新型Roadster　その２　進化の肝

Summary

This video script dives into an in-depth review of the Roadster, focusing on its handling and performance enhancements. The narrator shares their experience driving the vehicle, highlighting significant improvements due to the introduction of a new asymmetrical LSD (Limited Slip Differential) and adjustments in steering and suspension systems. They discuss the impact of these upgrades on both low and high-speed stability, emphasizing the balance between agility and control. The script also covers the evolution of the Roadster's design, including interior and exterior modifications, and touches on the choice of engine sounds and color options, showcasing the meticulous attention to detail in creating a more refined driving experience.

Takeaways

• 🚗 The Roadster's driving experience significantly differs due to its unique mechanical setup.
• 🔬 The vehicle lacks the newer type of asymmetric LSD (Limited Slip Differential), instead using a simple open differential, impacting handling dynamics.
• 💻 Upgrades to the steering system and differential greatly influence the vehicle's performance, demonstrating the importance of these components in vehicle dynamics.
• 🔥 The introduction of a new asymmetric LSD enhances traction and stability across all speed ranges by effectively utilizing the operation limiting force.
• 🔧 Innovative changes to the LSD include splitting the side gear into two parts and adding a structure inside for better control over acceleration and deceleration.
• 💡 Adjustments to the initial torque setup, transitioning from coil springs to a saber mechanism, result in a more stable and consistent handling experience.
• 🔍 The vehicle's handling is notably improved, even without LSD, suggesting significant advancements in steering and suspension tuning.
• 💬 Engine sound quality is enhanced, not through sound enhancers, but by allowing more engine noise into the cabin, contributing to a satisfying driving experience.
• 💫 A new light grey color option is introduced, aimed at complementing the Roadster's design while matching with other compact Mazda models.
• 📚 The Roadster continues to evolve, with a focus on handling and dynamics, indicating Mazda's commitment to enhancing the driving experience through technological advancements.

Q & A

What is unique about the differential system mentioned in the transcript?

The differential system discussed features an asymmetric LSD (Limited Slip Differential) that is a new type, which does not have the S-type attached. This system employs an open diff setup, highlighting how differential power and steering system changes impact performance, despite no changes to dampers or the car body.

How does the asymmetric LSD improve the car's handling?

The asymmetric LSD improves handling by using a mechanism that varies the thrust force on the acceleration and deceleration sides, enabling different levels of force application. This results in more stable initial effects and a tuning that is effective across various speed ranges, enhancing stability and reducing understeer.

What changes were made to the LSD in the new development?

In the new LSD development, the side gear component was split into two parts, and a structure was added in the middle to manage the thrust force more effectively. This adjustment allows for a difference in applied force during acceleration and deceleration, offering better control and stability.

How does the transcript describe the impact of suspension settings on the car's performance?

The transcript indicates that while maintaining a pleasant feel at low speeds, the car's suspension must address instability at high speeds without compromising low-speed comfort. It suggests that without a firm roll suppression at low speeds, high-speed instability cannot be effectively managed.

What role does steering system changes play in the car's handling according to the transcript?

Steering system changes are significant in the car's handling improvements. The adjustments made to reduce friction and enhance control contribute to a more natural connection from power-off to power-on states, making handling more intuitive and responsive.

What was a key challenge in developing the car's steering and handling features?

A key challenge was balancing the reduction of steering gear system friction with the need to prevent vibration and maintain control, particularly in modern cars where steering friction and shim adjustments are crucial for quality and feel, especially for the North American market.

How did changes in computer control systems affect the car's performance?

Upgrades to the computer control systems allowed for more precise control, improving throttle response off acceleration and enhancing engine smoothness. These changes contributed to a better overall driving experience and improved engine sound.

Why is the color choice significant for the car mentioned in the transcript?

The color choice, light grey, was selected to match the car's significant updates in both exterior and interior design, aiming to complement the modern and sleek look of the compact car while maintaining a sporty appearance that fits well with the Roadster's character.

What does the transcript reveal about the future of the Roadster?

The transcript suggests that significant investments in the platform and overall design indicate a commitment to continuing the Roadster's legacy, hinting at future developments and enhancements to cater to a wide range of customers and driving experiences.

What feedback from owners led to considerations for future updates?

Owner feedback, especially from those using their cars on circuits during weekends, highlighted the need for options like the NRA setting, which was not included in the latest model. This feedback will be considered for future updates to enhance the car's track performance and usability.