Diy Turbo Upgrade for Subaru Wrx: Step-by-step Guide to 100+ Real-world Power Gains

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The Subaru WRX is a beloved vehicle among car enthusiasts, known for its performance and rally heritage. One of the most effective ways to enhance its power is through a turbo upgrade. In this guide, we will walk you through the steps necessary to achieve over 100 real-world power gains with a DIY turbo upgrade.

Understanding the Basics of Turbocharging

Turbocharging is a forced induction method that uses exhaust gases to spin a turbine, which compresses the intake air. This process allows for more air and fuel to enter the engine, resulting in increased power output. Here are some key components to understand:

  • Turbine: The component that is driven by exhaust gases.
  • Compressor: The part that compresses the intake air.
  • Wastegate: A valve that controls exhaust flow to the turbine.
  • Intercooler: A device that cools the compressed air before it enters the engine.

Tools and Materials Needed

Before starting your turbo upgrade, gather the following tools and materials:

  • Socket set
  • Wrenches
  • Screwdrivers
  • Torque wrench
  • New turbocharger
  • Intercooler (if upgrading)
  • New piping and hoses
  • Oil and coolant
  • Gaskets and seals
  • Boost gauge

Step-by-Step Installation Guide

Step 1: Prepare Your Vehicle

Start by parking your Subaru WRX on a flat surface and disconnect the battery. This will ensure safety while working on the electrical components.

Step 2: Remove the Old Turbocharger

Carefully remove the intake and exhaust components connected to the stock turbo. Follow these sub-steps:

  • Detach the intake piping from the turbo.
  • Disconnect the wastegate actuator.
  • Remove the oil and coolant lines.
  • Unbolt the turbo from the exhaust manifold.

Step 3: Install the New Turbocharger

Once the old turbo is removed, it’s time to install the new turbocharger:

  • Place the new turbo onto the exhaust manifold and secure it with bolts.
  • Reconnect the oil and coolant lines, ensuring there are no leaks.
  • Attach the wastegate actuator.
  • Connect the intake piping to the new turbo.

Step 4: Upgrade the Intercooler (Optional)

If you’re upgrading your turbo, consider upgrading the intercooler as well:

  • Remove the stock intercooler.
  • Install the new intercooler using the provided brackets.
  • Connect the new piping to the intercooler and the turbo.

Step 5: Check All Connections

Before starting the engine, double-check all connections for tightness and proper fit. This includes:

  • Turbo connections
  • Intercooler piping
  • Oil and coolant lines
  • Electrical connections

Step 6: Reconnect the Battery and Start the Engine

Reconnect the battery and start your WRX. Let the engine idle for a few minutes while checking for any leaks or issues. Monitor the boost gauge to ensure everything is functioning correctly.

Tuning Your WRX for Maximum Performance

After the turbo upgrade, it’s essential to tune your WRX to maximize performance and ensure engine safety. Here are some tuning options:

  • ECU Reflash: Update the engine’s computer settings to accommodate the new turbo.
  • Standalone ECU: Consider a standalone system for advanced tuning capabilities.
  • Dyno Tuning: Take your WRX to a professional for a dyno tune to optimize performance.

Real-World Power Gains

With a successful turbo upgrade and proper tuning, many WRX owners report power gains exceeding 100 horsepower. This enhancement not only improves acceleration but also enhances overall driving experience.

Common Issues and Troubleshooting

While upgrading your turbo can be rewarding, some common issues may arise:

  • Boost Leaks: Check all connections for leaks that could reduce performance.
  • Overheating: Monitor engine temperatures to prevent damage.
  • Check Engine Light: Address any error codes that may appear post-installation.

Conclusion

A DIY turbo upgrade for your Subaru WRX can lead to significant power gains and an exhilarating driving experience. By following this step-by-step guide, you can successfully enhance your vehicle’s performance while enjoying the satisfaction of working on your car. Remember to tune your WRX properly and address any potential issues to fully enjoy your upgraded ride.