Steam 社区 :: Project Motor Racing

Project Motor Racing — Update 2.0.0.2

4 月 10 日

Update 2.0.0.2 primarily focuses on general stability and performance improvements, alongside a rework and rebalance of AI opponents.

In addition, this patch continues the evolution of the throttle response model introduced in the previous update, now expanded to more car classes.

Be sure to read our deep-dive blog on this system.

Continue reading for the full patch notes.

Physics & Handling

Custom setups from the ModHub now load gear ratios correctly.
New and improved throttle response has been implemented across multiple cars.
Below is a detailed list of changes made to both the physics and handling related components.

Mazda MX-5 Trophy

Upgraded AI opponents' behaviour for this class.
Improved AI opponents’ physics for this class.
Rebalanced AI opponents’ performance for this class.
Fixed a typo in the setup menu.

Porsche 992 Trophy

Improved throttle response.
Taller default final drive gear ratio based on community feedback.
New default setup.

N-GT

Improved throttle response.

AUS-v8 — Ford Falcon V8

Upgraded AI opponents' behaviour for this class.
Improved AI opponents’ performance to match the changes made to player car.
Rebalanced performance to more closely match real world data.
Improved throttle response.

GT3

Upgraded AI opponents' behaviour for this class.
Improved AI opponents’ physics for this class.
Rebalanced AI opponents’ performance for this class.

Art – Vehicles

Several vehicles have received multiple visual improvements, along with minor fixes to visual effects.
Below is a detailed list of changes made to vehicle art-related components.

BMW M3 GTR (E46)

Fixed an issue with wheel blur visual effect.
Adjusted driver hand positions and animations.

BMW M4 GT3 (G82) EVO

Improved lighting textures.
Fixed an issue with wheel blur visual effect.
Improved Ambient Occlusion (AO) effects.

BMW M4 GT4 EVO (G82)

Improved lighting textures.
Fixed an issue with wheel blur visual effect.
Improved Ambient Occlusion (AO) effects.

Lamborghini Murciélago R-GT

Fixed an issue with the wheel blur visual effect.

Nissan Motul Autech GT-R GT500

Updated livery design.
Updated thumbnail for UI purposes.

Nissan Z GT4

Improved lighting textures.
Fixed an issue with wheel blur visual effect.
Improved Ambient Occlusion (AO) effects.

Panoz LMP-1 Roadster S

Enhanced lighting textures.
Fixed an issue with wheel blur visual effect.
Improved Ambient Occlusion (AO) effects.

Porsche 718 Cayman GT4 Clubsport

Enhanced lighting textures.
Fixed an issue with wheel blur visual effect.
Improved Ambient Occlusion (AO) effects.

Art - Environment

Improved rain visual effects.
Daytona International Speedway: improved stability and performance.
Takimiya Circuit: improved stability and performance.
Northampton: fixed an issue where the pit crew would not spawn if the player drove in too wide into the pit lane.

AI Opponents

Rebalanced speed and pace.
Improved high-speed cornering prediction to reduce instances of AI opponents appearing to brake at random points.
Implemented more lenient speeds in the pit lane on all circuits.
Derby GP: reworked racing lines.
San Marino: improved racing lines.
Brianza: improved racing lines.
Kyalami Grand Prix Circuit: fixed AI opponents pit entry/exit behaviour.
Daytona International Speedway: reworked racing and pit lines.
Adjusted fuel safety margins and increased randomised fuel levels (60%–100%) in situations where there is not enough capacity to reach the end of the race.
Improved pit strategy for changing weather conditions, allowing AI opponents to pit for tyres as track wetness evolves.
Increased the brake damage threshold for disc changes from 30% to 90%.
Fixed a bug that caused AI opponents not to replace damaged brakes, leading to constant pitting.
Disabled collisions after the player finishes a race event.
Improved behaviour under blue flag conditions.

FFB & Input

Changed default FFB Gain from 0.8 to 0.7 to prevent signal clipping.
Fixed an issue where loading files would overwrite Force Feedback (FFB) detail/boost value.

Career Mode

Fixed a minor visual bug affecting the display of Career Mode trophy images.

Gameplay & UI

Fixed issues with German and Russian localisation.
Fixed an issue with the car setup menu on hybrid cars that could cause the game to crash.
Corrected UDP telemetry data for sector times and best sectors.
Opponents in the pits no longer appear in the Radar System.
Updated emblem for "964 Trophy" class.

Gameplay – Consoles

The values in the “Master Volume” option in the settings menu now apply to the intro cinematics.
Fixed an issue with the “Reset All” option in the settings menu that prevented settings from resetting.

Online

Further stability and performance improvements.
Fixed an issue that could cause a crash during transitions or when leaving while browsing the Custom Lobby menu.
Custom Lobby hosts can now change the maximum player count after creating the lobby.
Lobbies with an in-progress session, or those already at maximum player count, are now shown by default while browsing the Custom Lobby menu.
Fixed an issue that could potentially cause a crash during the transition between race sessions.

Thank you for your support. We hope you continue to enjoy Project Motor Racing.

Project Motor Racing

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Demo?

Any demo version on STEAM? Please?

