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
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.