iRacing’s NASCAR content is being updated to better reflect how the cars perform in the real-world current season.
It’s true that recent updates to the Cup Series cars already allow drivers to experience many of their latest characteristics. These cars now include all the real-world evolutions introduced for the current season, including engine power and aerodynamic properties aligned with the official rule packages for each type of track.
The NASCAR O’Reilly Series (Class B) has received improvements to the drafting model, now based on the latest iRacing version using CFD (Computational Fluid Dynamics). Side-drafting is expected to be more accurate, while the variability in understeer and oversteer becomes more complex when cars are running in close proximity.
iRacing is also updating its IndyCar for this new season. The Dallara IR18 has been refined for short ovals and Indianapolis, bringing it more in line with the setups used on these tracks in real life. These updates impact both aerodynamics and tire construction, while engine power has been adjusted across all track types, increasing the car’s top speed.
Oval tracks also continue to evolve in iRacing Season 2. The focus remains on surface behavior, particularly rubber build-up and the effectiveness of the racing line. Some of the improvements introduced this season relate to how much rubber is laid down during more intense races and how much tires can accumulate during caution periods. This is an ongoing development effort that will continue over time.
