Nacon Racing's News From the Pits brought a lot of new details, but as promised, you can find more questions answered about the physics of the game!

Physics is an important part of any racing game, and it's why we want to be upfront about what experience Endurance Motorsport Series will be offering players upon release. To give you more details on that, here's Jérémie, the physics designer who worked on the physics of the game!

1. Can you introduce yourself to the Endurance Motorsport Series community?

   My name is Jérémie Lolieux, and I work as a physics designer on Endurance Motorsport Series, focusing on vehicle handling, tire behaviour, and how the car interacts with the track and weather conditions. I come from both a game development and sim‑racing background, so my goal is to bridge authentic endurance racing sensations with an experience that remains enjoyable and readable for a wide range of players.​

2. What group of players are the physics aimed for in the Endurance Motorsport Series?

   The physics are aimed at players looking for a sim‑lite experience: something clearly more realistic and demanding than an arcade racer, but not as punishing and demanding as a pure hardcore simulator. Wheel users who enjoy cockpit view and endurance strategy will find enough depth, while gamepad players with driving aids enabled can fully enjoy the driving experience of endurance racing.​

3. What effects are simulated in Endurance Motorsport Series physics?

   The physics simulate key elements of real endurance racing such as tire grip evolution, fuel load impact on handling, suspension behaviour, potential damages or mechanical issues, and aerodynamic downforce at different speeds. Weather changes and track conditions also affect how much grip is available and how stable the car feels over a stint.

4. How much does the physics vary when accounting for tire compounds, weather, and tire wear?

   Different tire compounds offer distinct trade‑offs between peak grip, durability, and warm‑up time, so choosing the right compound for the stint and the weather is a real strategic decision. The soft compound is the most performant one, but it will lose efficiency quicker than medium and hard tyres. The tyre temperature is also important, based on weather conditions and driving style. A soft compound will overheat more easily than a hard one, especially if the track temperature is high.

   As the tires wear and the weather evolves, players will feel progressive changes in braking distances, cornering stability, and traction, encouraging them to adapt driving style and pit strategy rather than dealing with sudden, unpredictable changes. 

5. How do the physics vary between vehicle classes, and the vehicles inside each class? How do you determine the difference between them?

   Each class — Hypercar, LMP2, and GT — is built with different levels of power, weight, downforce, and mechanical grip, so they naturally require different braking points, lines, and race craft to drive effectively. Within a class, vehicles are differentiated by characteristics such as engine layout and power delivery, aero efficiency, and suspension setup ranges, using reference data and category rules so that they feel distinct but remain balanced for multi‑class racing. 

6. Can players expect a greater simulation feel by turning off all assists such as ABS, TCS, etc?

   Yes, turning off assists like ABS and traction control gives a more raw and demanding driving experience, with more direct feedback from the tires and a greater risk‑reward dynamic on braking and corner exit. However, assists are tuned to preserve the underlying physics rather than replace them, so players can progressively reduce aids as they gain confidence without losing the core handling model.

7. What is the gameplay experience that the Endurance Motorsport Series is trying to achieve?

   The game aims to recreate the feeling of being part of a real endurance team, where driving is only one piece of a larger strategic puzzle involving multi‑class traffic, weather management, and pit decisions. By letting players jump between driving and the engineer role, the experience mixes on‑track intensity with tactical, team‑oriented decision making over long races.

8. What was important to the team at KT when developing the physics for the Endurance Motorsport Series?

   The team’s priority was to leverage the KT Engine to deliver believable vehicle behaviour on different tracks and surfaces, while always keeping the experience readable and fun over long stints. Finding the right balance between technical simulation (tires, aero, drivetrain, weather) and accessibility for players with different skill levels and controllers was a core design constraint from the start.

9. What are some tools in the KT Engine that bring the physics to life in Endurance Motorsport Series?

   KT Engine provides an in‑house physics framework that integrates vehicle dynamics, tire models, and surface properties, making it possible to tune each car class precisely for different conditions. On top of that, internal debug tools such as telemetry views, and live parameter tweaking help iterate quickly on handling, making sure what designers feel on track matches the intended behaviour.

