Bugatti Chiron Super Sport 300+ And Pur Sport Take On Nardo Together
The circular track, 12.6 kilometers long and 4 kilometers in diameter. The outer edge tilts toward the center more than 12 degrees – ideal for top speeds. The Nardò test site in Puglia, Italy is considered the fastest racing circuit in the world, making it the perfect test site for the hyper sports cars Bugatti Chiron Pur Sport1 and Chiron Super Sport 300 + *. The circuit theoretically allows speeds of over 400 km / h and test pilots do not need to steer up to 240 km / h. Due to its low parabolic profile, centrifugal force is compensated and drivers have the sensation of driving in a straight line.
The inner field of the high-speed circular track accommodates a 6.2-kilometer handling course – designed to accommodate vehicle dynamics and suspension. 70 kilometers of tracks are available for in-depth testing over an area of over 700 hectares. For the first time, the two extremes of Bugatti’s performance spectrum meet on a test track.
“The Nardò test track with the circular high-speed track and the handling track is ideal for us. Here we can significantly improve the Chiron Pur Sport and the Chiron Super Sport 300+ at different speeds and high temperatures, ”says Stefan Ellrott, Development Manager at Bugatti. “Our hyper-sporty cars not only need to perform well at moderate speeds and temperatures, but also at speeds over 300 km / h, as well as in cold and hot conditions.”
More than 20,000 test kilometers
Bugatti goes to great lengths to achieve this: 37 employees from several departments develop eight Bugatti vehicles in Italy over a period of four weeks, from sunrise to sunset. In total, four Chiron Super Sport 300+ and four Chiron Pur Sport pre-production runs a total of more than 20,000 kilometers. Engineers record the data with their computers on each turn, sometimes only changing minor details to verify the result on the next turn. Nine gigabytes of data were generated for tuning the engine control unit alone, which was then evaluated after testing. It is a job that requires a high level of concentration on the part of all staff. “The schedule is tight, which is why we use every minute to be able to carry out our driving tests around the track,” explains Christian Mohr, Bugatti engine test engineer.
In addition to Pure Sport, the development phase of the Chiron Super Sport 300+, the new longitudinal dynamic force of the Chiron2 family, is also in full swing. Derived from the record-breaking vehicle, which was the first production car to reach speeds of over 300 miles per hour, at 304.773 mph (490.484 km / h), in the summer of 2019, engineers are developing a very fast special edition limited to only 30 vehicles. Bugatti only electronically limits its top speed to 440 km / h.
Visually speaking, the fastest production Bugatti ever built differs from the Chiron and Chiron Pur Sport with such things as an elongated and aerodynamically optimized body designed for high speed driving. The elongated rear, known as the longtail, allows laminar flow to pass over the vehicle longer and thus significantly reduces aerodynamic stall. Air curtains on the side next to the air intakes direct air from the front to the rear to force it along the side of the vehicle. Nine outlet air slots on each fender prevent air pressure from building up in the wheel arches due to the wheels turning. Thanks to the modified bodywork, the vehicle reacts differently at high speeds compared to previous Chiron models.