would seem unlikely that a straight arm would work. I have the arms mounted in the A9X position with HQ stub axles.
I can take a picture later.

It would be relatively simple to take some measurements and see if the SPC system will go close to fitting with your setup. It will depend to some extent on the height of cross shaft mounting, the width of the cross shaft and the amount of rebound travel you want.

I have adjusted the McDonald Bros to a base setting using the rod ends and then shimmed to fine tune the alignment as they are difficult to adjust. There is very little castor adjustment available in the arms due to the type of rod end used. If you were to fit spherical bearing rod ends then the McDonald bros arms would have more castor adjustment.

[76lxhatch]

I think it may come close but not quite; it certainly wouldn't need as much clearance as the McDonald Bros arms (the factory ones fill in a lot of the space inside the tubing). Its certainly going to be easier to get more caster adjustment out of the SPC style arm regardless of the pivot joint type, perhaps it might be possible to run slightly shorter adjusting rods and put a fixed extension at right angles from the pivots.

[ls2lxhatch]

You could run into problems with rim clearance. Rim clearance will be a bigger problem with Torana stubs than it would be with HQ stubs.

It would not be that difficult to mock up a control arm out of PVC, dowel and plywood with similar dimensions to the SPC components to see if it will go close to fitting.

You will also need to workout what you are going to do for a rebound bump stop which is also an issue with the McDonald Bros arms.