iRacing News

[h2]2025 Season 4 Patch 4 Release Notes \[2025.11.18.02][/h2][p]
[/p][p]This Patch Release contains important fixes as well as some updates for the 2025 Season 4 Release.[/p][p]

[/p][h2]Simulation:[/h2][p][/p][h3]Performance[/h3]

• [p]Fixed a recent and prevalent issue where framerate significantly drops after racing for some length of time.[/p]

[p][/p][h3]Race Control[/h3]

• [p]Slightly improved the precision used for verifying missed checkpoints and course cut black flags.[/p]

[p][/p][h3]AI Racing[/h3]

• [p]AI Drivers have improved their racing skills at Circuit des 24 Heures du Mans.[/p]

[p][/p][h3]Audio[/h3]

• [p]Fixed an issue where the RPM on nearby opponent cars could appear to sound substantially too high.[/p]

[p][/p][h3]User Interface[/h3]

• [p]Improved the performance and functionality of the Skew (S) meter.[/p]
• [p]Corrected some bindings for Best Times and Delta Times.[/p]
• [p]Add a subtle background to the Player’s entry for Relative Brake Bias.[/p]
• [p]Fixed an issue in Settings where the FOV calculator would not accept text inputs.[/p]
• [p]Fixed an issue where the Custom Sector box was not showing +/- time correctly.[/p]
• [p]For the Camera Tool, fixed a crash-to-desktop error with the context menu.[/p]

[p][/p][h3]Controls[/h3]

• [p]Updated to the latest Simucube API.[/p]

[p]

[/p][h2]Cars:[/h2][p][/p][h3]Audi 90 GTO[/h3]

• [p]Brake bias adjustments are now allowed in Fixed Setup events.[/p]

[p][/p][h3]Cadillac CTS-V Racecar[/h3]

• [p]During pit stop repairs, all vehicle damage may now be fully repaired.[/p]

[p][/p][h3]Ford Mustang GT4[/h3]

• [p]Improved windshield wiper animations and visual effects.[/p]

[p][/p][h3]HPD ARX-01c[/h3]

• [p]Brake bias adjustments are now allowed in Fixed Setup events.[/p]

[p][/p][h3]Nissan GTP ZXT[/h3]

• [p]Brake bias adjustments are now allowed in Fixed Setup events.[/p]

[p][/p][h3]Pontiac Solstice[/h3]

• [p]During pit stop repairs, all vehicle damage may now be fully repaired.[/p]

[p][/p][h3]VW Jetta TDI Cup[/h3]

• [p]During pit stop repairs, all vehicle damage may now be fully repaired.[/p]

[p][/p][h3]\[Legacy] Dallara IR-05[/h3]

• [p]Brake bias adjustments are now allowed in Fixed Setup events.[/p]

[p][/p][h3]\[Legacy] Riley MkXX Daytona Prototype - 2008[/h3]

• [p]During pit stop repairs, all vehicle damage may now be fully repaired.[/p]

• [p]Brake bias adjustments are now allowed in Fixed Setup events.[/p]

[p][/p]

[h2]2025 Season 4 Patch 3 Hotfix 1 Release Notes \[2025.10.17.01][/h2][p]
[/p][p]This Hotfix Release contains critical fixes as well as some updates for the 2025 Season 4 Patch 3 Release.[/p][p]

[/p][h2]Simulator[/h2][p][/p][h3]User Interface[/h3]

• [p]Fixed an issue where tire options were available for team members that were not available for the crew chief or driver.[/p]

[p]

[/p][h2]Cars[/h2][p][/p][h3]VW Beetle Lite[/h3]

• [p]Fixed a critical issue where this car would fail to load into Sessions.[/p]

[p]
[/p]

[p]This Patch Release contains important updates as well as fixes for issues with the 2025 Season 4 Release.[/p][p]

[/p][h3]Special Demo Drive Note:[/h3]

• [p]During this maintenance period, there will be intermittent connectivity to the Demo Drive launching/setup service for roughly the first 30 minutes of downtime. Customers who enter a Demo Drive Session during this period will be unaffected by the ongoing work. After the Demo Drive work is complete, and our patch deployment process continues as normal, Demo Drive will be fully functional again as usual.[/p]
• [p]Since Demo Drive will not be fully available during this maintenance period, Demo Drive will be left up for 24 hours once maintenance is complete.[/p]

[p]

