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The Mazda Miata, known for its lightweight design and superb handling, has become a favorite among car enthusiasts. However, some owners seek to enhance its performance further. One popular modification is the RX7 turbo swap, which can significantly boost the power of the NA Miata. In this article, we will explore the real-world results of a 200 HP NA Miata build with an RX7 turbo swap and the performance benefits it brings.
Understanding the NA Miata
The NA Miata, produced from 1989 to 1997, features a lightweight chassis and a rev-happy 1.6L or 1.8L engine. Its simplicity and balance make it an ideal platform for modifications. However, stock power levels can leave some enthusiasts wanting more. This is where the RX7 turbo swap comes into play.
The RX7 Turbo Swap Explained
The RX7, particularly the second-generation models, is equipped with a 1.3L rotary engine that produces impressive power. By swapping this engine into the NA Miata, owners can achieve a significant increase in horsepower and torque. The process involves various modifications, including engine mounts, wiring, and exhaust systems.
Key Components of the Swap
- Engine: RX7 1.3L rotary engine
- Transmission: Compatible RX7 transmission or Miata transmission with modifications
- ECU: RX7 ECU for optimal performance
- Exhaust: Custom exhaust system to accommodate the rotary engine
- Cooling: Upgraded radiator and intercooler
Performance Benefits of the RX7 Turbo Swap
Swapping an RX7 turbo engine into an NA Miata can yield several performance benefits. The most notable is the increase in horsepower, which can easily reach 200 HP or more, depending on the setup.
Increased Horsepower and Torque
The RX7 rotary engine provides a unique power delivery that allows for rapid acceleration. With the right tuning, the NA Miata can achieve a power-to-weight ratio that rivals many modern sports cars. This increase in horsepower translates to faster lap times and improved driving dynamics.
Improved Handling and Balance
Despite the added weight of the turbo engine, the Miata’s overall balance and handling characteristics can remain intact. Proper suspension upgrades and weight distribution adjustments can enhance cornering capabilities and stability, making the car feel more planted on the road.
Real-World Performance Results
Owners who have completed the RX7 turbo swap on their NA Miatas report impressive performance results. Many have documented their experiences on various platforms, showcasing the capabilities of their builds.
Acceleration and Top Speed
With the 200 HP setup, many NA Miatas can achieve 0-60 mph times in the low 5-second range. The top speed can also increase significantly, with some builds reaching speeds over 140 mph, depending on gearing and tuning.
Track Performance
On the track, the combination of power and handling allows the NA Miata to compete with more powerful vehicles. Many drivers report improved lap times and a more engaging driving experience, thanks to the turbocharged power delivery and lightweight chassis.
Challenges and Considerations
While the RX7 turbo swap offers numerous benefits, it is not without its challenges. Potential owners should consider the following:
- Complexity of the swap: Requires mechanical knowledge and skills
- Cost of components: Quality parts can be expensive
- Tuning: Proper tuning is essential for reliability and performance
- Legal considerations: Emissions regulations may affect legality
Conclusion
The RX7 turbo swap is a popular modification for NA Miata owners seeking more power and performance. With the potential to reach 200 HP and enhance the driving experience, this swap can transform a beloved sports car into a thrilling machine. However, it is essential to weigh the benefits against the challenges and ensure proper planning and execution for a successful build.