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The quest for more power in the Mazda 13B rotary engine often leads enthusiasts to consider turbo upgrades. Among the most popular choices are the Holset HY35 and the Garrett T3/T4 turbos. In this article, we will compare these two options to determine which turbo delivers the best power for the 13B.
Overview of the 13B Engine
The Mazda 13B is a lightweight, compact rotary engine known for its high RPM capabilities and unique design. This engine is often found in various Mazda vehicles, including the RX-7 and RX-8. Due to its characteristics, it benefits significantly from turbocharging, which can enhance power output and performance.
Understanding Turbochargers
A turbocharger compresses the air entering the engine, allowing for more fuel to be burned and thus increasing power. The choice of turbocharger can greatly affect the engine’s performance, responsiveness, and overall driving experience.
Holset HY35 Turbo
The Holset HY35 is a popular choice among rotary enthusiasts for its robust design and performance capabilities. Here are some key features:
- Compressor Size: 60mm
- Max Boost Pressure: 30 psi
- Power Range: 300-400 HP
- Response: Good spool characteristics
The HY35 is known for its durability and ability to handle high boost levels, making it suitable for high-performance applications.
Garrett T3/T4 Turbo
The Garrett T3/T4 turbo is another popular option, known for its versatility and performance. Here are its key features:
- Compressor Size: Available in various sizes (commonly 50-60mm)
- Max Boost Pressure: 25-30 psi
- Power Range: 350-500 HP
- Response: Quick spool with larger variants
The T3/T4 offers a range of options, making it adaptable to different performance needs and setups.
Comparative Analysis
When comparing the Holset HY35 and Garrett T3/T4 turbos for the 13B engine, several factors come into play:
- Power Output: The Garrett T3/T4 has a slightly higher potential power output, especially in larger configurations.
- Spool Time: The Holset HY35 generally spools faster due to its design, which can be advantageous for street applications.
- Durability: Both turbos are built for performance, but the Holset is often regarded as more robust under extreme conditions.
- Cost: The Garrett T3/T4 is usually more affordable and widely available.
Ultimately, the choice between the two turbos will depend on the specific goals and setup of the 13B engine.
Installation Considerations
Installing either turbo on a 13B engine requires careful planning and execution. Key considerations include:
- Exhaust and Intake Piping: Ensure proper fitment and routing to avoid boost leaks.
- Fuel System: Upgrade fuel injectors and pump to support increased power levels.
- Tuning: A proper tune is essential to maximize performance and reliability.
- Cooling: Consider upgrading the intercooler for better efficiency.
Taking these factors into account will help ensure a successful turbo installation.
Conclusion
Both the Holset HY35 and Garrett T3/T4 turbos offer significant performance improvements for the Mazda 13B engine. The best choice ultimately depends on individual goals, driving style, and budget. For those seeking quick spool and robust performance, the Holset HY35 is an excellent option. Conversely, the Garrett T3/T4 provides versatility and higher power potential, making it suitable for a wide range of applications.
Regardless of the choice, both turbos can elevate the performance of the 13B rotary engine, allowing enthusiasts to enjoy the thrill of increased power and responsiveness.