Does the Z have a rear toe-steer problem?

Guard Dad

A little context please: I've done a lot of reading on suspension design over the years and I know that bump steer is generally to be avoided. Since bump steer characteristics, on a production car, are rarely adjustable I have no practical experience altering them, so please help me out, is a 1/16" toe change (most of it on bump) considered to be a lot/excessive for a car such as the Z?

When contemplating the Megan Torque Arm as a possible solution:

1. Changing the inner pivot point (dropping it or moving it in a bit, probably not practical) could alter the bump steer profile.

2. Changing it's length (most likely longer) would reduce the angularity of the torque arm over it's length of travel which should "soften" or reduce the total amount of toe change. This assumes that there is enough adjustability in the torque arm to make a meaningful increase in length and enough adjustability in the rear suspension to bring the static toe and camber adjustments back into spec.

Comments?

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2010 Brilliant Silver, Base w/Sport Package, AT7, Katzkin leather, upgraded audio and lots of Dynamat and a bunch of small stuff.