Product information
*Even for the same vehicle model, installation may not be possible depending on the grade and year. Additionally, separate parts may be required for installation. For detailed compatibility information, please be sure to check the following:HerePlease check further.
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This RX-8-specific flywheel features a moderately reduced weight compared to mass-produced models, lowering the moment of inertia by approximately 28%. It minimizes impact on handling while improving engine response. Concerns about reduced durability due to weight reduction are addressed by using a fully machined chrome-molybdenum steel material with excellent thermal stability.>>Learn more
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Reducing the moment of inertia contributes to improved responsiveness.
The flywheel is a component that absorbs torque fluctuations generated during the engine's operation and stabilizes its rotation. It is mounted at the rear end of the engine's crankshaft (or eccentric shaft in the case of a rotary engine). In lightweight flywheels used for tuning, weight (mass) is generally used as an indicator of performance, but the magnitude of the moment of inertia—whether the mass distribution is concentrated at the center of rotation or on the outer circumference—is key to the engine's characteristics.
The moment of inertia is like a coefficient that determines how easily a part rotates. A smaller moment of inertia improves responsiveness, but it can lead to disadvantages such as stalling, insufficient torque at low RPMs, and increased vibration. Conversely, a larger moment of inertia makes rotation smoother, but it worsens responsiveness. Therefore, finding the right balance is difficult. In mass-produced cars, a larger moment of inertia is unavoidable due to considerations of ease of handling and comfort, but there is room for improvement if the focus is on drivers who seek a sense of unity with their car.
Our "Sports Flywheel" reduces the moment of inertia by 28-37% compared to mass-produced models (for reciprocating engines). It's designed to provide agile throttle response and stress-free operation that perfectly matches the sensibilities of drivers enjoying street driving. It uses chromium-molybdenum steel, a material with excellent thermal stability. Ideally, we recommend installing it simultaneously with a clutch line to enhance the direct feel during clutch operation.