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The Subaru WRX is known for its impressive performance and tuning potential. For enthusiasts looking to push their WRX beyond the 500 horsepower mark, upgrading the camshaft and exhaust system is crucial. This article will compare different camshaft and exhaust upgrades that can help achieve this goal.
Understanding Camshaft Upgrades
The camshaft plays a vital role in controlling the engine’s airflow, which directly impacts performance. Upgrading the camshaft can enhance the engine’s ability to breathe, leading to significant power gains. Here are some key factors to consider when selecting a camshaft upgrade:
- Lift: Higher lift can improve airflow but may require additional modifications.
- Duration: Longer duration can increase power at higher RPMs but may affect idle quality.
- Profile: Different profiles can alter the power band and torque delivery.
Popular Camshaft Options for WRX
Several camshaft options are popular among WRX tuners. Below are a few notable choices:
- BC Racing Stage 1 Camshaft: Ideal for those looking for a balance between performance and drivability.
- GSC Power-Division S2 Camshaft: Offers aggressive lift and duration for high RPM power.
- Grimmspeed Camshaft: Designed for maximum airflow and power output.
Exhaust System Upgrades
The exhaust system is another critical area for performance enhancement. A well-designed exhaust can reduce back pressure and improve exhaust flow, which is essential for maximizing horsepower. Here are some aspects to consider when upgrading your exhaust system:
- Pipe Diameter: Larger diameter pipes can reduce back pressure but may require tuning adjustments.
- Material: Stainless steel is preferred for durability and resistance to corrosion.
- Design: Straight-through designs typically offer better flow compared to chambered designs.
Top Exhaust Systems for WRX
When considering exhaust upgrades for a WRX, several systems stand out:
- Invidia Q300 Exhaust: Known for its aggressive tone and excellent performance.
- HKS Hi-Power Exhaust: Offers a balanced sound and improved exhaust flow.
- Greddy Supreme SP Exhaust: Features a unique design that enhances performance while maintaining a pleasant sound.
Combining Camshaft and Exhaust Upgrades
For optimal performance, it’s essential to consider how camshaft and exhaust upgrades work together. The right combination can lead to significant horsepower gains. Here are some tips for pairing these upgrades:
- Match Lift and Duration: Ensure the camshaft’s lift and duration complement the exhaust system’s flow characteristics.
- Tuning: Proper tuning is critical after making upgrades to maximize performance and reliability.
- Consider Engine Management: Upgrading the engine management system can help optimize the performance of both the camshaft and exhaust.
Conclusion
Upgrading the camshaft and exhaust system of a WRX built engine is a powerful way to exceed the 500 horsepower mark. By carefully selecting compatible upgrades and ensuring proper tuning, enthusiasts can unlock the full potential of their vehicles. Always consult with professionals to achieve the best results and maintain engine reliability.