[/p][h2]Simulator[/h2][p]
[/p][h3]Physics[/h3]

• [p]Track splines are now aware of their relative altitude and may factor this parameter into predictive and estimated calculations related to car types for things such as estimated laptimes, race control gained time yield behavior, penalty balance, and more. This will improve timing functionality not only at a high altitude track, like Mexico, but will also improve a track that has significant altitude variation throughout its run, like Mount Washington.[/p]
• [p]Parameters for vehicle turbo and boost have been adjusted to correspond better with the latest updates for realistic engine operation at altitudes. These changes impact the following vehicles:[/p]
  • [p] GT3[/p]
  • [p] GT4[/p]
  • [p] GTE[/p]
  • [p] Touring Cars (TCR)[/p]

[p]
[/p][h3]Race Control[/h3]

• [p]Fixed an issue where black flags were given for course cuts that were not committed.[/p]

[p]
[/p][h3]AI Racing[/h3]

• [p]AI Drivers have improved their racing skills with the GT4 and GTP class cars to coincide with the  hybrid system updates.[/p]
• [p]AI Drivers have improved their racing line through the Le Mans chicane at Daytona International Speedway.[/p]
• [p]Fixed an issue where AI drivers could not properly navigate the rolling start from pit exit at the Charlotte Motor Speedway (Roval) configurations.[/p]

[p]
[/p][h3]User Interface[/h3]

• [p]Fixed a crash that was occurring due to bad sorting in the Results tab.[/p]
• [p]Fixed an issue where chat macros with '$' appended to them would not trigger.[/p]
• [p]Fixed an issue where "~" would not open text chat on the Session Screen.[/p]
• [p]Fixed an issue where the Last Sector Report would always show the delta from the best lap.[/p]
• [p]Fixed an issue where the interface would not render on screens with over 8K resolution while HDR was active.[/p]
• [p]Fixed an issue where multiple laps could be flagged as your fastest lap. There can be only one.[/p]
• [p]Fixed an issue where locking UI positions with the mouse could cause the cursor to persist on the screen.[/p]
• [p]Fixed an issue where Teams and Drivers could get out of sync when sorting in the Entries tab.[/p]
• [p]Fixed a crash issue that could occur when there are Teams in the session and viewing the Entries List.[/p]
• [p]Fixed a bright flash that could occur between Sessions when viewing the Laps tab.[/p]
• [p]Fixed an issue where the Drive-By-Mouse control interface was not appearing when using any shift aids other than auto shift.[/p]
• [p]For the Options Screen, key-bindings now briefly flash on keypress.[/p]
• [p]Improved the rendering performance of the S Meter.[/p]
• [p]Updated the Results widget on the Session Screen.[/p]
• [p]Fixed bug where certain Admin commands were disabled for drivers when they were out of their car.[/p]
• [p]Fixed an issue where Garage Notes were not being saved correctly.[/p]

[p]

[/p][h2]Cars[/h2][p]
[/p][h3] GTE[/h3]

• [p]Fuel economy has been adjusted.[/p]

[p]
[/p][h3] GTP[/h3]

• [p]For cars using the new hybrid system, adjusted wheel installs to improve water clearing for rear tires and improve the wet weather balance of performance within the class.[/p]
• [p]Power Balance of Performance may now be applied to these cars via the Garage once again.[/p]
• [p]Fixed an issue where some in-car controls were incorrectly adjustable by Crew Chief and Spotter teammates.[/p]
• [p]iRacing setups have been updated.[/p]

[p]
[/p][h3] NASCAR Cup Series Gen 7[/h3]

• [p]iRacing setups have been updated.[/p]

[p]
[/p][h3] Super Formula SF23[/h3]

• [p]Fixed a texture issue with some wheel rims.[/p]

[p]
[/p][h3] TCR Cars (Touring Cars)[/h3]

• [p]Fixed an issue where the material properties for the nose and rear hulls were incorrect which could cause strange visual and particle effects during collisions.[/p]

[p]
[/p][h3]Audi R18[/h3]

• [p]Ambient occlusion mapping has been updated.[/p]

[p]
[/p][h3]Aston Martin Vantage GT3 EVO[/h3]

• [p]Mid-Season BoP Update: Aerodynamic drag has been increased slightly. [/p]
• [p]Improved the engine, backfire, gear, transmission, and ignition sounds, as well as the overall sound dynamics of the audio.[/p]

