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Here’s the technology that got the Bugatti Chiron Super Sport 300+ to over 300 mph

Bugatti stunned the automotive world in 2019 with the announcement that it had broken the 300 miles per hour for production cars with a special version of the Chiron called the Chiron Super Sport 300+. The automaker has since provided more details about the technology that allowed this super Chiron to accomplish this feat.

Changes to the standard Chiron start with the aerodynamics. Starting at the front, Bugatti optimized the air intakes to allow 8% more airflow into the front radiator and added “Air Curtain” elements to better direct the airflow around the sides of the car. The tops of the front fenders also have nine circular vents, a design feature that hints at the 1990s Bugatti EB110.

Moved backwards, the Super Sport 300+ has a long tail – 9.8 inches longer than the standard Chiron – for more stability at high speeds. The extra length also allowed Bugatti to enlarge the rear diffuser, as did the vertical tailpipes on the Super Sport 300+ model. Taken together, these changes add 32% to the size of the diffuser over the standard Chiron item, Bugatti said.

Bugatti Chiron Supersport 300+

On top of this extended rear is a larger rear wing, which, according to Bugatti, has around 8% more surface area than the standard wing when it is fully extended when the car is in driving mode. As with other versions of the Chiron, the wing retracts in high speed mode to minimize drag.

Bugatti also increased the output of the 8.0-liter quad-turbo W-16 to 1,577 hp, 97 hp more than the standard Chiron and corresponds to the Centodieci special edition. The peak output is now 7,100 rpm – 300 rpm higher than the standard Chiron.

Engine modifications include reinforced pistons, a high pressure oil pump, and redesigned turbos. According to Bugatti, the turbos suck in 4.8 tons of air per hour under full load.

Bugatti Chiron Supersport 300+

Bugatti Chiron Supersport 300+

The Chiron’s 7-speed dual clutch transmission received new gear ratios to accommodate its higher top speed, as well as a 0-124 mph acceleration time of 5.8 seconds and a 12.1 second sprint from 0-186 mph.

The Super Sport 300+ also received a newly tuned chassis with an increased rear axle spring rate for additional stability. It rolls on a model-specific version of the Michelin Pilot Sport Cup 2 performance tire with special lightweight aluminum wheels.

Bugatti announced a customer version of the Chiron Super Sport 300+, but only recently started deliveries. The first two of 30 planned cars reached customers at the end of September, and for all owners who want to set their own speed record, note that Bugatti is limiting the speed of these models for safety reasons.


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