2011 Ferrari 458 Italia
The Ferrari 458 Italia, is an 8-cylinder two-seater berlinetta with a mid-rear mounted engine, and represents a genuine break with the past in terms
of Maranello's previous high-performance sports cars.
Designed to fulfil the expectations and ambitions of our most passionate clients, the 458 Italia continues the Ferrari tradition of putting the thrill into
driving as a result of track-derived technological innovations. Maranello's racing experience can be felt not only in terms of pure technological transfer
but also on a more emotional level, because of the strong emphasis on creating an almost symbiotic relationship between driver and car.
Styling and aerodynamics
Every Ferrari is the result of an uncompromising design approach that integrates styling and aerodynamic requirements. The Pininfarina design
features compact, aerodynamic lines, underscoring the concepts of performance-oriented efficiency that inspired the project.
Engine
The engine is a dry-sump 90 degree V8 with a displacement of 4499 cc and is mid-rear mounted. It is an entirely new design engineered to reach a
maximum of 9,000 rpm – a first on a road car – with a high 12.5:1 compression ratio and maximum power output of 570 CV. This equates to an
outstanding power output of 127 CV/litre, a new benchmark for a naturally-aspirated production engine.
The generous torque available - 540 Nm at 6000 rpm, with over 80 per cent available from 3250 rpm – ensures rapid pick-up from all revs. The specific torque output of 120 Nm/l is another record.
The design of the engine components has been influenced by the carry-over of racing technology – F1 in particular – for maximum fluid-dynamic
efficiency in order to achieve both performance and fuel consumption objectives, and meet the most stringent international emissions restrictions.
The piston compression height was reduced as per racing engine practice. Similarly, thinner compression rings have been adopted to minimise friction
between piston and liner. A graphite coating was applied to the piston skirt for the same reason.
To help further reduce internal friction, the cylinder block has four scavenge pumps. Two pick up oil from the cylinder heads and front and rear of the
engine via dedicated oil recovery ducts outside the crankcase area, and two pick up oil from below the crank throws. The recovery ducts of the
latter are interconnected in two groups of four cylinders to optimise the scavenge function and create a strong vacuum (800 mbar) around the
crankshaft. This solution prevents excess oil splashing out of the sump and onto the rotating crankshaft and thus reduces power loss caused by
friction. It also reduces losses due to windage caused by the pumping action of the pistons.
The engine oil pressure pump features variable displacement geometry which reduces the amount of power absorbed at high revs. Lowering the
pump's displacement actually increases the power available at the crankshaft for the same amount of fuel used.
As is traditional for Ferrari engines, the new V8 is equipped with continuously variable timing on both inlet and exhaust cams. The aluminium intake
manifold has been lightened by reducing the wall thickness. It has short, almost straight inlet tracts to reduce losses and a system that varies the
geometry of the manifold, optimising the volumetric efficiency throughout the rev range. This is achieved by incorporating three pneumatic throttle
valves in the central section between the two plenums. The engine mapping provides four different configurations of the valves for optimum torque values at all revs.
The use of GDI with Split Injection improves engine performance by modulating the injection in two phases, increasing combustion efficiency and the
torque at low revs (by up to 5 per cent). A high injection pressure (200 bar) guarantees adequate pulverisation of the petrol and an optimal air/fuel
mix right up to 9000 rpm. This feature again results in better performance and lower fuel consumption. The exhaust system was designed to provide
the kind of thrilling soundtrack owners of Ferrari's V8s are used to whilst also guaranteeing high levels of acoustic comfort. One of the main
objectives with the exhaust was to reduce weight. The catalytic converter is attached to the central section of the exhaust by a flexible element to
reduce the amount of vibration transmitted and to thus allow thinner metal to be used. Similarly the pre-catalytic converter has been eliminated,
lowering overall weight and reducing back pressure whilst still respecting strict Euro 5 and LEV2 emissions.
Gearbox
One of the important novelties on the 458 Italia is the introduction of the 7-speed F1 dual-clutch gearbox which guarantees faster yet smoother
changes. The technology is based on the independent management of even and odd gears which are pre-selected using two separate input shafts.
