Table of Contents
When it comes to maximizing the performance of a Mazda RX-7 with a 13B engine, selecting the right turbocharger is crucial. This article will explore the best size 13B turbo options for stock internals, focusing on achieving a safe output of 400-450 horsepower.
Understanding the 13B Engine
The 13B engine is known for its lightweight design and high-revving capabilities. However, pushing it beyond its limits can lead to potential failures. Here are some key characteristics of the 13B engine:
- Rotary design with two rotors
- Displacement of 1.3 liters
- Lightweight and compact structure
Choosing the Right Turbocharger
Selecting the appropriate turbocharger for your 13B engine is essential for achieving the desired power output while maintaining reliability. Factors to consider include:
- Compressor size and efficiency
- Turbocharger type (journal bearing vs. ball bearing)
- Boost levels and tuning capabilities
Top Turbo Options for 400-450 HP
Here are some of the best size 13B turbo options that can safely help you achieve 400-450 horsepower:
- Garrett GT2871R: Known for its quick spool and excellent mid-range power, this turbo is a popular choice for 13B builds.
- Precision 5858: This turbo offers a good balance of power and response, making it suitable for street and track use.
- Holset HX35: Renowned for durability, the HX35 can handle high boost levels while providing reliable performance.
- BorgWarner EFR 7670: With advanced technology, this turbo provides fast spool times and high efficiency.
Supporting Modifications
To safely achieve 400-450 hp with a stock 13B engine, consider the following supporting modifications:
- Upgraded fuel injectors
- High-flow fuel pump
- Aftermarket intercooler
- Performance exhaust system
- ECU tuning for optimal fuel and ignition mapping
Boost Management
Proper boost management is crucial to ensure the longevity of your 13B engine. Here are some strategies to consider:
- Install a boost controller to regulate boost levels
- Monitor boost pressure with a gauge
- Use a wastegate to prevent overboost conditions
Tuning for Performance
After installing a turbocharger and supporting modifications, tuning is vital. A proper tune will ensure the engine runs efficiently and safely. Consider these tuning options:
- Standalone engine management systems
- Reflashing the stock ECU
- Dyno tuning for precise adjustments
Conclusion
Choosing the right size 13B turbo for stock internals can help you achieve a safe and reliable 400-450 horsepower. By selecting a suitable turbocharger, making necessary supporting modifications, managing boost effectively, and ensuring proper tuning, you can enjoy the full potential of your RX-7 without compromising engine integrity.