[p]
[/p][h3]BMW M4 GT3[/h3]

• [p]Fixed an issue with remote cars displaying the incorrect tire compound.[/p]

[p]
[/p][h3]Cadillac CTS-V Racecar[/h3]

• [p]Ambient occlusion mapping for body damage has been updated.[/p]

[p]
[/p][h3]Chevrolet Corvette Z06 GT3.R[/h3]

• [p]Ambient occlusion mapping has been updated.[/p]

[p]
[/p][h3]Dallara P217[/h3]

• [p]Fixed an issue where some in-car controls were incorrectly adjustable by Crew Chief and Spotter teammates.[/p]
• [p]Removed the excessive halo glow from the blue steering wheel shift lamp.[/p]

[p]
[/p][h3]Ferrari 296 Challenge[/h3]

• [p]Reduced the ease and frequency with which the rear wing can be broken off the car from rear-end damage.[/p]

[p]
[/p][h3]Ferrari 499P[/h3]

• [p]The hybrid system's cornering mode has been implemented.[/p]
  • [p]This system will allow the driver to adjust the amount of front hybrid drive they will see in high speed corners, giving them the ability to fine-tune high speed balance.[/p]

[p]
[/p][h3]Hyundai Veloster N TCR[/h3]

• [p]Ride heights related to tires have been updated.[/p]

[p]
[/p][h3]Legends Ford '34 Coupe[/h3]

• [p]Fixed an issue where the steering wheel shaft was not rotating correctly if the steering wheel display was disabled.[/p]

[p]
[/p][h3]Ligier JS P320[/h3]

• [p]SDK/External device-based shift lights should now function as expected with this car.[/p]
• [p]Fixed an issue where some in-car controls were incorrectly adjustable by Crew Chief and Spotter teammates.[/p]
• [p]Ambient occlusion mapping has been updated.[/p]

[p]
[/p][h3]McLaren MP4-30[/h3]

• [p]Engine braking behavior has been restored to a previous version.[/p]

[p]
[/p][h3]Mercedes-AMG W13 E Performance[/h3]

• [p]iRacing setups have been updated.[/p]

[p]
[/p][h3]Porsche 718 Cayman GT4 Clubsport MR[/h3]

• [p]Fixed an issue where some in-car controls were incorrectly adjustable by Crew Chief and Spotter teammates.[/p]

[p]
[/p][h3]Porsche 911 GT3 R (992)[/h3]

• [p]Mid-Season BoP Update: High-speed drag has been reduced slightly.[/p]

[p]
[/p][h3]Porsche 963 GTP[/h3]

• [p]iRacing setups have been updated.[/p]

[p]
[/p][h3]Sprint Car[/h3]

• [p]iRacing setups have been updated.[/p]

[p]

[/p][h2]Tracks[/h2][p]
[/p][h3]Autódromo Hermanos Rodríguez (Mexico City)[/h3]

• [p](Oval) - Fixed an issue where Cautions were not operating correctly.[/p]
• [p]Adjusted distant 3D buildings to only display during Replay mode to help with graphics performance.[/p]

[p]
[/p][h3]Circuito de Jerez - Ángel Nieto[/h3]

• [p]Some floating tire barriers have been grounded.[/p]

[p]
[/p][h3]Daytona International Speedway[/h3]

• [p]Some track-side objects have been adjusted to slightly improve graphics performance.[/p]

[p]
[/p][h3]North Wilkesboro Speedway[/h3]

• [p]Fixed an issue where the pit speed limit would vanish after entering the pits. You are allowed to know the pit speed limit while in the pits.[/p]
• [p]Grammar and spelling on some signs and advertisements has been fixed. This will be the site for the AI Driver's Annual Autumn Spelling Bee, so, everything had to be correct.[/p]

[p]
[/p][h3]Sonoma Raceway[/h3]

• [p](Oval) - Fixed an issue where Cautions were not operating correctly.[/p]

[p]
[/p][h3]Texas Motor Speedway[/h3]

• [p]Fixed an issue where the pit speed limit would vanish after entering the pits. You are allowed to know the pit speed limit while in the pits.[/p]

[p]
[/p][h3]Tsukuba Circuit[/h3]

• [p]Improved the blending of track surface decals with grass textures.[/p]

[p]

[/p]

iRacing's always scared me a bit. Not just because you pay for it with a subscription that I've never felt committed enough to proper online sim racing in one place to sign up for, but because it's serious. No giggling allowed. Obey the track limits, spend hours playing around with damper setups, do not touch my bumper or I'll call three different police forces level of serious. A 42 page-long official sporting code doc for members level of seriously serious.

iRacing Arcade, its new sibling with a Steam Next Fest demo, is thankfully not as serious.

