Sierra Uprights

Pin It

For the modified Ford Sierra set−up I used :

  • Modified Sierra uprights.
  • Mushroom top hat adapters.
  • McSorley 442 chassis with suspension mounts similar to Locost.
  • 195/45/15 − Diameter 556mm.
  • −1° camber.
  • Chassis to ground clearance 150mm.
  • Front track 1452mm.

image: Roll Centre Sierra Upright
» Download frontSuspensionSierra.dwg

Results

  • Roll Centre Height = 916mm
  • Swing Arm Radius = 1778mm
  • Top Arm delclination = 4.8° & Length = 310mm
  • Bottom Arm inclination = 2.0° & Length = 408mm
  • Top to Bottom Arm ratio = 0.754
  • Steering Axis Inclination = 10.92° + 1° camber (total 11.92°)
  • Scrub radius = 63mm

Conclusions

The swing arm radius, scrub and steering arm inclination are much closer to the desired goal.

Some goals such as 10° bottom arm inclination maybe hard to achieve on a road car due to ground clearance requirements, upright and tyre height.

This design is in the right direction. However a lot of trigonometry will be needed to accurately calculate parameters such as performance in bounce.

Updated Sierra »

Pin It

Web Design by Go Web Solutions