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The Mazda 13B-REW engine has long been a favorite among performance enthusiasts, particularly for its unique rotary design and impressive power output. In this article, we will explore the real-world dyno results of a 13B-REW engine that has been modified with Stage 2 enhancements, achieving a remarkable 320 horsepower at the wheels.
Understanding the 13B-REW Engine
The 13B-REW is a part of Mazda’s renowned Wankel rotary engine family, characterized by its compact size and lightweight design. This engine is known for its high-revving capabilities and smooth power delivery, making it an ideal candidate for performance modifications.
Key Features of the 13B-REW
- Displacement: 1.3 liters (two rotors)
- Power Rating: Factory rated around 280 hp
- Weight: Approximately 150 lbs
- Configuration: Naturally aspirated or turbocharged options
Stage 2 Modifications Overview
Stage 2 modifications typically include upgrades that significantly enhance the engine’s performance without compromising reliability. For the 13B-REW, these modifications can include improved intake and exhaust systems, upgraded fuel injectors, and tuning adjustments to maximize the engine’s output.
Common Stage 2 Modifications
- High-flow intake manifold
- Performance exhaust system
- Upgraded fuel injectors
- ECU remapping or aftermarket tuning
- Intercooler upgrades (if turbocharged)
Dyno Testing Methodology
To accurately measure the performance gains from the Stage 2 modifications, a dyno test was conducted. This involved placing the modified 13B-REW engine on a chassis dynamometer, which measures the power output at the wheels, providing a realistic assessment of the engine’s performance.
Dyno Test Setup
- Dyno Type: AWD chassis dynamometer
- Ambient Conditions: Standard temperature and pressure
- Fuel Type: 93 octane premium gasoline
- Test Duration: Multiple runs to ensure consistency
Results of the Dyno Test
The results of the dyno test were impressive, showcasing the capabilities of the 13B-REW engine when equipped with Stage 2 modifications. The engine produced a peak power output of 320 horsepower at the wheels, a significant improvement over the factory rating.
Power Curve Analysis
The power curve displayed during the dyno run illustrated a smooth and linear increase in power, with peak torque also elevated. This indicates that the modifications not only boosted horsepower but also improved overall drivability.
Implications of the Results
The achievement of 320 hp at the wheels with Stage 2 modifications highlights the potential of the 13B-REW engine for performance enthusiasts. This level of power allows for thrilling driving experiences and competitive performance in various motorsport applications.
Comparative Analysis
- Compared to stock performance, this represents a nearly 40 hp increase.
- Performance metrics rival those of larger displacement engines.
- Improved throttle response and acceleration characteristics.
Conclusion
The real-world dyno results of the 13B-REW engine, achieving 320 hp at the wheels with Stage 2 modifications, exemplify the engine’s potential for performance upgrades. With the right enhancements, the 13B-REW can deliver exhilarating power and responsiveness, making it a standout choice for rotary engine enthusiasts.
Future Modifications
- Consider Stage 3 modifications for even higher performance.
- Explore lightweight components to reduce overall vehicle weight.
- Investigate advanced tuning options for optimized performance.