Read more

[p]This Patch contains some updates and fixes for the 2025 Season 4 Release.[/p][p]You can find the Release Notes for this Patch below, or on the iRacing Forums here: 2025 Season 4 Patch 2 Release Notes \[2025.09.24.01] — iRacing Forums[/p][p][/p][p][/p][p][/p][h2]Sim[/h2][h3]AI Racing[/h3]

• [p]The Dallara IL15 is now enabled for AI racing.[/p]

[h3]Audio[/h3]

• [p]Added the latest Italian spotter pack.[/p]

[h3]Graphics[/h3]

• [p]Fixed an issue with AMD FSR where the viewport was not being calculated correctly.[/p]
  • [p]NOTE - While this issue is fixed for non-VR, AMD FSR still is not functioning correctly in VR.[/p]
• [p]For AMD FSR, the new UI is now centered and interacts properly with the mouse when FSR is enabled.[/p]
• [p]Fixed some issues with eye tracking for Pimax.[/p]

[h3]Physics[/h3]

• [p]Updated correction for engine power that will bring power unit outputs more in line with reality at high altitude tracks like Mexico City.[/p]

[h3]Race Servers[/h3]

• [p]Fixed a crash that was occurring when switching from a Practice server to a Race server.[/p]

[h3]User Interface[/h3]

• [p]Fixed an issue where spotting in practice sessions would cause overlapping unreadable buttons to appear in the Session Screen.[/p]
• [p]Fixed the sliders in the Camera Tool to now behave properly when typing values outside of the minimum and maximum constraints, or entering a blank string.[/p]
• [p]Added expand/collapse functionality.[/p]
• [p]Fixed an issue where the wind direction arrow was facing the incorrect direction.[/p]
• [p]Fixed an issue with QuickChat not saving properly.[/p]
• [p]The Garage > 'My Setups' file dialog and Camera file dialog now correctly show the contents of directories when a user has characters outside of their default locale in their file path.[/p]
• [p]Removed the word "Sector" from the Splits display to make it more compact.[/p]
• [p]Fixed an issue where the horizontal scroll for the Results tab would not always appear at the bottom of the window.[/p]
• [p]Fixed the Tire Options black box navigation for the Porsche Mission R. This fix applies to any car with changeable tires but non-adjustable tire pressures.[/p]
• [p]Fixed an issue where the Lap Timing black box included a blank rectangle next to the title.[/p]
• [p]Increased the contrast of the gradient behind the steering wheel icon.[/p]
• [p]Fixed an issue where the 'Configure Now' option would not return users to the calibration wizard.[/p]
• [p]Fixed a crash that was occurring for users in specific Time Zones with specific Regional Formats.[/p]
• [p]Fixed an issue where the Entries tab was sorting Divisions by their first digit.[/p]
• [p]Fixed the dropdown values when exporting Garage setups.[/p]
• [p]For heat races, fixed an issue where the left and right columns in the Event Rules were not aligned.[/p]
• [p]Increased the resolution on the steering lock range slider.[/p]
• [p]Fixed an issue where car numbers in the Results tab were not always aligned.[/p]
• [p]Added an Official/Unofficial flag state next to certain sessions.[/p]
• [p]Fixed an issue with text being cut off in the chat box.[/p]
• [p]Fixed the camera timer overlay so it matches the legacy UI behavior.[/p]
• [p]Fixed an issue where the Shift Horizon setting had values of -0 and +0.[/p]
• [p]Fixed an issue where setups would reset if they had special requirements for fields that would limit options.[/p]
• [p]Added some missing spotter options to the Settings.[/p]

[h2]iRacing[/h2][h3]Paint Kit[/h3]

• [p]Fixed an issue where certain cars had painted tires, windshields, and windows when using specific paints and car patterns.[/p]

[h2]Cars[/h2][h3] GTP[/h3]

• [p]Adjusted the hybrid code to ensure that every GTP and the Ferrari 499P have equivalent hybrid-assisted fuel economy.[/p]

[h3]Acura ARX-06 GTP[/h3]

