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2021 season 1 patch 4 update for iRacing

A minor update to the iRacing simulation is coming tomorrow. This marks the 4th update to season 1 of the 2021 season (which confusingly started in December 2020). Patch 3 was fairly minor as well, featuring mainly BOP and setup adjustments for cars.

Notable changes include:

  • Further BOP updates – Mercedes-AMG GT3 and Ferrari 488 GTE
  • NASCAR Cup cars – new parameters for low downforce packages at Daytona
  • NASCAR Trucks – reduction in drafting strength

The patch will be going live tomorrow.

You can read all of the notes from the developers below or read the whole post on iRacing’s forums (requires an iRacing account.)

Changelog / Patch Notes (season 1, patch 4)

iRACING UI: (5.06.01)

3D Model Viewer

– Fixed an issue with the NASCAR Gander Outdoors Chevrolet Silverado not showing a custom spec map correctly.

SIMULATION:

Replay

– The Replay playback state will now be left alone when a user remains connected to the race server until the session finishes, and the server disconnects from the user.
– – A new variable, “leavePlaybackAloneAtSessionEnd” has been added to the [Replay] section of the “app.ini” file. Changing this value to 1 from the default (0) will cause the playback state to also be left alone between Session transitions (like going from Qualify to Race).

CARS:

Audi 90 GTO

– Fixed an issue where backfires from this vehicle were not appearing at the appropriate location, and were looking distorted.

Dallara P217

– Aerodynamic coefficients have been removed from the garage.

– Power steering assist, steering ratio, and the display page have been added back to the garage after they had been inadvertently removed.

Dallara IR18

– The iRacing setups for World Wide Technology Raceway – Oval and Pocono Raceway have been updated.

Ferrari 488 GTE

– 2021 Season 1 GTE BoP Adjustment: Aerodynamic downforce has been increased slightly.

Mercedes-AMG GT3

– 2021 Season 1 GT3 BoP Adjustment: Engine power over entire rev range has been increased slightly.

NASCAR Cup Series Chevrolet Camaro ZL1

– Vehicle parameters have been adjusted for using the low downforce package while running at Daytona International Speedway – Road Course and NASCAR Road Course.
– – Downforce has been reduced, and engine cooling has been increased.

NASCAR Cup Series Ford Mustang

– Vehicle parameters have been adjusted for using the low downforce package while running at Daytona International Speedway – Road Course and NASCAR Road Course.
– – Downforce has been reduced, and engine cooling has been increased.

NASCAR Cup Series Toyota Camry

– Vehicle parameters have been adjusted for using the low downforce package while running at Daytona International Speedway – Road Course and NASCAR Road Course.
– – Downforce has been reduced, and engine cooling has been increased.

NASCAR Gander Outdoors Chevrolet Silverado

– Drafting strength has been reduced.

NASCAR Gander Outdoors Ford F150

– Drafting strength has been reduced.

NASCAR Gander Outdoors Toyota Tundra

– Drafting strength has been reduced.

Porsche 919

– Rollbar camera view has been adjusted slightly.

Silver Crown

– Rear ride heights for opponent cars have been adjusted to improve their look and handling at high banked ovals.

TRACKS:

Mount Panorama Circuit

– Driving line guide has been updated.

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