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The Mazda 13B-REW engine is renowned for its unique rotary design and impressive performance. However, enthusiasts often seek ways to enhance its capabilities further. One effective method is cylinder head porting, which can boost power and improve airflow. This article explores the process and benefits of porting the cylinder head of the Mazda 13B-REW, aiming to increase power by 20 horsepower.
Understanding Cylinder Head Porting
Cylinder head porting involves modifying the internal passages of the cylinder head to improve airflow. This process can significantly impact the engine’s performance, especially in a rotary engine like the 13B-REW, which relies heavily on efficient airflow for power generation.
Benefits of Porting the 13B-REW Cylinder Head
- Increased horsepower and torque.
- Improved throttle response.
- Enhanced fuel efficiency.
- Better engine cooling.
- Optimized performance at high RPMs.
The Porting Process
The cylinder head porting process requires precision and skill. Below are the key steps involved in porting the Mazda 13B-REW cylinder head.
1. Disassembly
The first step is to remove the cylinder head from the engine. This involves disconnecting various components, including intake and exhaust manifolds, and carefully lifting the head off the engine block.
2. Inspection
Once the head is removed, inspect it for any damage or wear. Look for cracks, warping, or excessive carbon buildup. Address any issues before proceeding with porting.
3. Porting Techniques
There are several techniques used in cylinder head porting, including:
- Grinding: Using a die grinder to reshape the ports for better airflow.
- Pocket Porting: Enlarging the area around the valves to improve flow.
- Polishing: Smoothing the port surfaces to reduce turbulence.
4. Testing Flow
After porting, it is crucial to test the airflow through the cylinder head. This can be done using a flow bench to measure the improvements in airflow and ensure optimal performance.
5. Reassembly
Once satisfied with the porting results, reassemble the cylinder head, ensuring all components are correctly installed and torqued to specifications. Reinstall the head onto the engine block, reconnecting all necessary parts.
Expected Power Gains
With proper porting techniques, enthusiasts can expect a power increase of approximately 20 horsepower. This gain is particularly noticeable at higher RPMs, where improved airflow translates to better performance.
Considerations and Tips
Before undertaking cylinder head porting, consider the following tips:
- Research and plan your porting strategy carefully.
- Consider consulting with a professional if you are inexperienced.
- Invest in quality tools for better results.
- Be mindful of the balance between airflow and engine characteristics.
Conclusion
Cylinder head porting is a highly effective way to enhance the performance of the Mazda 13B-REW engine. By increasing airflow, enthusiasts can achieve significant power gains and improve overall engine efficiency. With careful planning and execution, porting can unlock the full potential of this iconic rotary engine.