Thursday, November 18, 2010

Mastretta MXT

The Mastretta MXT is the first high-performance sports car by Mastretta Cars. The new automotive manufacturer division of Tecnoidea is based in Ocoyoacac, Estado de México, closely located to the capital of the country.

The Mastretta MXT is a high-performance 2 seat sports car, engineered to deliver outstanding performance through mechanical excellence.

The MXT is Mastretta’s answer to the lightweight sports car market, offering a highly advanced vehicle with aggressive design and outstanding driving dynamics while simultaneously responding to our environmentally conscious times by achieving a high level of fuel efficiency.

This lightweight coupé (weighing just over 900 kg) is an entirely new 2-seater, rear mid-engine sports car developed using advanced aerospace materials and motorsport technology. The MXT was developed with the driver experience in mind. Its priorities from the onset have thus been to deliver outstanding performance through purity of design. Its powerful turbocharged 2.0 L engine develops 250 hp, allowing the MXT to accelerate from 0 to 100 km/h (62 mph) in just 4.9 seconds. This acceleration is harnessed by a finely tuned chassis, allowing the vehicle to develop more than 1.1 G of cornering and braking force.

The Mastretta MXT has the robustness and practicality that allow for its use on a day-to-day basis. It is well suited for long distance journeys and city driving alike. With class-leading interior space, this coupé conveys a feeling of spaciousness.  The vehicle is fitted with beautifully crafted carbon fiber seats, wrapped in premium leather while interior accents are trimmed in Ultrasuede®, creating the perfect balance between elegance and performance. This car is equipped with the latest technological amenities, including a multimedia system featuring GPS, Bluetooth and iPod compatibility. While performance-oriented, the ride enjoys a high level of comfort due to a lightweight vehicle construction. The MXT is a unique car that offers a high level of versatility, making it a perfect vehicle for daily spirited driving or as a powerful racetrack element.

ENGINE

The turbocharged 2.0 litre Duratec four cylinder engine is located behind the cockpit and in front of the rear axle, connected to a MTX-75 five-speed manual gearbox.

With a power output of 184 kW (250 hp) and 340 Nm (251 lb-ft) of torque, this aluminium power plant is excellently suited to the MXT as it is compact and lightweight, while delivering very good levels of  performance and drivability.

A bespoke engine management system was developed for performance driving: it has immediate throttle response and a consistent torque output throughout the rev range, while the turbo lag is unnoticeable. The shift lights at the top of the digital instrument cluster indicate the exact time for gear changes, allowing the driver to make the most of the Mastretta MXT’s engine performance.

CHASSIS

Built from specially designed aluminium extrusions and carbon fibre, the bespoke chassis of the MXT was engineered to provide high rigidity and low weight. The suspension of the Mastretta MXT perfectly complements the potential of the lightweight semi-monocoque and powerful engine, which results in outstanding levels of lateral grip and traction.

The semi-monocoque constitutes the basis to achieve the class-leading dynamics and performance of the car.

Aluminium extrusions and sheets are bonded together with aerospace industry-derived cold-cure adhesive to form the main cockpit tub. The carbon fiber floor beneath the entire cockpit area increases the car’s stiffness, while the lightweight steel rear subframe gives unity to the chassis and provides a strong backbone for the engine and rear suspension assembly. The aluminium fuel tank is placed within the monocoque, between the passenger cell and engine compartment.

The MXT features a fully independent double wishbone suspension front and rear, with a front anti-roll bar that further stabilizes the car in high speed corners. The shock absorbers and coil springs are finely tuned for grip. This setup provides optimum agility, stability and steering precision, while still delivering a high level of ride comfort.

The braking system consists of four piston callipers with cross-drilled rotors measuring 300 mm at all four corners. The synergy between the vehicle’s low mass, ideal weight distribution and powerful brakes allow the MXT to brake from 100 km/h to a halt in only 35 meters.

PERFORMANCE: PURPOSE

The Mastretta MXT is about performance. Advanced engineering, lightweight materials and a powerful engine act together to achieve the dynamics of the MXT. Steeped in the principles of modern racing technology, the MXT does not include driver aids or electronic assists that filter the driving experience. It is driving at its purest essence.

As a driver’s car, the most important development aim was to focus on optimizing acceleration, cornering and braking capabilities. With an overall weight of just over 900 kg and a turbocharged Duratec 2.0 litre engine producing 250 hp, the MXT accelerates from 0-100km/h in 4.9 seconds, and reaches a top speed of 230 km/h. The high-performance chassis can generate lateral acceleration of up to 1.1 G, making exceptional cornering speeds possible, while the fadeless braking system provides outstanding stopping power.

