2018 Dallara Chassis

Manufacturer: Dallara Automobili, Italy.

Model: Fourth-generation Dallara IR-12 chassis (2012-present).

Construction: Monocoque contains cockpit, fuel cell and front suspension; engine is stressed (integral) member of chassis; rear assembly contains bell housing, gearbox and rear suspension members.

Materials: Carbon fiber, Kevlar and other composites.

Weight: Approximately 1,620 pounds (road/street/short ovals) and 1,590 pounds (superspeedways); does not include fuel/driver/drink bottle and contents/driver equivalency weight.

Length: 196 inches.

Width: 79.050 inches; Front wing width: 76.150 inches (road/street/short ovals); 70.090 (superspeedways); Rear wing width: 44.755 inches (road/street/short ovals); 52.3 (superspeedways).

Height: Approximately 40 inches.

Wheelbase: 117.5 to 121.5 inches.

Wheel size front: 15 inches diameter, 10 inches wide; minimum weight: 13.48 pounds.

Wheel size rear: 15 inches diameter, 14 inches wide; minimum weight: 14.7 pounds.

Tires: Firestone Firehawk.

Front diameter: 26 inches maximum, 25 inches minimum @ 35 psi.

Rear diameter: 27.5 inches maximum, 26.5 inches minimum @ 35 psi.

Brakes: PFC six-piston, monobloc aluminum calipers, with lightweight
carbon brake discs.

Suspension: Double wishbone, independent pushrod suspension with
anti-roll bars (front and rear).

Dampers: Adjustable, coil over damper.

Gearbox: XTRAC #1011 gearbox; six forward gears, one reverse gear;
Mega-Line Assisted Gear Shift (paddle shift).

Fuel cell: Single, rupture-proof cell, 18.5 U.S. gallons (standard).

2018 Chevrolet Engine Specifications

Manufacturer: Chevrolet.

Model: Chevy IndyCar V6.

Type: 2.2-liter (234.25 cubic inches), twin-turbocharged V-6,
maximum bore diameter 95 millimeters.

Weight: Minimum weight 248 pounds.

RPM: 12,000 maximum (INDYCAR-supplied rev limiter).

Turbocharging: Twin BorgWarner 6758 turbochargers.

Maximum boost pressure (above atmosphere):
300 mbar / 4.35 psi (superspeedways).
400 mbar / 5.8 psi (short ovals).
500 mbar / 7.25 psi (road/street courses).
600 mbar / 8.70 psi (push-to-pass).

Power: Estimated 550-700 horsepower, depending on turbo boost pressure used at track.

Fuel: Sunoco E85R fuel (blend of 85 percent ethanol and 15 percent gasoline).

Injectors: Maximum two injectors per cylinder, one for direct injection,
300 bar maximum fuel system pressure (4,351 psi).

Engine control unit: McLaren Applied Technologies TAG 400i.

Throttle: Drive-by-wire controlled port throttles.