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The Mazda RX-8 is a unique sports car that has garnered a dedicated following due to its rotary engine and lightweight design. However, for those looking to push the performance envelope, especially with an LS engine swap, supporting modifications become crucial. This article will explore the essential supporting mods for achieving a reliable 550 horsepower in an RX-8 LS build, focusing on the reinforced differential, upgraded transmission, and high-flow fuel system.
Reinforced Differential
The differential is a critical component in any high-performance build. For a 550 hp RX-8 LS, the stock differential may not withstand the increased power and torque. Upgrading to a reinforced differential is essential for ensuring reliability and performance.
- Type of Differential: Consider a limited-slip differential (LSD) for better traction and handling.
- Gear Ratio: Choose a gear ratio that complements your engine’s power band for optimal acceleration.
- Material: Look for a differential made from high-strength materials to withstand the added stress.
- Installation: Professional installation is recommended to ensure proper setup and alignment.
Popular Differential Options
- Ford 8.8″ Differential
- GM 10-bolt Differential
- Custom Fabricated Options
Each of these options has its pros and cons, so it’s essential to research and choose one that fits your specific performance goals.
Upgraded Transmission
The transmission plays a vital role in transferring power from the engine to the wheels. An upgraded transmission is necessary to handle the increased horsepower and torque of a 550 hp LS engine.
- Transmission Type: Consider a T56 or a TH400 automatic transmission for robust performance.
- Clutch Setup: A heavy-duty clutch will ensure reliable engagement and withstand high power levels.
- Shifter: An aftermarket short-throw shifter can improve gear changes and driving experience.
- Cooling System: An upgraded transmission cooler can help maintain optimal operating temperatures.
Transmission Recommendations
- T56 Magnum 6-speed manual
- TH400 3-speed automatic
- Built 4L80E for automatic performance
Choosing the right transmission will depend on your driving style and whether you prefer manual or automatic shifting.
High-Flow Fuel System
To support a 550 hp output, the fuel system must be upgraded to ensure adequate fuel delivery. A high-flow fuel system is crucial for maintaining engine performance and preventing lean conditions.
- Fuel Pump: Upgrade to a high-capacity fuel pump capable of delivering the required flow rate.
- Fuel Injectors: Consider larger fuel injectors to match the increased fuel demand.
- Fuel Lines: Use high-performance fuel lines that can handle higher pressures.
- Fuel Pressure Regulator: An adjustable regulator can help maintain optimal fuel pressure.
Fuel System Components
- Walbro 450 LPH Fuel Pump
- Injector Dynamics 1000cc Fuel Injectors
- AN -6 Fuel Lines
These components are essential for ensuring your RX-8 can handle the demands of a high-performance LS engine.
Conclusion
Supporting modifications are crucial for achieving a reliable and powerful 550 hp RX-8 LS build. By investing in a reinforced differential, upgraded transmission, and high-flow fuel system, you can ensure that your vehicle performs at its best while handling the increased power. Each component plays a vital role in the overall performance and reliability of your build, making it essential to choose quality parts and professional installation.