The iRacing TCR Season 2 update overhauled the entire class from top to bottom. The Audi RS3 LMS Gen2 TCR leads the charge as the new default car. However, the changes go far beyond a single model. iRacing rebuilt the tires, updated the engines, adjusted the fuel capacity, and reworked the handling across the board. Here’s a breakdown of every major change.
New Tire Parameters: Both Dry and Wet
iRacing rebuilt every tire in the TCR class using their latest physics model. The new slicks offer better feel at the limit and clearer grip communication. Additionally, all TCR cars now support wet-weather tires. You can pit for wets during dynamic weather or start on them from the grid. Consequently, mixed-condition racing opens up for the class for the first time.
Engine Updates Across the Board
iRacing updated the engine maps for every TCR car in the class. Power delivery feels more authentic now. The Audi RS3 LMS Gen2 TCR in particular benefits from refined torque curves that match its real-world counterpart. Furthermore, engine braking behavior changed slightly across all models. You may notice the car responds differently on corner entry when you lift off the throttle.
Fuel Level Updated to 85 Liters
The maximum fuel capacity now sits at 85 liters for all TCR cars. iRacing made this change to match real-world regulations. In practice, this affects your pit strategy for longer races. Specifically, you can run longer stints before pitting. Adjust your fuel calculations accordingly.
Driveline Losses Redistributed
iRacing redistributed how driveline losses affect each car. The power reaching the front wheels now reflects more accurate transmission and differential losses. As a result, you may notice small differences in straight-line speed compared to previous seasons. The changes improve authenticity rather than favoring any single manufacturer.
Brake System: Proportioning Valve Added
iRacing added a proportioning valve to the brake system for TCR cars. This gives you more control over front-to-rear brake bias. Moreover, the overall brake feel improves with the new valve. You can fine-tune braking balance for specific tracks and conditions. Trail braking into corners becomes more predictable as a result.
Aerodynamics: Side-Forces and Mapping Updated
iRacing updated the aero maps for all TCR cars. Side-force calculations now reflect more realistic behavior in crosswinds and high-speed corners. Additionally, the front splitter and rear wing interactions produce more consistent downforce levels. These changes affect high-speed stability and corner-entry balance. You may need to adjust your aero settings at faster circuits.
Ride Height Limits Now Include the Front Splitter
The ride height rules now account for front splitter clearance. Previously, you could run aggressive ride heights without penalty. Now, the splitter sets a practical floor. This change prevents unrealistic setups and creates a more level playing field. Adjust your ride height accordingly before your first race.
Toe Adjustment Calculations Updated
iRacing refined how toe angle adjustments translate to on-track behavior. The new calculations produce more accurate tire wear patterns and cornering response. In particular, front toe-out settings now have a more noticeable effect on turn-in. Check your alignment settings and test them before committing to a race setup.
Handling: More Consistent Through the Whole Corner
The combined effect of all these updates makes the TCR cars feel more consistent from entry to exit. Weight transfer responds more naturally to driver inputs. Meanwhile, the Audi RS3 LMS Gen2 TCR specifically benefits from improved mid-corner balance. The car rotates more predictably and rewards smooth driving. Aggressive inputs still cause snap oversteer, but the threshold feels more gradual now.
What iRacing TCR Season 2 Regulars Should Do First
Start with a fresh baseline setup. The tire and aero changes alone invalidate most old setups. Test the new brake proportioning valve early. It offers more tuning range than the old system. Furthermore, recalculate your fuel strategy with the 85-liter tank. Finally, spend a few practice sessions relearning the grip limits. The iRacing TCR Season 2 update rewards drivers who take time to adapt rather than forcing old habits onto the new physics.