3

Gepards

17 小时前

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Deep dive: Throttle Response Model

4 月 10 日

First introduced with Update 2.0 on selected car classes, and then further expanded with Update 2.0.0.2, Project Motor Racing took a significant step forward in how throttle response and engine behaviour are simulated. This isn’t just a technical improvement; it’s a fundamental shift in how the car communicates with the driver.

From Input to Output: A More Realistic Model

To achieve this, we analysed real-world data measuring how engines produce torque and power relative to throttle input. From that, we developed an approximation model that closely matches these behaviours across the full RPM range.

Real Engines Are Not Linear

Real engines are inherently non-linear. At partial throttle, power delivery does not scale directly with input, and this behaviour changes depending on RPM. Previously, engines could continue to rev towards redline even under light throttle — something that does not reflect real-world behaviour.

Real-world throttle vs power curve—note the non-linear relationship between input and output.

What’s Changed in Update 2.0

The updated system introduces a more accurate mapping between throttle input and torque output. This allows for sharper response at lower RPM and a more progressive, controlled delivery as revs rise.

Old throttle response. Our old system gave something like this when tested at around 60% rpm.

New throttle response: changes with starting RPM.

With update 2.0, we got more like this. You can see that 50% throttle output already gives you over 70% of the power you're going to get at that specific rpm. At higher RPM it gets somewhat more towards linear, but overall, you tend to get more percentage of power than percentage of throttle still. This all means that as you step on the throttle, you get power earlier, sharper, through the travel.

Bringing Engine Character to Life

This system moves beyond a one-size-fits-all model. Each engine can now express its own mechanical identity, from the lazy throttle behaviour of the BMW 320 Turbo Group 5 small inline 4 engine with a turbo bigger than a house, to the instant reactions of the naturally aspirated rotary engine of the Mazda RX-7 GTO and the modern delivery of a car in the GT500 EVO class.

Turbo response example: How torque and power grow as the turbo spools up, compared to steady state.

Throttle response example: how power builds progressively with throttle input.

This graph shows how throttle response changes with starting RPM. The orange line is at 2500 rpm, and you can see that 25% throttle already gives almost 60% of the total power available at that low RPM. At higher RPM, the behaviour trends somewhat closer to linear, but overall, the engine still tends to deliver a greater percentage of power than the percentage of throttle input. In practice, this means that when you step on the throttle, power arrives earlier and more sharply through the pedal travel. The high RPM results go below the 0% power line because of curve smoothing on the graph but also tell you that you'd be getting engine braking at low throttle and high rpm.

What You’ll Feel On Track

On track, this translates into stronger response at lower RPM, a more intuitive connection between throttle and acceleration, and greater control when managing traction. It becomes easier to balance the car, particularly on corner exit.

Try It Yourself

Even when stationary, the difference is clear. Rev the engine and notice how quickly it responds and how precisely you can now hold a specific RPM. That same control carries directly into driving situations.

The following classes now have this new throttle response model implemented in all their respective cars.

Group C
GTO
GROUP 5
GT500
GT500 EVO
N-GT
Porsche 992 Trophy
AUS-V8 — Ford Falcon V8

Future updates will bring this throttle response model into other cars.

Foundation for the Future

This new throttle model is part of a broader effort in Update 2.0 to improve clarity and communication between car and driver. As we continue refining each class, this system allows us to better express the unique behaviour of every vehicle.

This is the beginning of a more expressive simulation, where every car doesn’t just perform differently but feels different.

Project Motor Racing

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深入了解 Update 2.0

3 月 28 日

每个赛车赛季都会有一个时刻，赛道重新排位，总结经验，并开启新的阶段。

对于 Straight4 Studios 来说，Update 2.0 正是 Project Motor Racing 的这一重要时刻。

自发布以来，团队与社区一起花费了数月时间不断打磨体验。玩家反馈、内部测试以及大量迭代共同塑造了通往 Update 2.0 的道路。此次更新是一个重要的里程碑，几乎涉及模拟器的每一个层面——视觉表现、驾驶手感、在线功能以及玩家的职业生涯进程。

简而言之，此次更新为 Project Motor Racing 未来的发展奠定了全新的基础。

In short, this update sets a new baseline for Project Motor Racing moving forward.

部分亮点包括：

更清晰、更快速的用户界面（UI）
在线模式的反作弊系统
重制的生涯模式
优化的驾驶物理
多个车辆类别的全新轮胎模型
全新的 HUD 工具：ECU Widget
改进的画面表现和性能

接下来是什么

Update 2.0 标志着 Project Motor Racing 的一个重要里程碑，但这绝不是终点。

未来，我们的重点保持不变：继续与社区共同开发模拟器，并在每次更新中不断提升体验。同时，我们也在持续将玩家高度期待的内容加入游戏——我们始终倾听并记录社区的反馈。

感谢所有一路以来参与这段旅程的玩家——是你们引导我们变得更好。

对于那些正在寻找合适时机加入赛道的玩家来说，Update 2.0 是一个绝佳的起点。

想快速了解，请观看我们的 Update 2.0 发布预告片。

完整内容请阅读更新说明。

赛道上见。

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