Building a 13b Rew for Track Days: Power, Cost, and Results

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The Mazda 13B REW engine is a legendary powerplant known for its lightweight design and high-revving capabilities. When it comes to track days, building a 13B REW can yield impressive power and performance. This article will explore the essential aspects of building a 13B REW for track days, including power output, costs involved, and the results you can expect.

Understanding the 13B REW Engine

The 13B REW is a part of Mazda’s Wankel rotary engine family. Its compact size and unique rotary design make it an excellent choice for motorsport applications. Here are some key features of the 13B REW:

  • Displacement: 1.3 liters
  • Configuration: Rotary engine
  • Power Output: Typically ranges from 120 to 280 horsepower in stock form
  • Weight: Approximately 100-120 lbs

Powering Up the 13B REW

To maximize performance for track days, enhancing the power output of the 13B REW is essential. Here are some common modifications to consider:

  • Porting: Modifying the intake and exhaust ports can significantly increase airflow, resulting in higher power output.
  • Aftermarket Intake Manifold: Upgrading to a performance intake manifold helps improve air distribution and throttle response.
  • Exhaust System: A high-performance exhaust system reduces back pressure, allowing the engine to breathe better.
  • ECU Tuning: Custom tuning of the engine management system optimizes fuel delivery and ignition timing for enhanced performance.
  • Forced Induction: Adding a turbocharger or supercharger can dramatically increase power, but requires careful tuning and component upgrades.

Cost Considerations

Building a 13B REW for track days involves various costs, which can vary significantly based on the modifications you choose. Below is a breakdown of potential expenses:

  • Engine Rebuild: $1,500 – $3,000
  • Porting Services: $500 – $1,500
  • Aftermarket Parts (Intake/Exhaust): $1,000 – $3,000
  • ECU Tuning: $300 – $1,000
  • Forced Induction Setup: $2,500 – $5,000

Expected Results

With the right modifications, a well-built 13B REW can provide exhilarating performance on the track. Here’s what you can typically expect:

  • Power Output: Depending on modifications, expect between 250 to 400 horsepower.
  • Weight-to-Power Ratio: The lightweight engine allows for an impressive power-to-weight ratio, enhancing acceleration and handling.
  • Track Performance: Improved lap times and overall handling characteristics, especially with proper suspension upgrades.

Conclusion

Building a 13B REW for track days can be a rewarding project that combines engineering, performance, and fun. By understanding the power potential, costs, and expected results, enthusiasts can create a track-ready vehicle that stands out on the circuit. Always remember to prioritize safety and reliability when modifying your engine for high-performance applications.