IRL: Principles, Engine Specs & Manufacturers Guidelines
18 November 1998
- 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