• [p]Fixed an issue where the Autofuel keybinds and Fuel To End toggle were not working correctly.[/p]
• [p]Fixed an issue where the steering wheel dash did not display the TC1 and TC2 values in the appropriate places.[/p]

[h3]Acura NSX GT3 EVO 22[/h3]

• [p]Fixed an issue with the rain light.[/p]

[h3]Aston Martin Vantage GT3 EVO[/h3]

• [p]Fixed an issue where camber would not be highlighted when causing the tech inspection to fail.[/p]
• [p]Increased the engine torque.[/p]
• [p]iRacing setups have been updated.[/p]

[h3]Aston Martin Vantage GT4[/h3]

• [p]Aligned the shift lights on the digital dash.[/p]

[h3]BMW M Hybrid V8[/h3]

• [p]Renamed TC1 and TC2 to TCLON and TCLAT in order to match the in-car dash display.[/p]
• [p]Fixed an issue where the TC1 and TC2 in-car controls did not map correctly to the TC1 and TC2 settings.[/p]

[h3]Cadillac V-Series.R GTP[/h3]

• [p]Fixed an issue where the Autofuel keybinds and Fuel To End toggle were not working correctly.[/p]
• [p]Fixed an issue where the TC1 and TC2 in-car controls did not map correctly to the TC-A and TC-B settings. TC-A is also correctly labelled in the black boxes and garage now.[/p]

[h3]Dallara IL-15[/h3]

• [p]Raised the yield and break limits for wheels.[/p]
• [p]Increased the meatball flag threshold for wheel damage and improved the pace of wheel repairs.[/p]
• [p][/p]
• [p]NOTE - Terminal wheel damage is still possible.[/p]

[h3]Ferrari 499P[/h3]

• [p]Fixed an issue where the TC1 and TC2 in-car controls did not map correctly to the TC1 and TC2 settings.[/p]

[h3]Ford Mustang GT3[/h3]

• [p]Fixed an issue where the windshield wiper controls were not highlighted in the Options menu.[/p]

[h3]Ford Mustang GT4[/h3]

• [p]Slightly reduced the front rebound damping. iRacing setups have been updated.[/p]

[h3]Lotus 79[/h3]

• [p]iRacing setups have been updated.[/p]

[h3]Mercedes-AMG W12 E Performance[/h3]

• [p]The selected deploy mode should now be accurately reflected by the steering wheel dash and dials.[/p]
• [p]Recharge mode can now be bound to an in-car control: Regen Gain.[/p]

[h3]Mercedes-AMG W13 E Performance[/h3]

• [p]Relocked the engine braking dial to a max of 12 positions.[/p]
• [p]The selected deploy mode should now be accurately reflected by the steering wheel dash and dials.[/p]
• [p]Recharge mode can now be bound to an in-car control: Regen Gain.[/p]

[h3]Porsche 963 GTP[/h3]

• [p]Renamed TC1 and TC2 to TCLO and TCLA in order to match the in-car dash display.[/p]
• [p]Fixed an issue where the TC1 and TC2 in-car controls did not map correctly to the TC1 and TC2 settings.[/p]

[h3]Porsche Mission R[/h3]

• [p]Fixed an issue with the power audio.[/p]
• [p]Fixed an issue with the In-Car Adjustments black box not functioning correctly.[/p]
• [p]Fixed an issue where the dashboard G meters and ABS lights were stuck at 50%.[/p]

[h3]Renault Clio R.S. V[/h3]

• [p]Fixed an issue where the car could fail tech without displaying why.[/p]

[h3]\[Legacy] Porsche 911 GT3 R[/h3]

• [p]Fixed an issue with floating fuel lids appearing in the cockpit view.[/p]

[h2]Tracks[/h2][h3]Autódromo Hermanos Rodríguez (Mexico City)[/h3]

• [p]Added a temporary renderer.ini setting to help resolve an issue where lower shader quality settings showed white paint around the stadium.[/p]
• [p]Added LODs to the scissor lift object.[/p]
• [p]Fixed an issue where the stadium section of the track was missing textures at Medium/Low shader settings.[/p]

[h3]Daytona International Speedway[/h3]

• [p]Adjusted the instanced powerlines.[/p]

[h3]Nürburgring[/h3]

• [p]Updated several adverts around the track.[/p]

[h3]Oulton Park Circuit[/h3]

• [p]Added wraps to the weaved tire bundles.[/p]