A new Ferrari will be revealed at the 2011 Bologna Motor Show: this is the 599XX with the Evolution package. The new package of performance-enhancing technical features will be available to clients for the 2012-2013 seasons. According to Ferrari, the new 599XX comes with improved chassis dynamics thanks to an active aerodynamic package integrated with the vehicles’ electronic control systems as well as a new set of Pirelli tires. Moreover, the car is more powerful, as the V12 engine delivers 750 hp and it also weighs 35 kg less.
As expected, the key to the aero package is the active rear wing design, which represents a new aerodynamic concept called ‘opening gap’. This wing features two flaps, with profiles similar to those used in Formula and can be rotated electronically in order to adjust the downforce between the front and rear axles in relation to vehicle speed and the manoeuvre being effected.
Ferrari says that this active rear wing is actuated automatically according to specific parameters, which are integrated with the car’s other control functions (ESP, ABS, SCM and F1-Trac).
The ‘opening gap’ system logic is based on the following parameters: steering wheel angle, longitudinal acceleration, lateral acceleration and vehicle speed. The new aerodynamic package also includes a modified front splitter and a new rear diffuser featuring a larger surface area and redesigned fences and foot-plates.
The total downforce at 200 km/h is boosted to 330 kg when the flaps are open and 440 kg in the closed configuration. As we said, the V12 engine delivers 750 hp, with 30 hp more than the previous version. The maximum torque has also been increased to 700 Nm.
For the 599XX, Ferrari made sure to conduct various test sessions in the wind tunnel in order to perfect its aerodynamics. It is no wonder then that at 200 km/h, its downforce is at 280 kg with 300 km/h having a downforce of 630 kg. On the front part and underside of its body, it has been entirely faired-in with vents that allow for hot air to move from its engine to the bonnet.
With this increase in performance, slick tires have been equipped with the front having the 29/67 R19 version and the rear bearing the 31/71 R19 ones. These were chosen as it allows for stability to be maximized especially when cornering and also aids when lateral acceleration is increased. The tires are fitted to the front with the 19x11J wheel rims and at the rear with the 19x12J wheel rims. One interesting feature in the 599XX is the use of what engineers refer to as doughnuts, which are based on F1 technology.
These allow both the wheel rim and the brake discs to be partly covered. These so-called doughnuts have two important functions which are to improve brake cooling and enhance aerodynamics. In working on the body, the engineers used the experience they have in using aluminum and mainly used carbon fiber and composites in order to attain the required weight.
It was not only the bodywork that benefitted in developing the high-performance materials as this was also the case for the braking system which now used carbon-ceramic materials. The brake pads for example, being composed of carbon fiber meant that while the calipers can now be smaller, the efficiency was guaranteed to be the same.
This also meant that the braking system would be able to achieve shorter braking distances and with the weight being reduced, makes it even more efficient. Going back to the downforce, this can be increased using the "ActiflowT" system which can also lower the drag, dependent of course on the trim cornering conditions of the car. This is all thanks to a porous material in its diffuser with the boot having a pair of fans.
These fans direct the flow of air that is under the vehicle and guides it to the two grilles that are just beside its tail lights. Helping increase the downforce even more is the addition in the rear buttresses of winglets. Still on the rear, integrated to it are synthetic jets which smoothen and control the air flow as well as lower the drag.