Ferrari reveals extremely limited FXX K Evo at Mugello Circuit

Article by Christian A., on October 30, 2017

This weekend at the Finali Mondiali event at the Mugello Circuit in Italy, Ferrari finally took the covers off the FXX K Evo, after making an announcement earlier this week. Similar with the FXX Evo and the 599 XX Evo, the Maranello-based machine will be compatible with the 40 cars of the standard FXX K that currently exist. But this will not just be available as a package, but will also be offered as an “extremely limited-run model”. Even after the reveal, the automaker does not say how many examples will be made.

The track-only FXX K Evo’s main features are the upgraded aerodynamic body and the fact that this helps with the car’s weight loss. The package includes a fixed twin-profile rear wing complemented by two side fins and a central fin. Everything that has been done on the outside to boost aero was made possible by computational fluid dynamics (CFD) simulations that took place for over a year. This was done to help the FXX K Evo produce more downforce like that of cars that race in GT3 and GTE championships.

To be more specific, the FXX K Evo now has 23 percent more downforce compared to the standard model. That is equivalent to 75 percent more than the road-going LaFerrari, which it is based on. It generates as much as 640 kilograms of downforce when running at 124 miles per hour (200 kilometers per hour), and as much as 830 kilos of downforce at maximum speed.

All these performance upgrades did not just come from the new aerodynamics. The FXX K Evo’s body is actually much sleeker after the front and the rear bumpers had been resculpted, while the suspension had been tailored to the more aerodynamically efficient body. With all the new changes, the Evo now weighs less than the standard model, where the latter weighs 1,165 kilos (2,568 pounds).

An F1-derived built in gear shit paddle that is paired with a new steering wheel is now found in the Evo’s cabin. This features controls for using the kinetic energy recovery system (KERS). There is also a 6.5 inch display that replaces the original screen that acts as a monitor for the rear camera. Instead, the new display features a telemetry system that includes KERS status.

After about 5,000 kilometers of development runs, and 15,000 kilometers of tests, the FXX K Evo is what Ferrari has come up with. Under the hood is a 860 horsepower V12 engine with 750 Newton metres of torque. The engine works with an electric motor that produces another 190 horsepower. Therefore, it produces a total of 1,050 horsepower and 900 Nm of torque.

Future owners of the FXX K Evo will have the privilege to drive the car during the 2018/19 season that will be held on nine tracks.

Press Release

FERRARI FXX-K EVO: AN INNOVATIVE NEW PACKAGE FOR THE LABORATORY CAR

The Finali Mondiali provided the backdrop to the world premiere of the new FXX-K Evo which will be available both as an extremely limited-run model and as an upgrade package for the existing XX cars.

This latest arrival marks a significant evolution of the XX programme launched in 2005 with cars developed specifically to play an active role in the eponymous research and development programme which itself has become a byword for innovation and uncompromising performance.

As was the case with the Evo versions of the FXX and the 599 XX, the Ferrari FXX-K Evo benefits from an extensive package that applies innovative concepts derived from all of the various track categories in which Ferrari competes with its cars: the Formula 1, GT3, GTE and Challenge, the latter being the single-make championship bearing its name.

Derived from the racing world and adopting track-specific content, the FXX-K Evo, like all the previous XX cars, is not homologated for road use and will not be used in competition outside its dedicated programme.

Mirroring the vocation of its predecessor, it, however, is aimed at a small, highly-select group of Ferrari Clients: supercar enthusiasts eager to share the development of technologically-innovative content with the Prancing Horse technicians, through driving a closed-wheel laboratory car.

At the development stage, the designers worked on a broad range of different aspects of the FXX-K Evo, starting with reducing its overall weight. By drawing on Ferrari’s Formula 1 experience and adopting innovative carbon-fibre component crafting processes, they succeeded in producing a lighter car than the previous FXX-K despite introducing new elements such as the fixed rear wing.

The FXX-K Evo features an evolved aero package developed by Ferrari’s engineers in synergy with the Ferrari Style Centre’s designers, to push to the very limit the performance of a model that already represents the state-of-the-art in terms of Ferrari track-only supercars.

The product of over a year of CFD simulations and wind tunnel testing, the FXX-K Evo’s aerodynamics deliver downforce figures very close to those of the cars competing in the GT3 and GTE championships, all to the advantage of lateral acceleration in cornering, stability and, ultimately, exhilarating driving pleasure.

The FXX-K Evo’s downforce coefficient has been improved by 23% on the previous version, which is the equivalent of a 75% increase on the road car from which it is derived. Downforce of 640 kg is generated at 200 km/h, and exceeds 830 kg at the car’s red-line speed.

