Your mechanics are probably still thinking leaf springs, which have a considerable amount of hysteresis. It wasn't uncommon to find leaf springs without shocks in some applications.
Randy
You could look at SAE J695 "Turning Ability and Off Tracking - Motor Vehicles". The "sum of squares" method is most commonly used to predict off tracking of a given vehicle. The method is described in J695.
It is available through the SAE at www.sae.org
Sorry. I was still referring to commercial vehicles when I indicated that there was no current regulation of the CG height. There is considerable research into commercial vehicle rollover being conducted by many agencies, including NHTSA. For example, NHTSA currently has projects in roll...
There are a number of common tests for commercial vehicles, which are designed to help determine the rollover threshold. The SAE standard J2180 is a tilt table test for measuring the static rollover threshold. SAE J2179 is a test for evaluating the rearward amplification factor of an...