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The Mazda RX-7 is a legendary sports car known for its lightweight design and rotary engine. One of the most effective ways to boost its performance is through turbocharger upgrades. In this article, we will explore the top 10 power gains for the Mazda RX-7, focusing on turbocharger upgrades from Garrett GT35 to Holset HX35.
1. Introduction to Turbocharger Upgrades
Turbochargers are critical for enhancing the power output of the RX-7’s rotary engine. Upgrading from a stock turbo to a high-performance model can significantly improve horsepower and torque, making the car more exhilarating to drive.
2. Understanding the Garrett GT35 Turbocharger
The Garrett GT35 is a popular choice among RX-7 enthusiasts. Known for its reliability and efficiency, it offers a good balance of power and spool time. Here are some key features:
- Compressor size: 60mm
- Max horsepower: 500 HP
- Ideal for street and track use
3. Benefits of Upgrading to Holset HX35
The Holset HX35 turbocharger is another excellent upgrade option. It’s known for its robust construction and ability to handle high boost levels. The benefits include:
- Compressor size: 60mm
- Max horsepower: 600 HP
- Faster spool time compared to GT35
4. Comparing Power Gains: GT35 vs. HX35
When comparing the power gains between the Garrett GT35 and Holset HX35, it’s essential to consider various factors:
- Boost levels: HX35 can handle higher boost levels for more power.
- Response time: HX35 typically spools quicker than GT35.
- Durability: HX35 is built for heavy-duty applications, ensuring longevity.
5. Installation Considerations
Installing a new turbocharger requires careful planning and consideration. Here are some important factors to keep in mind:
- Compatibility with existing components
- Required modifications to the exhaust system
- Upgrading fuel injectors and fuel pump
6. Tuning for Maximum Performance
After upgrading the turbocharger, proper tuning is essential to maximize performance. This includes:
- Adjusting air-fuel ratios
- Optimizing ignition timing
- Using a performance ECU
7. Real-World Power Gains
Many RX-7 owners have reported significant power gains after upgrading to the Holset HX35. Typical results include:
- Increased horsepower from 400 to 600 HP
- Improved torque delivery
- Better throttle response
8. Cost Considerations
Upgrading a turbocharger can be a significant investment. Here’s a breakdown of potential costs:
- Garrett GT35: $1,200 – $1,500
- Holset HX35: $800 – $1,200
- Installation and tuning: $500 – $1,000
9. Maintenance Tips for Turbocharged RX-7
To ensure longevity and performance of your upgraded turbocharger, consider these maintenance tips:
- Regular oil changes with high-quality synthetic oil
- Inspecting boost levels and performance regularly
- Cleaning the air filter to ensure optimal airflow
10. Conclusion
Upgrading to a Holset HX35 turbocharger from a Garrett GT35 can provide substantial power gains for the Mazda RX-7. With the right installation, tuning, and maintenance, enthusiasts can enjoy a thrilling driving experience while maximizing the performance of their rotary engine.