Toyota GR Supra GT4 Concept Unveiled Before Geneva
Toyota will also be showing the concept of its all new Supra racing version at the Geneva Motor Show. GR Supra GT4 Concept is a design and engineering study that explores how the new generation Supra could be developed as a competitive car for international racing in the GT4 category, accessible and appealing to both private drivers and small teams who have a tight budget.
This Toyota GR Supra model has key qualities that make an attractive proposal for the GT4 racing model with a perfectly balanced chassis with a 2-seater cab with a very rigid and lightweight body with a rear-wheel drive and a center of gravity that is very low.
The combination of short wheelbase and wide gauge gives it an ideal ratio for excellent stability and agility, which are valuable features in a sporty series where regulations use a performance balance (weight adjustment based on engine power) to even competition on the ground.
A specially-designed front diffuser and rear wing have been added to the GR Supra GT4 Concept to improve airflow around the chassis, reducing drag and optimising downforce. Both items are constructed using composites made from natural fibres such as hemp and flax, replacing the traditional carbon fibre in order to reduce the impact on the environment. Original alloy wheels have been replaced by five-hole OZ 11 x 18in racing wheels.
The MacPherson strut front and multilink rear suspension design is carried over, but with the addition of competition springs, shock absorbers and anti-roll bars. The high-power deceleration required for racing is provided by high-performance Brembo brakes.
Under the bonnet, the GR Supra GT4 Concept retains the 3.0-litre straight-six-cylinder petrol engine with single twin scroll turbocharger, coupled to an automatic transmission. Performance is increased with help from a motorsport-grade ECU and bespoke wiring looms. There are also motorsport-specification drive shafts and limited slip differential.
The stripped-out cabin is fitted with a high-strength roll cage and FIA-standard fire extinguisher and OMP racing seat. The concept car is also equipped with a motorsport-specific fuel tank and a fast refuelling system.
GT4 is one of the world’s fastest-growing motorsports categories, with national and regional competitions in Europe, North America, Asia and Oceania. Established since 2006 and sanctioned by the FIA, it is designed to be a value-for-money series for both professional and amateur racers, and a potential stepping-stone to GT3 competition.
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