Boosting Your Rx-7 Ls Swap with Forced Induction: Turbo Vssupercharger Options

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The RX-7 is a beloved sports car known for its lightweight design and agile handling. However, many enthusiasts seek to enhance its performance by swapping the original rotary engine for a more powerful LS engine. While the LS swap significantly boosts horsepower, adding forced induction can take your RX-7’s performance to the next level. In this article, we will explore the options for turbochargers and superchargers, weighing their benefits and considerations.

Understanding Forced Induction

Forced induction involves compressing air entering the engine to increase its density, allowing for more fuel to be burned and thus producing more power. There are two primary types of forced induction systems: turbochargers and superchargers. Each has its own set of advantages and disadvantages that can affect your RX-7’s performance and driving experience.

Turbochargers

Turbochargers use exhaust gases to spin a turbine, which in turn compresses the intake air. This method can significantly increase horsepower and torque, especially at higher RPMs. Here are some key points about turbocharging your RX-7 LS swap:

  • Power Potential: Turbochargers can provide substantial power gains, often exceeding 1000 horsepower with the right setup.
  • Efficiency: Turbos can be more fuel-efficient than superchargers, as they utilize waste energy from the exhaust.
  • Turbo Lag: One downside is turbo lag, the delay between throttle input and boost delivery, which can affect drivability.
  • Complex Installation: Installing a turbo system can be more complex and may require custom fabrication.

When considering a turbo for your RX-7 LS swap, several options stand out:

  • Garrett GT Series: Known for reliability and performance, these turbos are a favorite among enthusiasts.
  • Precision Turbo: Offers a range of turbos suitable for various power levels, making them versatile.
  • Holset HX Series: Popular in diesel applications, these turbos can handle high boost levels and provide excellent performance.

Superchargers

Superchargers are mechanically driven by the engine, providing immediate boost as soon as the throttle is applied. This results in a more linear power delivery compared to turbochargers. Here are some considerations for supercharging your RX-7 LS swap:

  • Instant Power: Superchargers deliver boost almost instantly, eliminating turbo lag and enhancing drivability.
  • Less Complexity: Generally, supercharger installations are less complex than turbo setups, making them easier to fit into the RX-7.
  • Power Limitations: While they provide excellent low-end power, superchargers may not achieve the same peak horsepower levels as turbos.
  • Increased Engine Load: Because they are engine-driven, superchargers can put more load on the engine, potentially affecting fuel economy.

Several supercharger options are well-suited for the RX-7 LS swap:

  • Magnuson Superchargers: Known for their reliability and performance, they offer a range of options for LS engines.
  • Whipple Superchargers: These are popular for their high efficiency and power potential, providing excellent boost.
  • Edelbrock E-Force: A roots-style supercharger that is easy to install and offers great low-end torque.

Choosing Between Turbo and Supercharger

Deciding between a turbocharger and a supercharger for your RX-7 LS swap depends on your specific goals and driving style. Here are some factors to consider:

  • Driving Experience: If you prefer instant throttle response and a linear power band, a supercharger may be the better choice.
  • Performance Goals: For maximum horsepower and performance, especially at high RPMs, a turbocharger might be more suitable.
  • Budget: Consider the overall cost of installation, including any necessary modifications to your engine and drivetrain.
  • Space Constraints: Depending on your setup, one option may fit better in the engine bay than the other.

Conclusion

Boosting your RX-7 LS swap with forced induction can significantly enhance its performance and driving experience. Both turbochargers and superchargers offer unique benefits and challenges. By understanding the differences and considering your personal preferences, you can make an informed decision that aligns with your performance goals. Whether you choose a turbo or supercharger, the right forced induction system will elevate your RX-7 to new heights of performance.