Building a 400 Hp Subaru Wrx: Recommended Turbochargers, Intercoolers, and Fuel Systems

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The Subaru WRX has long been a favorite among car enthusiasts and performance tuners. With its turbocharged engine and all-wheel-drive capabilities, the WRX is an ideal platform for building a high-performance vehicle. In this article, we will explore how to build a 400 horsepower Subaru WRX by focusing on key components such as turbochargers, intercoolers, and fuel systems.

Choosing the Right Turbocharger

The turbocharger is the heart of any performance build. Selecting the right turbo is crucial for achieving your horsepower goals while maintaining reliability. Here are some recommended turbochargers for a 400 HP Subaru WRX:

  • Garrett GTX3076R: Known for its quick spool and high efficiency, this turbo provides a great balance of power and response.
  • FP Black: This turbo is capable of producing high horsepower numbers while maintaining excellent drivability.
  • Blouch 1.5XTR: A popular choice among WRX enthusiasts, this turbo offers impressive power gains and reliability.

Upgrading the Intercooler

An efficient intercooler is essential for keeping intake temperatures down, which helps maintain performance and reliability. Here are some top intercooler options for your WRX build:

  • Process West Verticooler: This top-mount intercooler is designed for optimal airflow and cooling efficiency.
  • GrimmSpeed Front Mount Intercooler: A front-mount option that significantly improves cooling and reduces pressure drop.
  • ETS Front Mount Intercooler: Known for its large core size and efficient design, this intercooler is perfect for high horsepower builds.

Fuel System Upgrades

To support your 400 HP goal, upgrading the fuel system is crucial. An adequate supply of fuel ensures your engine runs smoothly and efficiently. Here are some recommended upgrades:

  • Fuel Injectors: Consider upgrading to 1000cc or larger injectors to meet the fuel demands of your build.
  • Fuel Pump: A high-flow fuel pump, such as the Walbro 450, is essential for delivering enough fuel under high load conditions.
  • Fuel Pressure Regulator: An adjustable regulator allows you to fine-tune fuel pressure for optimal performance.

Tuning Your Subaru WRX

After upgrading your turbocharger, intercooler, and fuel system, proper tuning is essential to maximize performance. A professional tune ensures that your engine runs efficiently and reliably at higher power levels. Here are some tuning options:

  • ECU Reflash: A custom ECU tune can optimize fuel maps and ignition timing for your specific setup.
  • Standalone ECU: For maximum control, consider a standalone engine management system that allows for advanced tuning options.
  • Tuning Software: Software like Cobb Accessport or OpenECU can provide user-friendly tuning options for enthusiasts.

Conclusion

Building a 400 HP Subaru WRX involves careful selection of components and proper tuning. By choosing the right turbocharger, intercooler, and fuel system, you can achieve impressive performance while maintaining reliability. Always remember to consult with professionals and enthusiasts to ensure your build meets your expectations and performs at its best.