The Verizon IndyCar Series have announced updates to the 2016 rulebook which include:
- Established a rulebook for aerodynamic bodywork parameters for each of the five ovals on the 2016 Verizon IndyCar Series schedule. The aero specifications for each oval include – Phoenix International Raceway which will see a 2016 return of indy car racing for the first time in eleven years which will use the same aero kit as the one at Iowa Speedway in 2015.
- Indianapolis Motor Speedway and Pocono Raceway will run the same aero configuration as in 2015, with the addition of rear wheel guard infills that were implemented at Texas Motor Speedway in 2015, as well as a domed skid plate underneath the car and rear wing beam flaps. The skid plate and beam flaps were announced Nov. 24 as part of INDYCAR’s continuously evolving safety enhancements.
- Texas Motor Speedway’s aero configuration, which included the rear wheel guard infills in 2015, will add the domed skid plate and rear wing beam flaps in 2016, plus see a slight increase in available downforce.
- Iowa Speedway will see a slight reduction in available downforce due to a reduction in rear wing angle.
The 100th edition of the Indianapolis 500 takes place in 2016 and IndyCar has made changes to qualifying for the event.
- Under the updated regulations, the provisional field of 33 cars for the 100th Running of the Indianapolis 500 will be set on the first day of qualifications at the Indianapolis Motor Speedway oval on May 21, 2016. This means that any traditional “bumping” of cars from the field of 33 will take place on the first day of qualifying.
- Procedures for the second day of 2016 qualifying, scheduled for May 22, will see race starting positions among the 33 provisional qualifiers finalized.
Race finishes for the Indianapolis 500 and the final event at Sonoma will be worth double points. The winner of the Indianapolis 500 and the winner of Sonoma will receive 100 points while at the Indianapolis 500 points will be awarded right down to the 33rd finisher.
Points for qualifying for the Indianapolis 500 will be awarded by the final qualifying positions while the winner of the Verizon P1 Award will receive 42 points, the second placed driver will receive 40 points.
- The Indianapolis 500 rookie orientation test has changed its three phases for new drivers to be approved for competition. The phases for 2016 are: 10 laps at 210-215 mph, followed by 15 laps at 215-220 mph and 15 laps at 220-plus mph. Each phase sees an increase of 5 mph from 2015.
- Turbocharger boost pressure for the Chevrolet and Honda twin-turbocharged, 2.2-liter V-6 engines when push-to-pass overtake assist is engaged on road and street courses will increase from 160 to 165 kilopascals (kPa), yielding approximately 20 added horsepower. INDYCAR announced this change Dec. 15.
- Both engine manufacturers will use a uniform Sunoco E85R fuel in 2016, with the removal of an additive (HiTEC 6590) previously allowed for Chevrolet.
- The minimum car weight has been increased to accommodate for safety enhancements including the Suspension Wheel/Wing Energy Management System (SWEMS) additional bodywork component tethers announced Nov. 24. The car weights will increase 10 pounds to 1,610 pounds on road and street courses and short ovals, and to 1,580 pounds on superspeedways.
- The pit speed limit at all ovals will be 50 mph, another safety initiative. In 2015, the limit on superspeedways was 60 mph.
- A rules clarification stipulates that all cars using the Honda aero kit must include the chassis center line wicker. Cars using the Chevrolet or stock Dallara aero kit may not include the chassis center line wicker.
- During race weekends that include a promoter test day, teams are permitted to carry over one used set of tires from the promoter day to the next practice session of the weekend, but must return the set after that session.