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2003 Ferrari 360 Challenge Stradale Pictures, Specifications, Information

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specifications information


General Information
Vehicle Type: 2-door coupe, production car
Price: $190,000
Miles Per Gallon: 10/16 mpg
Drivetrain
Configuration Mid Engine/RWD
Engine: V8
Displacement: 3586 cc
Horsepower: 425 bhp @ 8500 rpm
Torque: 276 lb-ft @ 4750 rpm
Max RPM: 8500 rpm
Transmission: 6-Speed F1
Dimensions
Weight: 2822 lbs
Height: --.- in
Length: ---.- in
Width: --.- in
Wheelbase: --.- in
Track: f: --.- / r: --.- in
Performance
0-60 mph: 4.0 sec
0-100 mph: 9.7 sec
Quarter Mile: 12.2 sec @ 117 mph
Top Speed: 186 mph
Lateral Acceleration: .95g
Braking, 60-0 mph: 107 ft
Slalom Speed: --.- mph
Nürburgring Lap Time: --.- minutes
For years, from the old 166 or 250 GT sport saloons to, somewhat later, with the GTO or F40, Ferraris have remained Spartan in terms of their trim, even though they had luxurious touches, to focuse entirely on performance in which every single gram of excess weight was eliminated. The other distinctive characteristic is the red body colour, an unmistakable sign of a Maranello car. But by the early ‘90s this way of conceiving cars seemed rather limited. Owning a Ferrari must give all-round pleasure and so any decision to limit comfort, usability and interior space excessively no longer made sense. The same went for colours. This change of thinking led to models like the 456 GT and 550 Maranello (and today‘s 575M Maranello), or the F355 and, later, 360 Modena eight-cylinder models.

Ten years on, this progressive mutation has now given way to a certain feeling of nostalgia for a Ferrari with no frills, which models like the F50 and Enzo have continued to express even though they were produced in limited runs. With the Challenge Stradale Ferrari again proposes the very essence of a racing car. Only features that were absolutely essential to the performance and safety were built into the car; the rest were left out. The end result is an extremely lightweight, fast sports saloon, with a true racing-style set-up and impeccable handling: a model offering top-level performance that incorporates experience gained over the many thousands of kilometres covered by drivers in Challenge Championships throughout the world and advanced testing with the 360 GTs that have participated in the FIA World Championship. There‘s a choice of two Challenge Stradale versions: a more extreme one with racing seats and sliding windows, last used on the F40, and another, fitted with lighter, wrap-around, leather seats and wind-down windows.

Aerodynamics

The Challenge Stradale builds on aerodynamic concepts employed on the 360 Modena by taking advantage of the racing set-up (stiffer and lower) and adopting specific solutions that have led to a gain of 50% in vertical load compared with the 360 Modena. The results are extremely significant: at 200 km/h the load increase is about 40 kg for a gain corresponding to the effect of a wing with 15 cm chord length and 1.8 m span.

Despite such a significant increase in vertical load, after all the modifications and adjustments to set-up the car has a Cd equal to that of the 360 Modena (Cd = 0.335).

Four types of intervention were adopted to improve aerodynamics on the Challenge Stradale.

- Front section: modification of the bumper, which now extends below the air intakes to increase load at the front but without disrupting airflow toward the rear.

- Aerodynamic study of the car‘s underside and rear section: with the result of an increase in height at the rear and introduction of longitudinal fins to balance the load. The decision was also taken to modify the rear nolder to achieve greater efficiency by adopting a shape more appropriate to the function.

- Drag and modification of the sills: the new shape streamlines the rear wheels more completely and contributes significantly to improving the car‘s efficiency and balance. The combined result of these interventions is that compared with the 360 Modena, drag has remained unchanged, so leading to a significant increase in efficiency.

In addition to the interventions outlined so far, the focus on the Challenge Stradale‘s aerodynamics and styling has been enhanced by a painstaking review of all technical details of the project: 360 GT-style aerodynamic, carbon mirrors, new 19" wheels with a Challenge-type design.

Weight Reduction

Careful project development has led to a Challenge Stradale car weight that is fully 110 kg less than the 360 Modena, achieved by concentrating on three complementary spheres: materials, construction technology and project optimisation. The basic material used to build the Challenge Stradale is aluminium, as was already the case for the 360 Modena and Spider. Aluminium has a specific weight one third of that of steel. This initial approach already made it extremely competitive (compared with the 360 Modena).

Starting from this base new developments were introduced specifically for the Challenge Stradale. Titanium, already used for the piston rods, was also adopted for parts of the suspension.

Carbon technology, derived directly from Formula 1 and used extensively on Ferrari limited-run road cars, was employed for the first time on an 8-cylinder car.

For the Challenge Stradale it has been used for both structural parts (door panels, racing seat shells, filter-box covers) and for interior and exterior trim features.

A particularly advanced construction technology was adopted for the car‘s floorpan. This involves impregnating the resin with multi-axial carbon fibres in a vacuum in order to obtain the necessary rigidity, but which simultaneously leads to a 50% reduction in the weight of the floorpan itself.

A key factor in the search for the best weight-performance ratio for the Challenge Stradale was adopting a braking system comprising carbon-ceramic (CCM) discs developed for Formula 1 (combined with aluminium brake carriers as standard equipment) that mean a 16% reduction in the weight compared with conventional brake discs; given that the weight eliminated affects unsuspended masses, its contribution to the car‘s performance can be assumed to be even more significant.

