Table of Contents
The Subaru BRZ and Toyota 86, powered by the FA20 engine, have gained a reputation for their performance potential. However, if you’re looking to push the limits with higher boost levels, upgrading the valve springs is essential for maintaining engine reliability and performance. In this article, we will explore the best valve spring upgrades for the BRZ FA20 that can support higher boost levels.
Understanding Valve Springs and Their Importance
Valve springs play a crucial role in the engine’s performance by controlling the opening and closing of the engine’s valves. When increasing boost levels, the engine experiences higher cylinder pressures, which can lead to valve float if the stock springs are not capable of handling the increased demands. Upgrading to performance valve springs ensures that the valves remain properly seated, improving overall engine performance and longevity.
Top Valve Spring Upgrades for BRZ FA20
- BC Racing Valve Springs: Known for their high-quality materials and excellent performance, BC Racing valve springs are designed to handle high boost levels while providing reliable operation.
- GSC Power-Division Valve Springs: GSC offers a range of valve springs specifically designed for turbocharged applications, ensuring that they can handle the increased pressure and RPMs.
- Supertech Performance Valve Springs: These springs are made from high tensile strength materials, providing durability and performance for high boost applications.
- Brian Crower Valve Springs: Brian Crower’s springs are engineered for high-performance applications, capable of withstanding the rigors of boosted setups.
- HKS Valve Springs: HKS is a well-known brand in the performance industry, and their valve springs are designed to support high RPMs and boost levels effectively.
Factors to Consider When Choosing Valve Springs
When selecting the right valve springs for your BRZ FA20, consider the following factors:
- Spring Rate: The spring rate determines how much force is required to compress the spring. A higher spring rate is often necessary for boosted applications to prevent valve float.
- Material Quality: Look for valve springs made from high-quality materials that can withstand the stresses of high RPMs and boost levels.
- Compatibility: Ensure that the valve springs are compatible with your specific engine setup, including any camshaft upgrades.
- Installation Requirements: Some valve springs may require additional modifications or specific installation techniques, so be sure to check the manufacturer’s recommendations.
Installation Tips for Valve Spring Upgrades
Upgrading your valve springs can be a complex process, so consider the following tips to ensure a successful installation:
- Use the Right Tools: Having the proper tools, such as a valve spring compressor, will make the installation process much smoother.
- Follow Manufacturer Instructions: Each brand may have specific installation guidelines, so be sure to follow them closely for optimal results.
- Check Valve Clearances: After installation, verify that there are no clearance issues between the valves and pistons, especially if you have upgraded camshafts.
- Consider Professional Help: If you’re not comfortable with the installation process, it may be wise to seek help from a professional mechanic.
Conclusion
Upgrading the valve springs in your BRZ FA20 is a critical step when planning to run higher boost levels. Choosing the right springs can significantly impact engine performance and reliability. By considering the options available and following proper installation techniques, you can ensure that your engine performs at its best under boosted conditions.