Table of Contents
The Subaru GD WRX is a beloved model among car enthusiasts, known for its rally heritage and impressive performance. For those looking to enhance their driving experience, achieving over 300 horsepower with Stage 2 upgrades is a popular goal. This article will explore the top power modifications that can help you reach that milestone.
Understanding Stage 2 Upgrades
Stage 2 upgrades typically involve a combination of performance parts and tuning that allow the engine to breathe better and produce more power. This stage builds upon the foundation set by Stage 1 modifications, which usually include basic upgrades like an aftermarket air intake and a tune. Stage 2 takes it a step further.
Key Modifications for Achieving 300+ HP
- High-Performance Turbocharger: Upgrading to a larger turbocharger can significantly increase the amount of air and fuel entering the engine, leading to more power.
- Upgraded Intercooler: A larger intercooler helps to cool the intake air, which improves engine efficiency and performance.
- High-Flow Fuel Injectors: These injectors allow for more fuel to be delivered to the engine, supporting higher horsepower levels.
- Performance Exhaust System: A less restrictive exhaust system reduces back pressure, allowing the engine to expel exhaust gases more efficiently.
- ECU Tune: A custom ECU tune optimizes the engine’s performance settings to maximize power output with the new modifications.
High-Performance Turbocharger Options
When upgrading the turbocharger, several options stand out for GD WRX owners. Each turbocharger offers different performance characteristics, so it’s essential to choose one that fits your goals.
- Garrett GTX3071R: Known for its quick spool time and robust power delivery, this turbo is a favorite among enthusiasts.
- Blouch 20G-XT: This turbo provides a great balance of power and reliability, making it an excellent choice for those looking for a significant upgrade.
- FP Green Turbo: A popular choice for those seeking high horsepower numbers, the FP Green can support well over 300 HP.
Upgraded Intercoolers
An upgraded intercooler is crucial for maintaining optimal air temperatures, especially when increasing boost levels. Here are some top options:
- Process West Verticooler: This top-mount intercooler is known for its excellent cooling efficiency and fitment.
- Greddy Front Mount Intercooler: A front-mount option that provides significant cooling benefits and a sleek appearance.
- AMS Performance Front Mount Intercooler: Offers a large core size for maximum cooling, ideal for high horsepower builds.
Fuel System Upgrades
To support increased horsepower, your fuel system must be able to deliver the necessary fuel volume. Here’s what to consider:
- DeatschWerks Fuel Injectors: Available in various flow rates, these injectors are a reliable choice for high-performance applications.
- Walbro 255 Fuel Pump: This high-flow fuel pump is a popular upgrade for those looking to increase fuel delivery.
- Fuel Pressure Regulator: Ensures consistent fuel pressure, which is critical for maintaining performance.
Performance Exhaust Systems
A performance exhaust system not only enhances sound but also improves engine efficiency. Key options include:
- Invidia Q300 Cat-Back Exhaust: Known for its deep tone and excellent performance, this system is a favorite among WRX owners.
- HKS Hi-Power Exhaust: Offers a lightweight design and aggressive sound, making it a great choice for performance enthusiasts.
- GrimmSpeed Turbo-Back Exhaust: This complete system maximizes exhaust flow and is designed for high-performance applications.
ECU Tuning for Optimal Performance
After installing your upgrades, a proper ECU tune is essential to unlock the full potential of your GD WRX. Here’s what to consider:
- Accessport by COBB Tuning: A versatile tuning solution that allows for easy adjustments and monitoring of performance parameters.
- ECUtek Tuning: Offers custom tuning solutions for those looking for a tailored approach to their performance needs.
- Open Source Tuning: A cost-effective option for those who want to tune their vehicle using community-developed software.
Conclusion
Achieving over 300 horsepower in your GD WRX is an exciting journey that requires careful selection of modifications. By upgrading your turbocharger, intercooler, fuel system, exhaust, and tuning, you can unlock the true potential of your vehicle. Always remember to balance performance with reliability to enjoy your WRX for years to come.