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This has been discussed over and over again. You might search for VRK.
The ng900's, 9-3's and Viggens share the same suspension design.
The steering rack floats in thick rubber bushings which allow it to float around. The VRK replaces one of those with a solid aluminum clamp. It also has a brace to reduce the firewall from cooksheeting. The rack bolts to the firewall.
The two lower control arms are joined to produce a lower wishbone. The joining rubber hollow oil filled 'hydraulic' bushing is replaced with a urethane bushing which keeps things in a better relationship.
The control arm that connects aft near the firewall plane has a rubber buishing which is replaced with a steel sherical bushing.
There is also a subframe brace which keeps the distance across the lateral control arm bushings more congtrolled under heavy forces.
The VRK eliminates lots of rubbery bits which makes the steering quite uncontrollable at times. Is like fighting with a snake. With the VRK things are more controlled. There are still some strong forces at times, but if you hold the steering wheel firmly, things work out very well.
Cornering is greatly improved. Without the VRK it is like only the outer front wheel is trying to work a corner. With the VRK corning is very strong and able.
Yes it is expensive, but it works very well.
Choice ires and tire pressure can influence torque steer effects a lot to.
If you install the VRK, if your strut upper mounts are worn out, you will have a problem. The work is only slightly complentary. The only common labour item to removal of the strut(for the upper mount) and installing the VRK is removal of the ball joint from the strut assy.
With the VRK I and others suggest setting to a very low toe-in setting. Abbott suggests the opposite, but that does not bode well for real word stopping in cold rain or snow as the tires are too much in conflict with higher toe-in settings. This is especially true when you consider what happens to that toe-in angle when on the road. The angular deflection is taken up, reduced by the deflection of all of the rubbery bits in the stock trim. With the VRK, for a given toe-in, the VRK is going to make the toe-in forces more severe as things are less rubbery.
posted by 65.68.100...
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