   

10. What was your favourite part about developing the physics for Endurance Motorsport Series?

    The most satisfying part was shaping the flow of an endurance stint: feeling the car evolve as the fuel burns off, tires wear, and weather changes, and then seeing how players respond with their own strategies and driving styles. Bringing together multi‑class traffic, long‑run tire management, and the engineer role into a cohesive, race‑long experience is where the physics really came alive for the project.

Weather conditions play a critical role in race strategy, especially in Endurance Motorsport Series, where you can run several cars from different classes in a single race. Porsche joins the lineup with the Porsche 963 in the Hypercar class and the Porsche 911 GT3 R in the GT3 category. And that's not all: the legendary Spa-Francorchamps with its unpredictable weather and its mythic layout is part of the Endurance Motorsport Series game!

As a race engineer, your job is to develop the smartest possible strategy to outpace the competition. In addition to tools like Driving Style Management, monitoring the weather radar is absolutely essential for success.

Reading the weather correctly could make or break your race. A dedicated weather radar is available from the pit wall, offering crucial data such as nearby cloud formations (color-coded by rain intensity), wind speed, and wind direction. With this information in hand, you can decide exactly when to call your drivers in the pits for tire changes.

Beyond slicks, which are only effective on a dry track, the game includes Intermediate and Wet tires, designed for rainy conditions. Intermediate tires are ideal for light rain, while Wet tires shine in heavy rain and more treacherous conditions. Track humidity constantly shifts with the weather and it can vary from corner to corner, especially on long circuits like Spa-Francorchamps.

From the driver’s perspective, the radar isn't visible. That information is exclusive to the race engineer from the pit wall. Making the right tire calls at just the right moment is essential to climbing the leaderboard.

Porsche’s history is deeply tied to endurance racing. With 19 wins at the 24 Hours of Le Mans, 12 at the 12 Hours of Sebring, and 20 at the Daytona 24 Hours, Porsche stands as the most successful manufacturer in endurance racing history. Both the Porsche 963 and Porsche 911 GT3 R are part of the Endurance Motorsport Series.

The Porsche 963 debuted in 2023 under the new Hypercar regulations. Its name is a nod to the legendary Porsche 956 and 962 models that dominated sports car racing in the 1980s. It succeeds the Porsche 919 Hybrid, which won the 24 Hours of Le Mans and the FIA World Endurance Championship in 2015, 2016, and 2017.

In 2024, the Porsche 963 cars secured both the Hypercar World Endurance Drivers’ Championship and the IMSA GTP Drivers’ Championship, including a major win at the 24 Hours of Daytona.

GT racing is also part of the Porsche’s DNA. The Porsche 911 GT3 R (992), also introduced in 2023, is the brand's latest evolution in the GT3 class. It proved its strength with a 1-2 finish in the LMGT3 category of the 2024 World Endurance Championship, and an impressive victory at the Bathurst 12 Hour the same year.

Spa-Francorchamps is one of the most iconic racetracks in the world. Located in the Ardennes Forest, in eastern Belgium, it’s a favorite among drivers thanks to its 7.004 km layout and legendary corners like Eau Rouge, Raidillon, and Pouhon.

With over 100 years of history, Spa’s legacy is tightly woven into the fabric of endurance racing. The first Spa 24 Hours was held in 1924 on a massive 15-kilometer layout. In 1953, Spa was part of the inaugural World Sportscar Championship.

Starting in 1966, two major endurance races were held at Spa: the Spa 24 Hours for touring cars, and the Spa 1000 km for sports prototypes. The circuit was shortened from 14 to 7 km in 1979 and has since been modernized several times. Today, it still hosts two premier endurance events:

• The Spa 24 Hours (with 8 Porsche wins) is known as the hardest GT3 race in the world.

• The 6 Hours of Spa-Francorchamps (with 10 Porsche wins) is a regular venue of the FIA World Endurance Championship.

Spa is also famous for its unpredictable weather. Many races have seen everything from sun and light showers to heavy rain, fog, and even snow, like during the 2019 edition of the 6 Hours of Spa. If you want to succeed in your Endurance Motorsport Series races at Spa, mastering the weather will be absolutely crucial.

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