| |
 |
 |
| |
IndyCar |
NASCAR |
| Type |
Open Wheel, Open Cockpit, ground-effect underbody with wings front and rear |
Sedan, Closed Cockpit with front splitter and rear wing |
| Construction |
Monocoque cockpit with engine as member of chassis connecting gearbox and rear suspension |
Tubular welded frame with all suspension, engine and cockpit as one unit with 24 gauge sheet metal body |
| Materials |
Carbon fiber, kevlar and other composites |
Steel pipe tubing, aluminum, sheet metal, Energy Absorbing Materials and limited carbon fiber |
| Weight |
1,565 lbs minimum for ovals and 1,630 lbs minimum for road courses. Does not include fuel or driver. |
3,450 lbs for all tracks including all fuel and fluids. Does not include driver weight. |
| Height |
Approximately 38 inches at highest point |
38 inches is the rear deck lid/trunk measurement |
| Wheelbase |
121.5 to 122 inches |
109.5 to 110 inches |
| Wheels |
Front: 15 inches diameter, 10 inches wide Rear: 15 inches diameter, 14 inches wide, single lug, magnesium |
Front and Rear are the same: 15 inches diameter, 9.5 inches wide, 5 lug, steel |
| Tires |
Firestone Firehawk Radial: All four tires on ovals differ |
Goodyear Eagle Radial: Front and Rear are the same tire whereas the Right and Left sides differ |
| Gearbox |
XTRAC with six forward gears, Mega-Line Assisted Gear Shift (paddle shift) |
Standard manual four forward gears in H-shift pattern |
| Fuel Cell |
Single, rupture-proof cell, 22 U.S. Gallons |
Protective, puncture-resistant bladder, 17.75 U.S. Gallons |
| Engine |
|
|
| Type |
3.5 Liter (183.07 cubic inches) V-8, 32 valve dual-overhead cam (DOHC), Electronic Fuel Injected (EFI) |
350 cubic inches, V-8, 16 valve, Carbureted |
| RPM |
10,300 maximum (league supplied rev limiter) |
Approximately 10,000 (mandated gear ratio rule limits maximum RPM) |
| Power |
Estimated 650 horsepower |
Estimated 850 horsepower |
| Fuel |
100 percent fuel-grade ethanol |
Sunoco unleaded racing fuel |