The Ultimate List of Internal Upgrades for a 500+ Hp Wrx Built Engine

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The Subaru WRX is a beloved performance vehicle, known for its rally heritage and turbocharged power. For enthusiasts looking to push their WRX beyond 500 horsepower, a series of internal upgrades is essential. In this article, we will explore the ultimate list of internal upgrades that can help you achieve that goal.

Understanding Engine Components

Before diving into specific upgrades, it’s crucial to understand the key components of your WRX engine. Each part plays a vital role in performance and reliability.

  • Pistons: The heart of the engine, responsible for compressing the air-fuel mixture.
  • Connecting Rods: Connect the pistons to the crankshaft, transferring power.
  • Cylinder Head: Contains valves and camshafts, critical for air intake and exhaust.
  • Crankshaft: Converts linear motion from pistons into rotational motion.
  • Turbocharger: Increases air intake for more power.

Essential Internal Upgrades

To achieve over 500 horsepower, specific internal upgrades are necessary. Below is a list of the most effective enhancements.

  • Forged Pistons: Upgrading to forged pistons can handle higher boost levels and prevent failure under stress.
  • Upgraded Connecting Rods: Stronger rods can withstand increased power and RPMs, reducing the risk of bending.
  • Aftermarket Cylinder Heads: High-flow cylinder heads improve airflow, enhancing combustion efficiency.
  • High-Performance Camshafts: Upgrading camshafts can optimize valve timing for better performance at high RPMs.
  • Crankshaft Upgrade: A forged crankshaft can handle the increased power and torque without flexing.
  • Upgraded Turbocharger: A larger turbo can provide the necessary airflow to achieve higher horsepower levels.
  • Intercooler Upgrade: A high-performance intercooler helps maintain optimal air temperatures, improving efficiency.
  • Fuel System Upgrade: Larger fuel injectors and a high-flow fuel pump ensure adequate fuel delivery.
  • Engine Management System: A standalone ECU allows for precise tuning to maximize performance.

Additional Considerations

While the internal upgrades are crucial, several additional factors can influence your WRX’s performance and reliability.

  • Cooling System: An upgraded cooling system is vital to prevent overheating during high-performance driving.
  • Exhaust System: A free-flowing exhaust can enhance turbo efficiency and reduce back pressure.
  • Transmission Upgrades: Strengthening the transmission is necessary to handle increased power and torque.
  • Suspension and Brakes: Upgrading suspension and brakes ensures better handling and stopping power.

Conclusion

Achieving over 500 horsepower in a WRX requires careful planning and the right upgrades. By focusing on essential internal components and considering additional systems, you can build a powerful and reliable engine that delivers exhilarating performance on the road or track.