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The Mazda 13B-REW engine is a legendary powerplant known for its unique rotary design and impressive performance capabilities. For enthusiasts looking to unlock even more potential from this engine, various performance modifications can lead to significant horsepower gains. This article explores the best performance mods for the 13B-REW, focusing on intake and exhaust upgrades that can help achieve 50+ wheel horsepower (Whp) gains.
Understanding the 13B-REW Engine
The 13B-REW is a part of Mazda’s Wankel rotary engine family, featuring a compact and lightweight design. This engine is renowned for its high-revving nature and smooth power delivery. However, like any performance engine, there are ways to enhance its capabilities further.
Key Performance Mods for the 13B-REW
1. Intake Upgrades
Upgrading the intake system is one of the first modifications enthusiasts should consider. A high-performance intake can improve airflow, leading to better combustion and increased power output.
- Cold Air Intake: A cold air intake system replaces the factory airbox, drawing cooler air from outside the engine bay. This helps improve engine efficiency and power.
- Aftermarket Filters: Upgrading to a high-flow air filter can reduce restrictions and allow for better airflow through the intake system.
- Intake Manifold: An upgraded intake manifold can optimize airflow distribution to the rotors, enhancing performance across the RPM range.
2. Exhaust Modifications
The exhaust system plays a crucial role in the overall performance of the 13B-REW. A free-flowing exhaust allows for quicker expulsion of exhaust gases, improving engine efficiency and power.
- High-Performance Exhaust Header: Replacing the stock exhaust manifold with a performance header can significantly reduce backpressure and improve exhaust flow.
- Cat-Back Exhaust System: An aftermarket cat-back exhaust system enhances sound and performance by allowing exhaust gases to exit more freely.
- High-Flow Catalytic Converter: Upgrading to a high-flow cat can improve exhaust flow while still meeting emissions standards.
3. ECU Tuning
Once the intake and exhaust modifications are complete, tuning the engine’s ECU is essential to maximize performance gains. A proper tune can adjust fuel maps, ignition timing, and other parameters to optimize the engine’s performance.
- Standalone ECU: Installing a standalone ECU allows for more precise tuning and control over engine parameters.
- Reflash Tuning: Many aftermarket companies offer reflash options for the stock ECU, providing performance improvements without the need for a complete replacement.
4. Supporting Mods
To ensure the engine can handle the increased performance from these mods, several supporting modifications may be necessary. These upgrades help maintain reliability and performance.
- Upgraded Fuel System: A higher-flow fuel pump and larger injectors may be required to supply adequate fuel for the increased airflow.
- Intercooler System: For those running a turbo or supercharger, an upgraded intercooler can help keep intake temperatures down, improving performance and reliability.
- Oil Cooler: Increased power can lead to higher engine temperatures, making an oil cooler a wise investment for maintaining engine health.
Conclusion
The Mazda 13B-REW engine has immense potential for performance enhancements. By focusing on intake and exhaust modifications, along with proper tuning and supporting upgrades, enthusiasts can achieve significant horsepower gains. Whether you’re a seasoned racer or a casual driver, these performance mods can help you unlock the full potential of your 13B-REW engine.