Dallara IR-03

The Dallara IR-03, and its evolution, the Dallara IR-04/05, is an open-wheel formula racing car developed and produced by Italian manufacturer Dallara for use in the IndyCar one-make spec-series, between 2003 and 2011.[8][9]

Dallara IR-03/04/05[1]
Dallara IR-05[2]
CategoryIndyCar Series
ConstructorDallara
PredecessorDallara IR-02
SuccessorDallara DW12
Technical specifications
ChassisCarbon fiber monocoque with honeycomb structure[3]
Suspension (front)double wishbones, pull rod actuated coil springs over shock absorbers
Suspension (rear)double wishbones, pull rod actuated coil springs over shock absorbers
Length192–196 in (4,877–4,978 mm)
Width77.5–78.5 in (1,968–1,994 mm) minimum (Road/Street)
Wheelbase118–122 in (2,997–3,099 mm)
EngineChevrolet 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/A V8 with 4-stroke piston Otto cycle mid-engined, longitudinally-mounted
TransmissionRicardo or Xtrac #P295 6-speed sequential (2003-2008) later sequential semi-automatic paddle-shift (2008-2011) + no reverse (2003-2009),[4] later 1 reverse (must have reverse only for road/street courses; 2010-2011)
Power~ 650 hp (485 kW) (2003-2008)[5]
650 hp (485 kW) + 20 hp (15 kW) on push-to-pass (2009)
650 hp (485 kW) + 40 hp (30 kW) on push-to-pass
Weight1,525–1,565 lb (692–710 kg)[6] on ovals; 1,600–1,640 lb (726–744 kg) (road and street courses)
Fuel100% methanol (2003-2005)
EPIC 10% ethanol + 90% methanol (2006)
EPIC 98% ethanol + 2% gasoline (2007-2009)[7]
Sunoco 98% ethanol + 2% gasoline (2010-2011)
LubricantsVarious per teams
TyresFirestone Firehawk
Competition history
Debut2003 Toyota Indy 300

References
  1. "2003 - 2006 Dallara IR-03 Honda Specifications". Ultimatecarpage.com.
  2. "Dallara Chassis - IndyCar.com". November 24, 2010. Archived from the original on 2010-11-24.
  3. "Chassis Manufacturers :: IndyCar Series". Archived from the original on 2007-11-03. Retrieved 29 July 2022.
  4. "IndyCar® Series". May 26, 2005. Archived from the original on 2005-05-26.
  5. "IndyCar® Series". May 8, 2005. Archived from the original on 2005-05-08.
  6. "IndyCar® Series". May 19, 2005. Archived from the original on 2005-05-19.
  7. "IndyCar Series Technical Update Press Conference". Archived from the original on 2007-11-14. Retrieved 29 July 2022.
  8. "Indy Car".
  9. "2009 Dallara IR06 News and Information, Research, and Pricing". conceptcarz.com.
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