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The Mazda 13B-REW engine is a well-known rotary engine celebrated for its lightweight design and high-revving capabilities. Achieving 350+ wheel horsepower (WHP) from this engine is a goal for many enthusiasts. However, tuning a 13B-REW engine requires careful consideration to ensure reliability and performance. In this article, we will explore the best tuning strategies to safely reach that power level.
Understanding the 13B-REW Engine
The 13B-REW is a part of Mazda’s Wankel rotary engine family. It features a unique design that allows for a compact size and a high power-to-weight ratio. The engine utilizes two rotors and is known for its smooth operation and high RPM capabilities. However, its design also presents unique challenges when it comes to tuning.
Key Components for Tuning
- Fuel System: Upgrading the fuel injectors and fuel pump is essential for handling increased power levels.
- Exhaust System: A high-flow exhaust system reduces back pressure and improves engine efficiency.
- Intake System: A performance intake manifold and air filter can enhance airflow to the engine.
- ECU Tuning: A proper ECU tune is crucial for optimizing fuel maps and ignition timing.
Fuel System Upgrades
To safely achieve 350+ WHP, the fuel system must be capable of delivering adequate fuel to the engine. This involves upgrading both the fuel injectors and the fuel pump.
Upgrading Fuel Injectors
Higher flow fuel injectors are necessary to meet the increased fuel demands of a tuned 13B-REW engine. Consider injectors rated for at least 550cc/min to ensure sufficient fuel delivery.
Fuel Pump Upgrade
A high-performance fuel pump is also critical. Look for pumps that can support at least 300 liters per hour to maintain a steady fuel supply under high load conditions.
Exhaust System Modifications
An efficient exhaust system is vital for maximizing the performance of the 13B-REW engine. Upgrading to a high-flow exhaust will help reduce back pressure and improve exhaust scavenging.
Choosing the Right Exhaust
Opt for a full cat-back exhaust system made from lightweight materials, such as stainless steel or titanium. This will not only reduce weight but also enhance the sound and performance of the engine.
Intake System Enhancements
Improving the intake system is another crucial step in tuning the 13B-REW engine. A well-designed intake can significantly increase airflow and performance.
Aftermarket Intake Manifold
Consider installing an aftermarket intake manifold that provides better airflow and is designed to optimize performance at higher RPMs.
High-Performance Air Filter
A high-performance air filter can also improve airflow into the engine. Look for filters that offer excellent filtration without restricting airflow.
ECU Tuning
One of the most critical aspects of tuning a 13B-REW engine is the ECU tuning. A proper tune ensures that the engine runs efficiently and safely at higher power levels.
Custom Tuning Solutions
Using a standalone ECU or a piggyback system allows for more precise control over fuel maps and ignition timing. A custom tune should be performed by a professional who understands rotary engines.
Cooling System Upgrades
Increased power output generates more heat, making it essential to upgrade the cooling system to prevent overheating.
Upgrading the Radiator
A high-performance radiator can improve cooling efficiency. Consider a larger core or an aluminum radiator for better heat dissipation.
Oil Cooler Installation
Installing an oil cooler can help maintain optimal oil temperatures, especially during high-performance driving conditions.
Conclusion
Tuning a Mazda 13B-REW engine to achieve 350+ WHP safely requires a comprehensive approach that includes upgrading the fuel system, exhaust, intake, ECU, and cooling system. By following these strategies, enthusiasts can enjoy the thrills of increased power while maintaining the reliability of their rotary engines.