F3 - Technical Primer

Engines: Piston engines, production block and cylinder head, annual production of at least 2,500 units. Four-stroke engine, maximum number of cylinders: four. Air restrictor Ø 26 mm. The use of magnesium and supercharging is banned.

Gearbox: Sequential 6-speed gearbox.

Capacity: Maximum 2,000 cc, bore and stroke are free.

Tyres: Exclusively KUMHO ECSTA, limited to 60 sets of tyres per season per team. Three sets of tyres per weekend per team. Two sets of wet-weather tyres per race weekend, but their use is allowed in the case of a ‘Wet Race’ only. Tyres to be filled with environmental air or nitrogen; chemical or mechanical treatment is prohibited. Tyre dimensions: 180/550 R 13 front, 240/570 R 13 rear. Tyre heaters are not allowed.

Wheel rims: maximum width 11.5“, maximum Ø 13“.

Chassis: Stepped floor, crash boxes at the front and the rear Two roll-over structures. No change of chassis during an event.

Minimum weight: 540 kg (car including driver in full race gear and including all fluids apart from fuel).

Tank: FIA/FT3 homologated rubber safety tank.

Fuel: Standard fuel Aral Ultimate 100, no refuelling is allowed during qualifying and race. After qualifying and race, 1 kg of fuel still has to be in the fuel system.

Telemetry (data radio): Not allowed.