The iRacing INDYCAR Hybrid system is officially in development.
In the May 2025 update, iRacing confirms that its physics and engineering teams have started building the hybrid architecture used in the current NTT INDYCAR Series. The feature will model the hybrid unit’s manual deployment system, giving drivers control over power boosts during races.
This hybrid update is one of the most technical projects ever undertaken by iRacing’s vehicle dynamics group. It aims to recreate how modern INDYCAR drivers balance energy storage, boost timing, and battery recovery over a full race distance.
How the System Works
In real life, INDYCAR’s hybrid unit allows drivers to deploy stored energy for short bursts of speed. Unlike Formula 1, the system is manual, meaning drivers choose exactly when to engage it. iRacing plans to simulate that feature with a new in-car control, giving players direct management of their hybrid boost.
Developers say they are also redesigning parts of the car’s physics core to support the new hybrid model. This includes battery state tracking, regeneration behavior, and a data link between the internal combustion engine and electric systems.
A New Challenge for Sim Racers
The iRacing INDYCAR Hybrid adds a new layer of strategy to open-wheel racing.
Drivers will have to decide when to deploy extra power for overtakes or defense while managing energy across stints. It should also change how players approach qualifying and fuel saving.
Because the hybrid system affects balance and weight distribution, engineers are testing its impact on car setup. For example, power delivery from the electric motor changes corner-exit handling and rear-tire wear. As a result, the hybrid version of the Dallara IR-18 will feel different from its current non-hybrid counterpart.
Development Timeline
According to the blog post, the hybrid project began early this year and will continue through multiple testing phases. The new architecture is being designed to handle future hybrid and electric cars across other racing series. This approach ensures that the work done for INDYCAR will benefit iRacing’s long-term vehicle technology.
While the hybrid system is still in early development, iRacing says the first in-sim tests are expected later this summer. If successful, the feature could reach members in a future build once performance and user controls are finalized.
The addition of a hybrid system brings iRacing closer than ever to real-world INDYCAR technology. It highlights the studio’s effort to keep pace with current racing trends while adding more depth for serious sim racers. For fans of open-wheel competition, this update signals a new era of strategy, performance management, and realism inside the sim.
