Rx-8 Ls Swap: Achieving 600+ Hp with a Gm Ls3 and Edelbrock Supercharger

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The RX-8 is a unique sports car known for its lightweight design and rotary engine. However, many enthusiasts have turned to LS swaps to enhance performance. In this article, we will explore how to achieve over 600 horsepower using a GM LS3 engine paired with an Edelbrock supercharger.

Understanding the RX-8 and LS Swap Benefits

The Mazda RX-8, with its rotary engine, offers a different driving experience compared to traditional piston engines. However, the LS swap provides significant advantages:

  • Increased horsepower and torque.
  • Better aftermarket support and availability of parts.
  • Improved reliability and longevity.
  • Enhanced tuning capabilities.

Choosing the Right Components

To successfully swap an LS3 into the RX-8, careful selection of components is crucial. Here are the key components needed for the swap:

  • GM LS3 engine.
  • Edelbrock supercharger kit.
  • Custom engine mounts.
  • Upgraded fuel system.
  • ECU tuning and wiring harness.

Engine Installation Process

Installing the LS3 engine into the RX-8 requires meticulous planning and execution. Here’s a step-by-step guide:

  • Remove the existing rotary engine and components.
  • Install custom engine mounts for the LS3.
  • Fit the LS3 engine into the engine bay.
  • Connect the transmission to the LS3.
  • Install the Edelbrock supercharger on the LS3.

Upgrading the Fuel System

To support the increased power from the LS3 and supercharger, upgrading the fuel system is essential. Consider the following:

  • Install high-flow fuel injectors.
  • Upgrade the fuel pump to handle higher pressure.
  • Use larger fuel lines for better flow.
  • Consider a fuel pressure regulator to maintain optimal pressure.

Wiring and ECU Tuning

The LS3 engine requires a compatible ECU to function correctly. Wiring and tuning are critical steps:

  • Use a standalone ECU or reprogram the factory ECU.
  • Ensure all sensors are connected properly.
  • Tune the ECU for optimal performance with the supercharger.
  • Test and adjust the air-fuel mixture for best results.

Performance Testing and Tuning

After installation, it’s crucial to test the vehicle’s performance. Here are the steps to ensure everything is functioning as intended:

  • Perform a baseline dyno run to measure horsepower and torque.
  • Monitor engine temperatures and adjust cooling if necessary.
  • Check for any leaks in the fuel or cooling systems.
  • Make adjustments to the ECU tuning based on performance data.

Conclusion

Swapping an LS3 engine into an RX-8 and adding an Edelbrock supercharger can yield impressive results, pushing horsepower beyond 600. With the right components and careful installation, this project can transform the RX-8 into a powerhouse on the road.