Table of Contents
The Subaru WRX is a beloved performance vehicle, renowned for its rally heritage and impressive power potential. For enthusiasts looking to push the limits, achieving 450 horsepower on a built WRX engine is an exciting goal. This article will explore the recommended turbocharger, fuel system, and tuning strategies to reach this power level.
Choosing the Right Turbocharger
The turbocharger is a critical component in achieving high horsepower. Selecting the right turbo is essential for balancing power and drivability. Here are some popular options:
- Garrett GTX3071R: Known for its quick spool and high efficiency, this turbo can support up to 500 hp.
- Blouch 20G-XT: A favorite among WRX builders, offering a great balance of power and responsiveness.
- FP Green: Provides excellent top-end power, ideal for those aiming for high horsepower setups.
Upgrading the Fuel System
A robust fuel system is vital to support increased horsepower. Upgrading components ensures that the engine receives the necessary fuel to perform optimally. Consider the following components:
- Fuel Injectors: Upgrade to high-flow injectors (e.g., 1000cc) to ensure adequate fuel delivery.
- Fuel Pump: A high-performance fuel pump (e.g., Walbro 450) is essential for maintaining fuel pressure.
- Fuel Pressure Regulator: An adjustable fuel pressure regulator allows for fine-tuning fuel delivery.
Tuning for Maximum Performance
After upgrading the turbo and fuel system, proper tuning is crucial to unleash the engine’s full potential. Here are key aspects to consider during the tuning process:
- ECU Remapping: Utilize a professional tuner to remap the ECU, optimizing fuel and ignition maps.
- Dyno Testing: Conduct dyno runs to monitor performance and make necessary adjustments.
- Monitoring Tools: Use wideband O2 sensors and data loggers to track engine performance in real-time.
Additional Modifications to Consider
To support the increased power and ensure reliability, consider additional modifications:
- Upgraded Intercooler: A larger intercooler reduces intake temperatures, improving performance and longevity.
- Exhaust System: A high-flow exhaust system enhances turbo efficiency and reduces back pressure.
- Engine Internals: Consider upgrading pistons and rods for added strength and reliability under high boost.
Conclusion
Achieving 450 horsepower on a built WRX engine is an ambitious yet attainable goal with the right components and tuning. By carefully selecting a turbocharger, upgrading the fuel system, and ensuring professional tuning, WRX enthusiasts can enjoy exhilarating performance while maintaining reliability. Always remember to prioritize quality parts and expert tuning to maximize your WRX’s potential.