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IRL: Principles, Engine Specs & Manufacturers Guidelines

• Preserve and nurture the heritage of open-wheel, oval track racing
• Control costs associated with racing, emphasizing safety and equality of competition
• Provide opportunities for new participants and fans
• Bring Indy car racing to new markets
• Provide a governing structure that represents all participants fairly and equitably

Engine Specifications
Years 2000-2004

New

• 3.5 liters (213.580 cu. in.)
  (reduced from 4 liters)
• 180 degree (flat) crankshaft optional
• New programmable rev limiter (1999)
  Independent system
• No longer production-based
  Submitted by manufacturer
  Meets IRL specifications

Current Specifications Maintained

• 8 cylinder 90 degree V DOHC
• Four camshafts/four valves per cylinder
• Maximum bore size 93 mm
• Current bore centers maintained
• Engine weight 340 lbs.
• Front motor mount location
• Rear bellhousing mounts
• Fuel pump drive locations
• Deck height 8.1 in.
• Centerline crank to bottom sump 4.5 in.

Advantages

• Current Engines Updated, Not Obsoleted
  Shorten stroke to reduce displacement
  Bore centers maintained
  Cost estimate to update 1999 engine $10,000
  (crankshaft, four camshafts, rods)
• Improved Engine Reliability
  1999 - 10,300 rpm (maximum)
  2000 - shorter stroke to reduce piston speed
• Reduced Operational Cost ($45.00/mile)
• Universal Chassis Interchangeability Maintained (Standardized)
  Front motor mounts
  Rear bell housing mounts Fuel pump location
• Stable Horsepower/Speed Control
  Duration of formula
  Reduce revs/minute (rpm)
  Decrease displacement (shorten stroke)
  Adjust for tire/aerodynamic improvements
• Alter Engine Pitch and Tone
• Revitalize After-Market Engine Builders
  Cottage Industry

Engine Manufacturer Guidelines

• Engines and parts of equal specifications must be available for sale to any competitor
• Engines and parts must be available at a controlled price

  				Example:	 (1999)
  				Assembled cost	$83,000
  				Unassembled      78,000

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