70 Dart. Looking for More Castor, QA1 arms or Moog bushings?
Please describe what a Jacking affect is.
When you turn the steering, the inside front wheel is lowered, and the outside front wheel is raised. That in turn raises the mass of the car, and puts more of the weight on the inside front and outside rear wheel.
There's
a bunch of things that effect how much jacking you get, caster is one of them, but so is the scrub radius you have up front and the amount of camber you already have dialed in. Typically though the more caster you have, the more jacking you get (unless the scrub radius is zero, but it isn't).
On turn in the caster is a good thing, but if you have a large amount jacking you can get a significant weight shift, which tends to destabilize the car right after turn in. There are a ton of other effects too, it depends a lot on the rest of the suspension geometry. So the amount of jacking you get depends on how your car is set up, and how much it effects handling depends on what you're doing with the car.
Like anything in suspension, there are trade-offs, and getting the car to handle right for what you're doing with it is a balancing act. Some jacking is good, it tends to counter the overall weight shift to the outside and keep weight on the inside front tire. Too much is bad, you end up moving too much weight around as you enter the corner and you can get an opposing weight shift right after turn in, which is bad.
