YARIS WRC TECHNICAL SPECIFICATIONS
Chassis: Type
Brakes Wheels Tyres Dimensions Steel body shell
300mm discs on gravel, 355mm on tarmac
7 x 15” gravel, 8 x 18” tarmac
Michelin
Length: 3910 mm / Width: 1820 mm
Powertrain: Engine capacity 1.6 litres Type
Petrol Turbo pressure
Air restrictor Power
Torque Max revs
Transmission Clutch
In-line four-cylinder
Direct injection Up to 200bar Fuel
2.5bar absolute (maximum)
33mm
Around 300hp (at 6,000rpm)
420Nm 8,500rpm
Six-speed sequential ZF Sachs
TMG’S GLOBAL RACE ENGINE
The Yaris WRC makes use of the TMG-developed Global Race Engine, a 1.6-litre turbo designed to suit a range of championship entries. The ‘GRE’ project, as it is acronymically known within TMG, started in 2010 and ran for the first time in 2012.
Development has utilised a wide range of facilities at TMG’s Home of High Performance. While calculations such as Computational Fluid Dynamics (CFD) is best known for aerodynamic simulations, it is also used alongside Finite Element Analysis Method (FEM) to optimise efficiency and performance at the design stage. Details such as injector nozzle shape, spray pattern and fuel spray velocity as well as gas flows through the turbocharger are all simulated extensively before physical production.
With highly accurate five-axis milling machines and CNC turning machines, creating a new engine from the design is also done in- house at TMG. Once built, the extensive test facilities – including a suite of engine dynamometers – ensure calibration to the expected performance parameters being drivability, reliability, fuel consumption and efficiency, lubrication testing, heat and friction analysis as well as overall power and torque.
The four-cylinder started track testing in a rally car in March 2014 as part of a programme designed to expose the engine to the stresses of in situ running. It is now being put through its paces in the Yaris WRC with its competitive WRC debut set for the start of 2017 – a Global Race Engine on a global rally stage.
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