Re: \"Improvements\" made it worse?
It's not really body sway, the body is lifted, but I used very thin rubber bushings, so it's solid. Actually too solid, it transmits annoying vibration quite a bit.
The toe - I tried it in various stages from 0 to 1/2". Much more than 1/2 it wandered more, same like less than 1/2. 1/2 seemed to be optimum.
It has a sway bar already, yes it could be made heavier, but I don't think that would help much, as it's not really sway related, as far as I can tell.
Panhards are for leaf spring suspensions, this is independant.
It tracks straight fine - you can even let go of the steering wheel. But once it hits anything rough, that side "grabs" the rut or roughness and pulls toward it. Then when you pull it back you end up over-compensating and then the other side "grabs" and pulls it that way.
The only answer I can think of is modify the top end of the struts, lean them outboard some to increase negative camber, which then would cut down on the Scrub radius and increase the included angle (KPI + Camber.)
The real answer would be the modified strut angle and a spindle with the right angle to get camber back to where it belongs. That would require almost a complete re-design. It'd probably be easier to go with a coil-over double A Arm suspension rather than the struts.
To better explain what I think it is:
Draw a line through the ball joints or centerline of the strut down to the ground. Then draw a line down through the center of the tire to the ground. The contact points should end up fairly close to each other.
That's called scrub radius.
As you drive, the drag forces on the tire tend to push it back. That length, scrub radius, is leverage trying to push the tire back. Since it's the same, but opposite, forces on both sides, they negate each other going straight and smooth. But the longer the radius, the easier a rut or whatever can pull it to that side.
The wider tires and the less backspace of 1" move that tire centerline out about 2.5" ((12.5 - 9.5)/2+1,) increasing the Scrub Radius by that amount. That's alot!
I'm pretty sure that's what I'm experiencing.
I'm sure if I moved the tires in that 2.5" it would fix it, but that would require narrowing the frame by that much on either side - major surgury.
I would venture a guess that I'm not the first one to try this, I was hoping someone had come up with a cure and already offered a kit or something. Glen?