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INDY: Honda's 2004 Engine

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September 10, 2004

 2004 Honda IRL Engine

2004 Honda IRL Engine

Honda's engine for the 2004 IRL IndyCar Series is designated the HI4R Series Indy V-8. This engine is a development of the design created in partnership with Ilmor Engineering for the 2003 IndyCar Series, Honda's inaugural season in the Indy Racing League.

The HI4R will be modified in accordance with IRL regulations coming into effect in May, 2004, reducing engine displacement from 3.5 liters to 3.0 liters.

Last year, Honda's first in the IRL, the company posted two race wins and three pole positions. Andretti Green Racing driver Tony Kanaan won at Phoenix, collected all three Honda poles, and remained in contention for the series championship until the final race of the season. Teammate Bryan Herta won at Kansas Speedway, while third AGR driver Dan Wheldon secured series Rookie of the Year honors.

Prior to entering the IRL, Honda previously took part in the Championship Auto Racing Teams series from 1994-2002, where the company won four CART Manufacturers' Championships (1996, 1998, 1999 and 2001) and six consecutive drivers? titles (1996-2001).

Teams and drivers utilizing the Honda HI4R engine in 2004 include Andretti Green Racing with Tony Kanaan, Dario Franchitti, Bryan Herta and Dan Wheldon; Super Aguri Fernandez with IRL rookie driver Kousuke Matsuura; Team Rahal with Buddy Rice and Access Motorsports with owner/driver Greg Ray.


Engine Type: Normally aspirated, fuel-injected, aluminum alloy cylinder block V-8
Displacement: 3.5 liters (213.6 cubic inches) through April, then reduced to 3.0 liters
Valve Train: Dual overhead camshaft, four valves per cylinder
Crankshaft: Alloy steel, five main bearing cap
Pistons: Forged aluminum alloy
Connecting Rods: Machined alloy steel
Engine Management: Motorola
Ignition System: CDI
Lubrication: Dry sump
Cooling: Single water pump

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