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The RX-7 has long been revered for its lightweight design and exceptional handling, making it a favorite among car enthusiasts and tuners. One of the most popular modifications for the RX-7 is the LS swap, which involves replacing the original rotary engine with a powerful LS V8 engine. This article will explore how to achieve over 600 wheel horsepower with a Callaway Stage II build.
Understanding the RX-7 and LS Swap
The Mazda RX-7 is known for its unique rotary engine, which provides a distinct driving experience. However, many enthusiasts have turned to LS swaps for increased power and reliability. The LS engine family, known for its robustness and tuning potential, offers a significant performance upgrade.
Benefits of an LS Swap
- Increased horsepower and torque
- Better aftermarket support and parts availability
- Improved reliability compared to rotary engines
- Wider tuning options for performance enhancements
Choosing the Right LS Engine
When considering an LS swap for the RX-7, selecting the right engine is crucial. The LS1, LS2, and LS3 are popular choices, but for achieving 600+ wheel horsepower, the LS3 or LS7 is recommended due to their higher displacement and performance capabilities.
LS3 vs. LS7
- LS3: 6.2L engine, capable of high horsepower with aftermarket modifications.
- LS7: 7.0L engine, designed for high performance, with a stronger block and forged internals.
Callaway Stage II Build Overview
The Callaway Stage II build is a popular option for those looking to push their LS engine to the limits. This build includes upgraded components that enhance performance, ensuring that your RX-7 can achieve and sustain over 600 wheel horsepower.
Key Components of the Callaway Stage II Build
- High-performance camshaft for increased airflow
- Upgraded cylinder heads for improved combustion
- High-flow fuel injectors to support increased horsepower
- Aftermarket intake manifold for better airflow
- Custom headers and exhaust system for optimal exhaust flow
Installation Process
Installing an LS engine into an RX-7 requires careful planning and execution. Here’s a general overview of the steps involved in the installation process.
Preparation
Before beginning the swap, gather all necessary tools and components. Ensure that the RX-7 is in a suitable workspace and that you have access to a hoist for lifting the engine.
Removing the Original Engine
Carefully disconnect all wiring, hoses, and components connected to the rotary engine. Once everything is detached, lift the original engine out of the engine bay.
Installing the LS Engine
Position the LS engine into the engine bay, ensuring it fits properly with the mounts. Secure the engine in place and reconnect all necessary components, including wiring and hoses.
Tuning for Performance
Once the installation is complete, tuning is essential to achieve the desired horsepower. A professional tune will optimize the engine’s performance, ensuring it runs efficiently and reliably.
Choosing a Tuner
Select a tuner experienced with LS engines and RX-7 builds. They will be able to maximize the performance of your Callaway Stage II build and ensure that it meets your horsepower goals.
Maintaining Your RX-7 LS Swap
After completing the swap and tuning, regular maintenance is crucial to keep your RX-7 running at peak performance. Here are some maintenance tips to consider.
Regular Checks
- Monitor oil levels and quality regularly.
- Inspect the cooling system for leaks or issues.
- Check the fuel system for proper operation.
- Keep an eye on the engine’s performance metrics.
Conclusion
Achieving 600+ wheel horsepower in an RX-7 through an LS swap with a Callaway Stage II build is an exciting journey for any automotive enthusiast. With careful planning, quality components, and professional tuning, your RX-7 can become a powerful machine that stands out on the road.