It's all about speed. :)
After Porsche won Le Mans for the third time with the 919 Hybrid—bumping to 18 its total overall wins at the French race—the car maker decided to end the 919 Hybrid racing program. But instead of just sticking the race cars in the museum, Porsche decided to see how fast they could really go. New engine management software and no need to abide by a fuel-flow restriction bumped the 919's turbocharged V4 engine output from 500hp (373kW) to 720hp (537kW). The hybrid system is 10-percent stronger at 440hp (328kW).
Active aerodynamics at the front and rear have increased downforce in the corners and decreased drag on the straights. The suspension has been beefed up to cope with higher loads, and the traction control and brake-by-wire systems have been enhanced. About 86lbs (39kg) of weight was removed, and Michelin even made a bespoke tire for the car. Obviously there had to be a point to all of this, and there is: a farewell tour for the car, now named the 919 Evo, with the goal of setting some new lap records.
Mark & Don would appreciate this without question.
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