But despite its remarkable performance, the MXT is not intended to be a hardcore track day special that maximizes speed but offers no practicality. Thus, the car is very well suited for long-distance road driving, oriented towards spirited drivers who seek an exhilarating drive. Benefiting from its light weight, low centre of gravity and relatively long wheelbase, the chassis offers a fine balance between ride and handling. Despite its agility and power, it is easy to control even at the limit of grip.

MANUFACTURING

The Mastretta MXT is a powerful machine designed to deliver outstanding performance through mechanical excellence. This requires the use of bespoke materials and components, and a construction process that blends advanced technology with careful craftsmanship.

From the construction of the aluminium chassis to the delicate finish of the composite body, Mastretta employs high quality manufacturing techniques that transformed concept into reality.

With a complete design and engineering package that is entirely new and developed in house, the MXT has about 1,800 separate purpose-built parts that fit together with utmost precision. The chassis is made from laser-cut aluminium sheets and extrusions that are bonded together with aerospace adhesive, complemented with a structural carbon-fibre floor and chromoly roll cage. As a result, the chassis is outstandingly light and rigid while providing maximum safety in the cockpit.

As the chassis is being manufactured, other departments fabricate all mechanical components and sub-assemblies, such as the hand-built suspension, engine structure, fuel tank and body panels. All parts undertake quality control testing before arriving in the assembly area, where the car is finally put together. Employing clever solutions that remain true to the purity of design, the MXT is built with only high quality components from specialized manufacturers.

TYPE
Two-door, two-seat, mid engine coupe.

DIMENSIONS AND WEIGHT
Length / Width / Height: 3,900 / 1,750 / 1,170 mm
Wheelbase: 2,415 mm
Track front / rear: 1,415 / 1,450 mm
Ground clearance: 150 mm
Fuel capacity: 40 L
Empty weight: 880 kg
Curb weight: 930 kg
Maximum load: 180 kg
Maximum weight: 1,200 kg
Weight distribution: 44 / 56 %
Trunk volume: 82 L

CHASSIS
Construction: Semi-monocoque made with 6000 series aluminium extrusions and sheets, with structural carbon fiber floor, bonded with aerospace adhesive and rivets. Steel subassembly for the engine, chromoly roll cage and aluminium flat floor.
Steering: rack & pinion
Steering ratio / Turns lock-to-lock: 15:1 / 2.8
Turning circle: 12 m

SUSPENSION
Suspension front: double wishbones, anti-roll bar
Suspension rear: double wishbones
Elastic element: coil springs
Shock absorbers: monotube, pressurized gas

BRAKES
Brakes: ventilated and perforated discs, 300 x 22 mm front and rear
Brake calipers: machined aluminium, 4 pistons front and rear

ENGINE
Location / alignment: mid transverse
Cylinders: 4 In-line
Block / head: aluminium / aluminium
Type: DOHC, 16 valves
Fuel system: EFI with turbo compressor and  intercooler
Displacement: 1,998 cc
Bore x stroke: 87.5 x 83.1 mm
Compression: 10.8:1
Maximum power: 186 kW / 250 hp @ 5,200 rpm
Maximum torque: 339 Nm / 250 lb-ft @ 3,950 rpm

TRANSMISSION
Type: 5 speed manual
Traction: RWD
Clutch: Single disc, dry
Final drive ratio: 4.067:1

PERFORMANCE
Power to weight ratio: 3.72 kg/hp
Specific output: 125 hp/litre
Maximum lateral acceleration: 1.1 G
Maximum speed: 240 km/h

TIRES AND WHEELS
Wheels: One-piece cast wheel, 17 x 7.5 front and rear
Front tires: 205/45 ZR17 88W
Rear tires: 235/45 ZR17 88W

EMISSIONS AND FUEL CONSUMPTION
Urban cycle: 12 km/l
Extra-urban cycle: 18 km/l
Combined cycle: 15 km/l
CO2 Emissions: 195 g/km
Emissions compliance: EU5

SAFETY
Certification: VCA, low volume type approval /ECC
Equipment: Frontal aluminium and steel crashbox, three point seat belts, side protection bars, chromoly roll cage.



Mastretta MXT
Mastretta MXT backsideMastretta MXT front
Mastretta MXT sideMastretta MXT backside

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