The gear shifting time (the overlap between the opening and closing phases of the two clutches) is zero and thus there is no interruption of engine
torque to the driven wheels. Compared to the California gearbox, response times have been reduced and the 458 Italia has specific, sportier gear
ratios to match the power and torque curves of the new V8, guaranteeing high torque even at lower revs. The E-Diff 3 electronic differential has also
been integrated into the gearbox, resulting in a more compact and lighter unit.
Suspension and steering
The 458 Italia's front suspension employs a novel new double wishbone set-up which features an L-shape design for the lower wishbone, with the
rearward facing arm longer than the one in line with the wheel axis to provide greater longitudinal flexibility. This in turn improves the car's ability to absorb bumps and it also reduces suspension noise.
Another benefit is in terms of greater transverse rigidity which improves handling. The same characteristics are shared by the new rear multi-link
suspension and, combined with specific tyre development, overall vertical rigidity has thus been improved (+35 per cent with respect to the F430) for
less body roll, and the engineers were able to introduce a more direct steering ratio (11.9° compared to the F430's 16.9°, a reduction of 30 per cent) which makes for quicker and more responsive steering on both road and track.
The 458 Italia also features the latest, second-generation Magnetorheological Suspension Control shock absorber system. Compared to the system
first introduced on the 599 GTB Fiorano, SCM2 boasts an evolved ECU (-50 per cent input time) and a damper force generation time of 8 ms
compared to the 599's 15 ms. There is also a new piston rod bushing in the damper which reduces internal friction (-35 per cent) for more precise small-bump control and improved ride comfort.
High-performance ABS
Since the beginning of 2008 Brembo carbon-ceramic brakes have been standard on all Ferraris. The 458 Italia is no different and is equipped with
6-pot aluminium callipers with 398 x 223 x 36 mm discs at the front, and 4-pot aluminium callipers with 360 x 233 x 32 mm discs at the rear.
The 458 Italia boasts outstanding braking distances (100-0 km/h in 32.5 metres; 200- 0 km/h in 128 metres) thanks to the development and
optimisation of the Bosch control logic and the evolution of Ferrari's Pre-Fill logic, which reduces response times by activating the pistons in the
callipers, thus minimising the gap between the brake pad and the disc as soon as the driver lifts off the accelerator. Similarly, these excellent results
were achieved thanks to a specific calibration of the ABS for medium/high grip surfaces, and by integrating the ABS control logic with that of the
E-Diff 3 to ensure a more accurate estimate of the vehicle speed and hence better braking torque control, as well as enhanced vehicle stability.
Vehicle dynamics and electronics
On the 458 Italia the E-Diff and F1-Trac control software are integrated in the same ECU. This minimises communication times between the two
systems and, at the same time, the individual logics were evolved to improve vehicle performance.
A new Power On strategy has been developed for the E-DIff governing traction out of corners and is integrated with the F1-Trac logic, an evolution
in the combined action of both systems which is also connected with the high-performance ABS control logic, which is specially set up for high-grip surfaces.
The electronic differential continuously distributes torque to the rear wheels, both in Power Off (turning in for the corner) and Power On (accelerating
out of the corner), guaranteeing excellent vehicle stability and control in all driving conditions and on all surfaces. The E-Diff 3 now works in a more
integrated manner with the F1-Trac, using a series of F1-Trac parameters and evaluations (such as estimates of grip) both in manettino positions in
which the F1-Trac is inserted (Sport – Race) and those in which it is deactivated (CT Off and CST Off). Compared to previous versions, E-Diff 3
delivers improved torque distribution coming out of corners (in Sport, Race, CT Off and CST Off), which translates into improved grip, better
roadholding and more progressive handling on the limit. The result is an improvement of 32 percent in longitudinal acceleration out of corners compared to previous models and a lap time at Fiorano of just 1" 25 seconds.
Chassis
The modular chassis is an all-new design. New alloys join the traditional aluminium, along with high-resistance aluminium extrusions, developed by the
aviation industry, and innovative manufacturing processes, such as heat-forming. The aim was to keep weight down to the benefit of performance
and handling. The result is a chassis with improved structural rigidity, with torsional rigidity up 15 per cent compared to the F430, and beam stiffness up 5 per cent.
