The engineers also set to work on the chassis. Porsche had experience by this stage of racing with wider rear wheels, so the development engineers tried this out on the 911 Carrera RS 2.7 as well. “We wanted to improve traction and handling with wide tyres on the rear axle because the greatest weight is found on the rear axle,” recalls Falk. For the first time at Porsche, a series production car featured different tyre sizes on the front and rear axles. Fuchs forged 6 J×15 wheels with 185/70 VR-15 tyres could be found at the front, 7 J×15 with 215/60 VR-15 tyres at the rear. To make them fit, Porsche widened the body by 42 mm at the rear, around the wheel arches. “When this worked well in development, production and sales, all subsequent models were fitted with this combination,” Falk continues. All models got a more firmly tuned, lighter suspension system from Bilstein, plus thicker anti-roll bars. The front beams were made of lightweight aluminium. At the rear, reinforced rear control arms and cross-member reinforcement were used.
The engineers also set to work on the chassis. Porsche had experience by this stage of racing with wider rear wheels, so the development engineers tried this out on the 911 Carrera RS 2.7 as well. “We wanted to improve traction and handling with wide tyres on the rear axle because the greatest weight is found on the rear axle,” recalls Falk. For the first time at Porsche, a series production car featured different tyre sizes on the front and rear axles. Fuchs forged 6 J×15 wheels with 185/70 VR-15 tyres could be found at the front, 7 J×15 with 215/60 VR-15 tyres at the rear. To make them fit, Porsche widened the body by 42 mm at the rear, around the wheel arches. “When this worked well in development, production and sales, all subsequent models were fitted with this combination,” Falk continues. All models got a more firmly tuned, lighter suspension system from Bilstein, plus thicker anti-roll bars. The front beams were made of lightweight aluminium. At the rear, reinforced rear control arms and cross-member reinforcement were used.
