This decades-old rally tech was so advanced McLaren still uses it today.
This story starts further back than the turn of the millennium, though. In the late Eighties, Australian Chris Heyring, then an art professor, came up with an idea for a new type of automotive suspension. His “Kinetic” suspension system seeks to overcome the limitations of traditional anti-roll bars. An anti-roll bar, obviously being a fixed piece of metal connecting opposite sides of the car, is of a fixed stiffness.
Essentially, the Kinetic suspension decouples vertical wheel motion from horizontal motion , while offering a ton of bandwidth when it comes to roll stiffness. Heyring developed the system for off-roaders, where to increase wheel articulation, you really want no anti-roll bar whatsoever. But on the road, going without an anti-roll bar is unpleasant at best, and dangerous at worst.
. The Xsara WRC incorporated a sort of split metal anti-roll bar supported by the hydraulic system. It offered Citroën’s rally drivers a car with great flexibility—on rough terrain, each wheel had the bandwidth to handle the many dips, crests, bumps, jumps, rocks, and everything else you see on a rally stage. On faster, smoother roads, you could effectively ramp up roll stiffness for more speed..
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