Once the vehicles were fitted with prototype suspension parts, they were again run on the four-post suspension-testing rig. Unlike base line testing, the purpose of this exercise was to optimize spring rates and shock absorber damping.

For the four post tests, we had multiple sets of springs (or torsion bars for the Level I Suspension) and a set of custom made, rebuildable shock absorbers to precisely adjust compression and rebound characteristics of the damper.

A test run is then made and evaluated as to whether more or less spring was needed in the front and rear, and then a stiffer or softer component is installed for the next run. Similarly, shock absorber damping is evaluated on each run and then the dampers are removed, revalved and run on a computerized shock dyno to adjust compression and rebound characteristics, before being reinstalled on the vehicle.

This process is repeated until data derived from the computer model is optimized with regard to overall vehicle dynamics and the desired balance between performance and comfort are achieved.

This exercise is performed for both the Level I and Level II Suspensions on each of our B and E body engineering cars with both the late model Hemi installed and also with ballast to simulate other engines packages.