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  Mitsubishi Lancer WRC04

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Country of origin:Japan
Introduced in:2004
Source:Company press release
Last updated:Before December 1st, 2004
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Click here to download printer friendly versionMitsubishi Motors motor sports subsidiary, MMSP, unveiled the car that will spearhead its 2004 FIA World Rally Championship campaign, the Mitsubishi Lancer WRC04. A completely fresh design, the new car forms an integral part of a meticulously conceived long-term plan to build on MMSP's distinguished record in the World Rally Championship. It will compete on all 16 rounds of the series.

World Rally Car rules demand that the competition car is derived from a family of showroom cars, made in quantities of at least 25,000 per year. The Lancer WRC04 is therefore based on the standard Lancer, but as its dramatic appearance indicates, it has little in common with previous Mitsubishi World Rally Cars. Once again, it draws on Mitsubishi Motors' worldwide resources, combining Japanese and European capabilities, but it reflects a fresh design strategy and has been created by a new, youthful engineering team.

The Lancer WRC04's appearance reflects the increasing importance of aerodynamics in World Championship rallying. MMSP spent almost three weeks testing in the Lola racing team's wind tunnel, re-designing the bonnet, along with the front and rear wings, as well as the rear aerofoil. The first priority was to gain more downforce, but close attention was also paid to airflow through the engine bay to maximise cooling. It is a perfect illustration of the strenuous yet conflicting demands that the World Rally Championship imposes. Downforce is a vital element of a competitive car on high-speed rallies, but good cooling is a key requirement on a Turbocharged rally car, as the ambient temperature on rallies can exceed 30 degrees Celsius and it is often highest on the rallies held at the lowest average speeds. Airflow beneath the car was also considered.

In designing the chassis, the emphasis has been not just on good handling, but on strength, simplicity and ease of maintenance. The car uses MacPherson strut suspension all round. It is a robust system and to make servicing straightforward, components are often interchangeable not only front and rear, but left to right as well. Most suspension components will be made of steel, to ensure reliability. The Lancer WRC04 will use specially modified Ohlins dampers, like its recent predecessors, building on a fruitful past relationship. The steering rack and crossmembers are also new designs, partly because the engine has been relocated, tilted 20 degrees rearwards to improve weight distribution.

The 16-valve, twin-cam, two-litre engine belongs to the 4G6 family used so successfully in previous Lancers. It employs the well proven cast iron block and an aluminium alloy cylinder head, but it has also benefited from significant alteration. First and foremost, it is based on the version of the engine fitted to the new and highly popular Lancer Evo VIII showroom car, but with a new Turbocharger, fitted with the regulation 34-millimetre intake restrictor, new intake and exhaust manifolds, and new internals. Although the bore and stroke remain unchanged, the crankshaft, connecting rods and pistons have been lightened and the electronic management systems are new. MMSP has turned to Magneti Marelli to supply its electronics for the first time, using an advanced engine management package that doesn't rely on fuses or circuit breakers. There are two control units, one for the engine and one for the chassis. As the system is fully integrated, each is capable of controlling all electronic functions throughout the car. The system saves weight and enhances reliability.

The transmission also reflects MMSP's new strategy and has nothing in common with the four-wheel-drive systems used on previous Lancers. The 2004 car will use a transversely mounted five-speed gearbox supplied by Ricardo. The gearchange will be manual and all three differentials will be passive, an epicyclic centre differential splitting torque front to rear. The front and rear differentials will also operate on mechanical principles.

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