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| Category | IndyCar Series |
|---|---|
| Constructor | Dallara |
| Predecessor | Dallara IR-02 |
| Successor | Dallara DW12 |
| Technical specifications | |
| Chassis | Carbon fiber monocoque with honeycomb structure[3] |
| Suspension (front) | double wishbones, pull rod actuated coil springs over shock absorbers |
| Suspension (rear) | double wishbones, push rod actuated coil springs over shock absorbers |
| Length | 192 in (4,877 mm) on medium and long ovals; 196 in (4,978 mm) on short ovals and road/street courses |
| Width | 77.5–78.5 in (1,968–1,994 mm) minimum (Road/Street) |
| Wheelbase | 118–122 in (2,997–3,099 mm) |
| Engine | Chevrolet Indy V8 (2003-2005),Honda Indy V8 (2003-2011)Toyota Indy V8 (2003-2005) 3.0–3.5 L (183–214 cu in) 90°N/AV8 with 4-stroke piston Otto cyclemid-engined, longitudinally-mounted |
| Transmission | Xtrac#P295 6-speedsequential (2003-2008) latersequentialsemi-automatic paddle-shift (2008-2011) + no reverse (2003-2009),[4] later 1 reverse (must have reverse only for road/street courses; 2010-2011) |
| Power | ~ 650horsepower (485kilowatts) (2003-2008)[5] 650horsepower (485kilowatts) + 20horsepower (15kilowatts) on push-to-pass (2009) 650horsepower (485kilowatts) + 40horsepower (30kilowatts) on push-to-pass 500.0newton-metres (368.8pound force-feet) |
| Weight | 1,525–1,565 lb (692–710 kg)[6] on ovals; 1,600–1,640 lb (726–744 kg) (road and street courses) |
| Fuel | 100%methanol (2003-2005) EPIC 10%ethanol + 90%methanol (2006) EPIC 98%ethanol + 2%gasoline (2007-2009)[7] Sunoco 98%ethanol + 2%gasoline (2010-2011) |
| Lubricants | Various per teams |
| Tyres | Firestone Firehawk |
| Competition history | |
| Debut | 2003 Toyota Indy 300 |
TheDallara IR-03, and its evolution, theDallara IR-04/05, is an open-wheelformularacing car developed and produced by Italian manufacturerDallara for use in theIndyCar Series, between2003 and2011.[8][9]
Starting from 2007 season, all IndyCar Series entrants (outside the Indy 500) utilized the IR-05 chassis version after Panoz defected toChamp Car World Series to replace Lola as the spec chassis supplier for that series in the same season. In 2009 one year after IndyCar unified with Champ Car all entrants (including entrants for the Indy 500) used the IR-05 making it the only chassis used in IndyCar from 2009 to 2011.
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