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The Subaru WRX has long been a favorite among car enthusiasts for its performance, handling, and rally heritage. The VA generation of the WRX, introduced in 2015, is no exception. With the right modifications, achieving 400 horsepower is within reach. This article will explore turbo upgrades, exhaust systems, and ECU tuning options to help you reach that goal.
Understanding the VA WRX Platform
The VA WRX is powered by a 2.0-liter turbocharged flat-four engine. This engine is known for its potential to handle power upgrades, but achieving 400 hp requires careful planning and the right components. Before diving into modifications, it’s essential to understand the engine’s limits and the supporting modifications needed for reliability.
Turbocharger Upgrades
The turbocharger is the heart of any performance build. Upgrading the turbo is crucial for hitting the 400 hp mark. Here are some recommended turbo options:
- Garrett GTX3071R: Known for its quick spool and high efficiency, this turbo can support up to 500 hp.
- Blouch 1.5XTR: A popular choice among WRX enthusiasts, it offers excellent power delivery and reliability.
- FP Black: This turbo is designed for high horsepower builds and can easily exceed 400 hp with the right setup.
Exhaust System Upgrades
A high-flow exhaust system is essential for maximizing turbo efficiency and achieving your horsepower goals. Consider the following exhaust upgrades:
- Cat-Back Exhaust Systems: Brands like Cobb, Invidia, and Borla offer cat-back systems that improve exhaust flow and sound.
- Downpipe: Upgrading to a high-flow downpipe is crucial for reducing turbo lag and increasing power. Look for options from companies like Grimmspeed or Tomei.
- Headers: Performance headers can further enhance exhaust flow, contributing to better overall performance.
ECU Tuning
After upgrading the turbo and exhaust, tuning the ECU is vital to unleash the full potential of your WRX. Here are some tuning options:
- Accessport by Cobb: This handheld tuner allows for easy flashing of maps and is user-friendly for beginners.
- ECUtek: Offers custom tuning solutions, providing tailored maps for your specific setup.
- Open Source Tuning: For those with experience, open source tuning can provide flexibility and control over your tuning process.
Supporting Modifications
To support the increased power levels, additional modifications are necessary to ensure reliability and performance:
- Fuel System Upgrade: Consider upgrading to larger fuel injectors and a high-flow fuel pump to meet the increased fuel demands.
- Intercooler: A larger intercooler can help maintain lower intake temperatures, improving performance and reliability.
- Engine Management: Invest in a quality engine management system to monitor and adjust parameters for optimal performance.
Conclusion
Achieving 400 hp on a VA WRX is an attainable goal with the right modifications. By upgrading the turbo, exhaust system, and tuning the ECU, you can unlock the full potential of your WRX while ensuring reliability. Always remember to consider supporting modifications to maintain your vehicle’s performance and longevity. Happy tuning!