Update 1.6.0.1 for Project Motor Racing is now rolling out across all platforms, delivering one of the simulator’s most consequential revisions since launch. Rather than introducing new content, this patch focuses on refining core driving dynamics—most notably through a substantial overhaul of the GT3 tyre model—while also addressing stability, Force Feedback consistency, and multiple systemic issues reported by the community.
A Tyre Model Revision Aimed at the Limit
The headline change in v1.6.0.1 is a significant evolution of GT3 tyre behavior. Since the title’s late-2025 debut, players had frequently cited inconsistencies in grip transitions, vague feedback at the limit, and unpredictable slide characteristics. Straight4 Studios positions this update as a structural physics revision designed to improve how GT3 cars communicate load, slip, and traction loss.
According to the studio, the revised model delivers:
- More accurate slip and grip angles, improving how the car behaves as it approaches and exceeds peak adhesion.
- Clearer feedback at the limit, particularly through steering response and Force Feedback cues.
- More natural grip-to-slide transitions, reducing the sense of abrupt breakaway.
In practical terms, drivers should notice a more progressive build-up of front-end load, paired with rear-end traction loss that develops in a more readable and recoverable manner. Slides remain part of the driving experience but are described as more intuitive to anticipate and correct.
Braking Stability and Electronic Aids
Trail braking—long a sensitive area in many simulators—has been another focal point. Under braking, especially when combining steering input into slower corners, GT3 cars are expected to feel more settled. ABS intervention is still present, but its behavior has been tuned to be less disruptive when managing lateral load.
Traction Control logic has also been reworked to better complement the new tyre dynamics. The electronics now aim to allow more natural lateral slip while curbing excessive longitudinal slip, enabling drivers to apply throttle more confidently on corner exit before intervention becomes noticeable.
Setups May Require Rework
As with previous physics updates, Straight4 Studios cautions that existing custom setups for GT3 cars may no longer behave as intended. Changes to tyre characteristics and load sensitivity inevitably alter vehicle balance, meaning pre-update configurations will likely need revision to align with the new handling baseline.
For competitive players and league organizers, this is a non-trivial adjustment. Even subtle tyre model changes can significantly influence braking points, rotation behavior, and tyre management strategies over race stints.
Cross-Class Physics and Handling Changes
While GT3 revisions dominate the update, v1.6.0.1 introduces several broader physics and drivability adjustments:
- Implementation of a more robust throttle response system.
- Revised Downshift Protection, featuring simplified logic and a percentage allowance for over-rev conditions to reduce unnecessary restrictions.
- Fixes for automatic gear behavior and throttle blip assist, improving stability during downshifts.
- Lowered tyre pre-heating temperatures across all classes.
Additional category-specific changes include a full TC rework for LMDh vehicles, relaxed TC settings in GTO for greater driver influence, and slip angle adjustments in historic Group 5 and Group C machinery.
Force Feedback and Input Refinements
Force Feedback consistency and hardware behavior receive targeted improvements in this patch:
- FFB strength balanced across the GT3 class, establishing a more uniform baseline feel.
- Improved FFB response in wet conditions, an area where users had reported inconsistent cues.
- Logitech TrueForce disabled by default on PC, likely as a precaution for compatibility and tuning stability.
- Resolved an issue affecting setup selection via mouse input when large numbers of configurations were present.
These changes aim to reduce variability between cars and provide more predictable steering feedback, a critical factor for sim racers relying on nuanced FFB signals.
Stability, Multiplayer, and AI Updates
Beyond physics, Straight4 Studios continues to address technical and gameplay stability:
- Fixed a bug causing opponent cars to ghost unexpectedly during online races.
- Corrected an issue that could place players in an unintended lobby.
- Increased AI grid capacity at São Paulo to support up to 32 opponents on PC.
- Improved AI racing line behavior across multiple circuits.
Collectively, these adjustments suggest an ongoing effort to stabilize both offline and online race experiences, particularly in higher-density scenarios.
Visual, UI, and Telemetry Fixes
Update 1.6.0.1 also incorporates various visual optimizations and interface corrections:
- Optimized tree rendering and placement for improved performance.
- Adjusted track penalty trigger zones for more consistent detection.
- Fixed incorrect constant data being transmitted via UDP telemetry.
- Corrected flickering issues on MoTeC displays, which now receive accurate tyre temperature data.
- Multiple small vehicle art fixes and polished driver animations.
While less visible than tyre physics changes, these refinements contribute to overall presentation quality and data reliability for telemetry-focused users.
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- Project Motor Racing
- Project Motor Racing Year 1 Bundle
- Project Motor Racing Group 5 Revival Pack
- Project Motor Racing GTE Decade Pack
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