Table of Contents
The Subaru WRX GD is a beloved platform among car enthusiasts, known for its rally heritage and impressive performance. However, many owners seek to elevate their vehicles beyond the factory specifications. This article delves into the world of forced induction upgrades, focusing on how to achieve over 400 horsepower through upgraded turbos and intercoolers.
Understanding Forced Induction
Forced induction refers to the process of forcing more air into the engine’s combustion chamber, allowing for more fuel to be burned and thus increasing power output. The two most common types of forced induction are turbocharging and supercharging. For the GD WRX, turbocharging is the preferred method due to its efficiency and performance benefits.
Stock vs. Upgraded Turbo
The stock turbocharger on the GD WRX is designed to provide a balance between performance and reliability. However, for those looking to push the limits, upgrading to a larger turbo is essential.
Choosing the Right Turbo
When selecting an upgraded turbo, consider the following options:
- TD05H 16G Turbo: A popular choice for a good balance of power and spool time.
- FP Green Turbo: Known for its ability to support over 400 horsepower.
- Blouch 1.5XTR Turbo: Offers excellent performance and reliability for high horsepower builds.
Installation Considerations
Upgrading the turbo requires careful installation. Key considerations include:
- Proper tuning to ensure the engine runs smoothly with the new turbo.
- Upgraded fuel injectors to supply the necessary fuel for increased horsepower.
- High-flow fuel pump for adequate fuel delivery.
Upgrading the Intercooler
An upgraded intercooler is vital for maintaining optimal performance, especially when increasing boost levels. A larger intercooler helps reduce intake air temperatures, which can significantly improve engine efficiency and power.
Benefits of an Upgraded Intercooler
Here are some benefits of upgrading the intercooler:
- Lower Intake Temperatures: Cooler air is denser, allowing for more oxygen in the combustion chamber.
- Improved Performance: Increased efficiency leads to better throttle response and more power.
- Reliability: Reduces the risk of knock and detonation under high boost conditions.
Choosing an Intercooler
When selecting an intercooler, consider the following options:
- Process West Verticooler: Offers excellent cooling performance with a compact design.
- Grimmspeed Top Mount Intercooler: Known for its efficiency and ease of installation.
- ETS Front Mount Intercooler: Provides superior cooling and is ideal for high horsepower setups.
Tuning for Maximum Performance
After upgrading the turbo and intercooler, proper tuning is essential to unlock the full potential of your GD WRX. A professional tune will ensure that the engine runs efficiently and safely with the new components.
Types of Tuning
There are several tuning options available:
- ECU Reflash: A common method that modifies the factory ECU settings.
- Standalone ECU: Offers the most flexibility and control over engine parameters.
- Piggyback Systems: Provides an additional layer of tuning without replacing the factory ECU.
Supporting Modifications
To support the increased power from the upgraded turbo and intercooler, consider additional modifications:
- Exhaust System Upgrade: A high-flow exhaust will reduce back pressure and improve performance.
- Upgraded Clutch: Necessary for handling the increased torque and power.
- Suspension Upgrades: Enhances handling and stability at higher speeds.
Conclusion
Upgrading the turbo and intercooler on your GD WRX can lead to impressive gains in horsepower, allowing you to achieve the coveted 400+ hp mark. With the right components and tuning, your WRX can transform into a high-performance machine that delivers an exhilarating driving experience.
Whether you’re a seasoned enthusiast or a newcomer to the tuning scene, understanding the fundamentals of forced induction upgrades is essential for maximizing your vehicle’s potential.