Aerodynamics
Every Ferrari is the result of an uncompromising design approach that integrates styling and aerodynamic requirements. The Pininfarina design
features compact, aerodynamic lines, underscoring the concepts of performance-oriented efficiency that inspired the project.
The nose features a single opening for the front grille and side air intakes, with aerodynamic sections and profiles designed to direct air to the coolant
radiators and the new flat underbody. The nose also sports small aeroelastic winglets which generate downforce and, as speed rises, deform to reduce the section of the radiator intake and cut drag.
The oil radiators for the F1 gearbox and the dual-clutch are situated in the tail and air is fed from two intakes on the top of the rear wings. This
solution provides a base bleed effect, an aerodynamic function that was developed by Ferrari for the FXX and which reduces drag by feeding the hot
air out of the radiators under the nolder and into the slip stream. Using experience gained in aerodynamic development on the Ferrari F430 GT2, the
flat underbody now incorporates the air intakes for engine bay cooling. These are positioned ahead of the rear wheelarches where they use pressure
differences to efficiently channel air flow to the engine bay, at the same time generating more rear downforce.
The car's sills are characterised by two keel forms that act as fairings to the rear wheels, while the rear bodywork between the rear diffusers acts as
the surround to the novel triple exhaust tail pipes, a styling cue that recalls the legendary F40 and gives the 458 Italia's tail an aggressive sporty
stance. The engine, in mid-rear V8 Ferrari tradition, is visible below the engine cover.
Technical development of the car's shaped started using CFD (Computational Fluid- Dynamic) techniques which helped optimise the management and
interaction of the internal flows prior to wind tunnel testing. The latter was carried out on Ferrari's rolling road facility using modular 1:3 scale models.
The final solution chosen ensured adequate cooling to the running gear, while, at the same time, achieving a high level of aerodynamic efficiency
(1.09) through excellent drag and downforce figures (Cd 0.33 and Cl 0.36 respectively) with 140 kg of downforce at 200 km/h and no less than 360 kg at top speed.
The front-mounted coolant radiators are trapezoidal in shape and positioned to minimise the impact of the internal cooling flows on drag and
downforce. The oil radiators for the gearbox and clutch are are situated in the tail with air fed from two intakes on the top of the rear wings. The hot
air from the radiators creates a base bleed effect, venting into the car's low-pressure trail below the nolder and reducing drag. The air intakes for
engine bay cooling are situated on the aerodynamic underbody, where differences in pressure channel the air in the most efficient manner, and are
positioned to increase rear downforce. Similarly air is channelled from the front air dam to the rear diffuser where the position and number of the
fences has been developed to optimise the distribution of the vortex to improve rear downforce.
458 Italia ~ Technical specifications
Dimensions and Weight
- Overall length....................4527 mm (178.2 in.)
- Overall width....................1937 mm (76.3 in.)
- Height....................1213 mm (47.8 in.)
- Wheelbase....................2650 mm (104.3 in.)
- Dry weight....................1380 kg (3042 lbs) With forged wheels and Racing seats
- Weight/power ratio....................2,42 kg/CV (7.16 lbs/kW)
- Weight distribution fr/r....................42%/58%
Engine, Gearbox & Electronics
- Type....................V8 – 90°
- Total displacement....................4499 cc (274.5 cu in.)
- Maximum power....................570 CV (425 kW) @ 9000 rpm [Including 5 CV of ram effect]
- Maximum torque....................540 Nm (398 lbs/ft) @ 6000 rpm
- Specific power output....................127 CV/l
- Compression ratio....................12.5:1
- Tyres....................[Front: 235/35 ZR20 8.5"][Rear: 295/35 ZR20 10.5"]
- Gearbox....................Dual-clutch, 7-speed F1
- Electronics....................E-Diff3, F1-Trac, high-performance ABS
Performance
- Maximum speed....................325 km/h (202 mph)
- 0-100 km/h....................3.4 s
Fuel Consumption + Emissions
- Fuel consumption....................13.3/100 km [Combined cycle (ECE+EUDC)]
- Emissions....................307 g CO2/km [Combined cycle (ECE+EUDC)]
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