The FXX-K Evo’s downforce level is boosted by a twin-profile fixed wing on the tail. This new addition was developed to work in seamless synergy with the active rear spoiler. In fact, the pressure fields developed by the two downforce-generating systems support and amplify each other. To guarantee both excellent downforce and drag results, the mobile spoiler’s control logics and range of movement were also meticulously reviewed and reprogrammed.

The twin-profile rear wing is supported by two side fins as well as by a central fin. The latter plays a dual role: firstly it acts as a vertical fin, boosting stability at low yaw angles, and secondly, it supports the action of the three delta (triangular) vortex generators.

The vortex generators, on the one hand, clean the flow field striking the wing of the effects of the wake of the hot air flow from the radiators which vents onto the bonnet. On the other, they create a downwash component in the flow which boosts the twin-profile’s downforce capacity. The result is a 10% increase in the downforce developed by the rear system.

The design of the rear bumpers was also modified in the light of the new flow structures. The by-pass vent from the rear wheel arch has been enlarged, hollowing out the volume behind the wheels to ensure the wake from the wheels is efficiently channelled. The result is that the flow to the rear diffuser is protected and losses are reduced so that downforce has been boosted by 5%.

The significant increase in rear downforce demanded in-depth review of the design of the front bumpers and underbody to guarantee a balanced development of the downforce.

The geometry of the sides of the front bumper was altered by hollowing out the surfaces beneath the headlights. This made space for a couple of flicks divided by a vertical turning vane and an additional intake ahead of the front wheels. This system guarantees efficient downforce generation (10% of the increase in downforce gained on the FXX-K). It also makes good use of know-how acquired in the GT programmes in which rules introduced in 2016 permitted extensive study of the interaction between horizontal (flicks) and vertical (dive plane) flow management systems, optimising their efficiency.

Ground effect was also boosted by the introduction of vortex generators on the undertray. This capitalised on the accelerations created by the rear system and the front underbody, generating 30% of the extra downforce the car delivers compared to the FXX-K.

The FXX-K Evo’s boosted performance also demanded new front brake air intakes which, although no wider to avoid increasing drag, are more efficient thanks to a complete redesign of the intake itself.

Furthermore, the suspension was specifically calibrated to adapt it to the car’s new aerodynamic efficiency figures.

The clearly racing-inspired cabin is characterised by a conceptually-different steering wheel brilliantly suited to hugely powerful performance levels achievable in the FXX-K Evo. Formula 1 derived with integrated gear-shifting paddles, the new steering wheel now also sports the KERS Manettino to improve both control of that system and overall ergonomics.

The rear video camera screen to the right of the driver has been replaced with a larger 6.5” version.

It also now displays data from a new telemetry system with clearer, more direct performance parameter and car status readouts. The driver can check the KERS status and the times being clocked by selecting from the various screen options available.

After undergoing around 5,000 km of development runs and 15,000 km of reliability test-drives, the FXX-K EVO will be a very active protagonist in the XX Programme in the 2018/2019 season which spans nine track outings in all between the start of March and the end of October. As is now traditional, the XX cars will also be taking part in the prestigious Finali Mondiali weekend which marks the end of each racing season.

TECHNICAL SPECIFICATIONS

HY-KERS System

Max. power output

1050 cv

Max. torque

>900 Nm

Power output - ICE*

860 cv @9200 rpm

Max. rpms

9400 rpm

Max. torque - ICE

750 Nm @6500 rpm

Power output - electric

motor

140 Kw (190 cv)

ICE

Type

V12, 65°

Bore and stroke

94 x 75.2 mm

Overall displacement

6262 cm3

Compression ratio

13.5:1

Specific power output

137 cv/l

Dimensions and weight

Height

1116 mm

Wheelbase

2665 mm

Weight distribution

41% front, 59% rear

Gearbox

F1 dual-clutch transmission

7-speed

Suspensions

Front

Double wishbone

Rear

Multilink

Tyres

(Pirelli P Zero slicks with sensors)

Front

285/650 - R19 x10½

Rear

345/725 - R20x13

Carbon ceramic brakes (Brembo)

Front

398 x 223 x 36 mm

Rear

380 x 253 x 34 mm

Electronic control systems

ESC

Stability control

High performance ABS/EBD

High performance anti-lock brakes /electronic brake distribution

EF1-Trac

F1 Traction Control integrated with hybrid system

E-Diff 3

Third gen. electronic differential

SCM-E Frs

magnetorheological damping system with twin solenoids (Al-Ni tube)

Aerodynamics
*with dynamic ram effect, both electric and ICE

Active

Source: Ferrari

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Topics: ferrari, race car

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