What is the formula for the IRL cars?
The cars are single-seat, open-wheel, open-cockpit, rear-engined cars with aerodynamic aids. Significant features of the car formula: • Dimensions: Length 192-195 in. (488-495 cm) nose to tail, minimum 110 in. (280 cm) wheelbase, hub center to hub center / Width 78 in. (198 cm) at outside rear wheel rims / Height 38 in. (96.5 cm) nominal at rear wing; may vary according to IRL-mandated wing settings • Weight: 1620 lbs. (737 kg) race ready, minus fuel and driver • Construction: Monocoque (that’s unibody to us Americans) central tub with nose attachment, engine and gearbox as stressed members. A tray runs under the engine as additional support and to catch leaking fluids. • Materials: Tub and bodywork all carbon fiber. Engine block aluminum; gearbox case magnesium; wheels magnesium; suspension members aluminum or carbon fiber. • Fuel: 100% methyl alcohol (methanol); no additives permitted. Onboard capacity 35 gal. U.S. (~143 l). Fuel allocation per race is 275 gal. U.S. (~1127 l) per car
