Seger & Hoffmann kept the intellectual property of the cars and, together with Brun, upgraded the design and built a new C83 version with a 2.7-litre turbo Porsche engine. Brun entered the polyglot threesome for Le Mans but he wrote off the BMW-powered Sehcar in a big accident that broke his arm at the Nürburgring round.
Seger & Hoffmann maintained possession of the car's intellectual property and, along with Brun, improved the design before producing a new C83 model equipped with a 2.7-liter turbocharged Porsche engine. Brun joined the Le Mans competition as part of a three-person team but suffered a severe accident while driving the BMW-powered Sehcar at the Nürburgring circuit, resulting in a broken arm.