Reducing a car‘s weight also means a reduction in its inertia. The main effect of this on the Challenge Stradale, together with the peak power increase provided by the V8 engine, is a considerable increase in performance, particularly as regards pick-up and acceleration. The car accelerates from 0 to 100 km/h in 4.1 seconds and covers 400 metres from a standing start in 12.1 seconds.

The Challenge Stradale is equipped with the previous 360 Modena 90° V8 engine mounted centrally behind the cabin in a longitudinal configuration as a single block together with the gearbox and differential. Peak power output of the V8 engine has been raised to 425 bhp at 8,500 rpm to give an exceptional power rating that exceeds 118.5 bhp/litre, which makes it the most powerful aspirated V8 ever built by Ferrari also thanks to the ram-effect induction which, at maximum speed, increases power by 2%. The extremely high peak torque remains unchanged at 38 kgm at 4,750 rpm.

On the mechanical front, couplings for rotating parts in the Challenge Stradale‘s V8 have been carefully selected and this has led to a significant improvement in performance.

F1 Gearbox

The entire development of the Challenge Stradale was based around F1-type electro-hydraulic transmission that controls the clutch and gearbox by means of blades integral with the steering column - a trademark of Ferrari cars and a solution developed specifically for racing. The increase in precision guaranteed by the new control strategy applied specifically to this car, and also by a faster processing speed, has reduced gear-change time throughout the entire range of use, with a minimum of 150 milliseconds when using the super-performance option. The available gear-change configurations are consistent with the car‘s top-level sporting profile and so only include manual gear-change operated by the driver using F1-type paddles (there is no automatic gearbox option). The reverse gear is engaged by means of a button on the tunnel.

There are two gear-change configurations (Sport and Race): each of these configurations corresponds to an integrated car-control logic as regards damper set-up and traction control (ASR). In ‘RACE‘ mode and with the ASR disengaged there‘s also a ‘launch control‘ strategy as used in Formula 1, a feature specially designed to give drivers a high-performance start in good grip conditions.

Chassis

The Challenge Stradale has been derived from the 360 Modena and maintains the same basic approach and architecture. However significant changes have been made to the suspension system and set-up. The titanium front and rear springs are stiffer than on the 360 Modena (around +20%), whereas the rear bar has a larger diameter. These interventions have increased resistance to roll and dip and in general terms have made reaction to direction changes more rapid, giving the driver a more direct feel of the car.

Damper settings have been reviewed and defined specifically for this model. The car‘s centre of gravity has been lowered by 15 mm. The tyres are Pirelli P Zero Corsa type - this new Pirelli super-low tyre adopted specifically for the Challenge Stradale measures 225/35 at the front and 285/35 at the rear and is fitted on 19" Challenge-style wheels secured by titanium bolts. The choice of these tyres exclusively for the Challenge Stradale confirms the effectiveness of cooperation between two of motoring‘s historic brands, not only in the case of the Ferrari Challenge-Pirelli Trophy but also in the FIA GT Championship. A long series of tests carried out together with Pirelli has identified a tyre compound and tread design that maximises torque transfer to the road surface and produces very high lateral acceleration (1.3 g) while maintaining superb balance between the two axles. The innovative characteristics of this tyre, which made its world debut at the Geneva Show together with the Challenge Stradale, means grip can be adjusted to suit the thermal conditions under which the tyre must perform.

Braking System

The braking system on the Challenge Stradale comprises carbon-ceramic (CCM, Carbon Composite Material) discs: the result of highly advanced studies conducted by Ferrari in conjunction with Brembo, the supplier of this system.

Dimensions of the brake discs are as follows: front: 380 mm diameter x 34 mm thickness, and a differentiated-diameter, 6-piston calliper; rear: 350 mm diameter x 34 m thickness; and a differentiated-diameter, 4-piston calliper The carbon-ceramic system installed on the Challenge Stradale, together with the aluminium brake carriers, makes for astounding performance and braking distance. In terms of weight, the reduction achieved for the Challenge Stradale is 16% when compared with conventional brake discs. Overall deceleration rates for the Challenge Stradale are 15% better than for the 360 Modena.

Racing Interior

Essentiality - in the most specific meaning of the term - is the dominant characteristic of the Challenge Stradale‘s interior, right from the elimination of unnecessary features like carpeting and mats, to a racing-style interpretation for every single feature. The rev counter located right in the centre of the instruments becomes the driver‘s main point of reference, emphasised by the yellow graphics and red indicator that ensure optimum contrast and legibility. The entire panel is enclosed within a carbon-fibre element that also houses secondary instruments and other telltales. The new steering wheel, with a squashed crown in the upper section fitted with a sight just like on the racing version, has F1 gear-change paddles, the right one having been lengthened to facilitate changing up when pulling out of corners. The car is fitted with carbon fibre-structure racing seats upholstered with a high-grip textile.

Door panels are made entirely of carbon fibre, as is the central tunnel, which has been designed to house all the car‘s main controls - ignition button, reverse gear button, dynamic vehicle settings (race, launch control, ASR excluder) within easy reach of the driver. The car can be fitted with either 3-point attachment or 4-point racing attachment seat belts and an aluminium roll-bar that‘s 40% lighter than a conventional type, developed specifically for the Challenge Stradale.

photos
Image Credits: Ferrari
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