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The Subaru WRX has long been a favorite among car enthusiasts for its rally heritage and impressive performance. For those looking to push their WRX to the next level, achieving 500+ horsepower is a thrilling goal. This article will cover the essential turbocharger upgrades and supporting modifications necessary to reach that power milestone.
Understanding the Basics of Turbocharging
Turbocharging is a method of forced induction that utilizes exhaust gases to spin a turbine, compressing air and forcing it into the engine. This process significantly increases the amount of air available for combustion, leading to higher power output. To build a 500+ HP WRX, it’s crucial to understand the components involved in turbocharging.
- Turbocharger: The heart of the system.
- Intercooler: Cools the compressed air.
- Exhaust System: Reduces back pressure.
Choosing the Right Turbocharger
When it comes to turbocharger upgrades, selecting the right turbo is critical. For a 500+ HP build, consider the following options:
- Garrett GTX3071R: Known for its quick spool and high efficiency.
- FP Black: A popular choice for high horsepower builds.
- Blouch Dominator 1.5: Offers great power and reliability.
Supporting Modifications
To ensure your WRX can handle the increased power from your turbocharger, several supporting modifications are necessary. These upgrades will help maintain reliability and performance.
Fuel System Upgrades
A robust fuel system is essential for high horsepower builds. Consider the following upgrades:
- Fuel Injectors: Upgrade to larger injectors (e.g., 1000cc) to meet fuel demands.
- Fuel Pump: A high-flow fuel pump (e.g., DW300) ensures adequate fuel supply.
Engine Internals
To handle the increased power, upgrading engine internals is crucial. Recommended modifications include:
- Pistons: Forged pistons for increased strength.
- Connecting Rods: Upgrading to forged rods can prevent failure under high stress.
- Crankshaft: A forged crankshaft can handle higher RPMs and power levels.
Exhaust System
An efficient exhaust system reduces back pressure and allows for better airflow. Consider these upgrades:
- Cat-Back Exhaust: A performance cat-back system improves sound and flow.
- Downpipe: A high-flow downpipe is essential for maximizing turbo performance.
Intake System
A high-performance intake system can improve airflow to the engine. Recommended upgrades include:
- Cold Air Intake: A cold air intake system increases airflow and reduces intake temperatures.
- Turbo Inlet Pipe: Upgrading the inlet pipe can improve turbo response.
Tuning for Maximum Performance
After completing the necessary modifications, proper tuning is essential to achieve optimal performance and reliability. A professional tuner can adjust the engine management system to ensure all components work harmoniously.
- ECU Remapping: Adjusts fuel maps and timing for increased performance.
- Dyno Tuning: Provides real-time data to fine-tune settings for maximum power.
Conclusion
Building a 500+ HP Subaru WRX requires careful planning and execution of turbocharger upgrades and supporting modifications. By selecting the right components and ensuring proper tuning, you can transform your WRX into a powerful machine that delivers exhilarating performance on the road or track.