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IndyCar Series

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The NTT IndyCar Series represents the highest level of American open-wheel car racing.

18 Sebastien Bourdais Kohler Grand Prix 2018
18 Sebastien Bourdais Kohler Grand Prix 2018

Open-wheel racing features cars where the wheels are not covered by a body. This series has been organized by different groups since 1920. Today, it is managed by IndyCar, LLC. The most famous event in this series is the Indianapolis 500. This legendary race was first held in 1911. For many fans, this series is a central part of American motorsport culture.

Racing technology relies on a specific mechanical setup to ensure competition. Every team in the series uses the same chassis, which is the structural frame of the car. Currently, the Italian company Dallara provides this specification chassis to all teams.

Defense.gov photo essay 120527-A-MG757-086
Defense.gov photo essay 120527-A-MG757-086

While the frames are identical, manufacturers can develop different engines. Honda and Chevrolet are the two primary engine providers. The cars also use a specific transmission system. Since 2008, they have used an AGS 6-speed semi-automatic sequential gearbox. This system uses an electro-pneumatically operated paddle-shift system for the drivers.

Historically, the series has seen many different types of chassis manufacturers. In the early years, companies like Lola and Reynard built cars for the CART series.

Indy500winningcar2000
Indy500winningcar2000

After 1996, the Indy Racing League introduced new rules for less expensive cars. This move changed the technical landscape by outlawing turbocharged engines. Four manufacturers have been approved to build IndyCar chassis over time. Dallara has been the most successful, with 17 Indianapolis 500 winners using their frames as of 2017. Other builders included G Force, which was later owned by Panoz, and Riley & Scott.

JLazierIndy07
JLazierIndy07

The history of the sport includes a period of intense rivalry known as "The Split." This began in 1994 due to a disagreement between CART and Tony George. This conflict led to the creation of the Indy Racing League in 1996. The rivalry caused the popularity of open-wheel racing in the United States to decline. The two sides finally merged in 2008 to form the modern IndyCar banner. This merger helped unify the history and statistics of the competing series. Since that merger, the series has seen slight viewership gains each year.

In 2012, the series moved to a single-make chassis formula to control costs.

Defense.gov photo essay 120527-A-MG757-086
Defense.gov photo essay 120527-A-MG757-086

The Dallara IR-12 chassis was introduced at a price of $349,000 per unit. This model included safety features like a partial enclosure around the rear wheels. This design helps prevent cars from climbing over the back of another vehicle. The chassis was also nicknamed the DW12 to honor driver Dan Wheldon. Between 2015 and 2017, teams used specialized aero kits to increase speeds. These kits were developed by the engine manufacturers, Chevrolet and Honda.

2017 Indianapolis 500 Carb Day Pit Stop Challenge - 04
2017 Indianapolis 500 Carb Day Pit Stop Challenge - 04

To improve efficiency, the series introduced the IR18 chassis in 2018. This version uses a universal bodywork kit known as the UAK18. This design is more streamlined and reduces the number of small parts that can break. It also lacks the air inlet above the cockpit found on older models. In 2020, the series added the "aeroscreen" to the cockpit.

Aeroscreen on Juan Pablo Montoya Dallara DW-12 UAK-18
Aeroscreen on Juan Pablo Montoya Dallara DW-12 UAK-18

This device provides essential protection for the driver from flying debris.

AlexBarronGarage2007Indy500
AlexBarronGarage2007Indy500

The series is constantly looking toward the next generation of technology. Engineers are currently planning for the successor to the DW12 chassis. On December 16, 2024, IndyCar announced wind tunnel testing for the new Dallara IR-27. This new chassis was originally expected to debut in 2027. However, a later announcement in June 2025 delayed the debut to 2028. The new model will be renamed the Dallara IR-28. This ongoing development ensures the sport remains at the cutting edge of racing.

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🖼️ Images & Media (9)
File:Indy500winningcar2000.JPG
Indy500winningcar2000.JPG
File:JLazierIndy07.jpg
JLazierIndy07.jpg
File:ScottSharpJune2007.jpg
ScottSharpJune2007.jpg
File:Defense.gov photo essay 120527-A-MG757-086.jpg
Defense.gov photo essay 120527-A-MG757-086.jpg
File:2017 Indianapolis 500 Carb Day Pit Stop Challenge - 04.jpg
2017 Indianapolis 500 Carb Day Pit Stop...
File:18 Sebastien Bourdais Kohler Grand Prix 2018.jpg
18 Sebastien Bourdais Kohler Grand Prix 2018.jpg
File:Sage karam cockpit (47966366346).jpg
Sage karam cockpit (47966366346).jpg
File:Aeroscreen on Juan Pablo Montoya Dallara DW-12 UAK-18.jpg
Aeroscreen on Juan Pablo Montoya Dallara...
File:AlexBarronGarage2007Indy500.jpg
AlexBarronGarage2007Indy500.jpg
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