The 3,000-PSI Corvette: Inside GM’s Secret Active Suspension Program

A regular C4 Corvette charging across a rutted proving ground at speed should have been pitching and heaving over every bump. This one wasn’t. The chassis stayed flat, almost unnaturally so, while the wheels hammered up and down underneath it like the legs of some mechanical insect. That car was real, and for a few years in the late 1980s it was one of the best-kept secrets in Detroit. General Motors had just bought Lotus, active suspension was the hottest idea in Formula 1, and somebody high up decided the Corvette deserved a dose of it. What followed was one of the most ambitious things Chevrolet ever attempted, and one it would later do its best to forget.

When GM Bought a Formula 1 Secret

GM closed its deal for Group Lotus in 1986, and the British firm arrived carrying something the Americans wanted badly. Active suspension. The idea traced back to Colin Chapman, Lotus’s restless founder, who set his engineers chasing it in the early 1980s to wring more out of ground-effect aerodynamics. Chapman died in late 1982, before the system ever scored a win, but the work outlived him. Nigel Mansell ran early versions in 1983. By 1987 it had matured into something genuinely quick.