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The Subaru WRX is a beloved vehicle among car enthusiasts, especially those who enjoy tuning and upgrading their cars for better performance. One of the most popular upgrades for the WRX is the turbocharger. Many enthusiasts choose to install Garrett or Precision turbo kits to enhance their vehicle’s performance. However, these upgrades can sometimes lead to issues that can be frustrating to troubleshoot. In this article, we will explore common problems associated with Garrett and Precision turbo kits and provide guidance on how to address them.
Understanding Turbocharger Upgrades
Upgrading the turbocharger is one of the most effective ways to increase the horsepower and torque of your WRX. Turbochargers force more air into the engine, allowing for more fuel to be burned and thus increasing power output. However, the process of upgrading a turbocharger is not without its challenges. Understanding the common issues that can arise is essential for a successful upgrade.
Common Issues with Garrett Turbo Kits
- Boost Leaks
- Oil Supply Problems
- Wastegate Malfunction
- Turbo Lag
- Excessive Exhaust Smoke
Boost Leaks
One of the most common issues with Garrett turbo kits is boost leaks. These leaks can occur in various areas, including the intake piping, intercooler, and throttle body. A boost leak can lead to reduced performance and can make tuning the vehicle more challenging.
Oil Supply Problems
Proper oil supply is critical for the longevity of the turbocharger. If the oil lines are not installed correctly or if there is a blockage, it can lead to turbo failure. Regularly checking the oil supply and ensuring the lines are free of obstructions is essential.
Wastegate Malfunction
The wastegate is responsible for regulating boost pressure. If the wastegate is stuck or malfunctioning, it can lead to overboosting or underboosting, both of which can cause engine damage. It’s important to check the wastegate operation regularly.
Turbo Lag
Turbo lag can be frustrating for drivers, as it causes a delay in power delivery when accelerating. This can be caused by several factors, including the size of the turbocharger and the tuning of the engine. Proper tuning and possibly upgrading to a smaller turbo can help mitigate lag.
Excessive Exhaust Smoke
If you notice excessive smoke coming from your exhaust, it could be a sign of a failing turbocharger. This can occur due to oil leaking into the exhaust system. Regular inspections and maintenance can help identify such issues before they lead to significant damage.
Common Issues with Precision Turbo Kits
- Boost Control Issues
- Intercooler Failures
- Fuel Delivery Problems
- Noise and Vibration
- Installation Errors
Boost Control Issues
Precision turbo kits often come with advanced boost control systems. However, if these systems are not calibrated correctly, it can lead to inconsistent boost levels. Regularly checking and calibrating the boost control system is vital for optimal performance.
Intercooler Failures
Intercoolers are essential for reducing the temperature of the air entering the engine. If the intercooler fails, it can lead to increased intake temperatures and reduced performance. Inspecting the intercooler for leaks or damage is crucial after installation.
Fuel Delivery Problems
Upgrading the turbo often requires upgrades to the fuel system as well. If the fuel pump or injectors are not adequate for the increased demand, it can lead to lean conditions and potential engine damage. Ensure that your fuel system is compatible with your turbo upgrade.
Noise and Vibration
Unusual noises or vibrations can indicate a problem with the turbo installation or the turbo itself. It is essential to investigate any abnormal sounds immediately, as they can signal serious issues that could lead to turbo failure.
Installation Errors
Improper installation is a common issue that can lead to many of the problems mentioned above. It is crucial to follow the manufacturer’s instructions carefully and ensure that all components are installed correctly to avoid future headaches.
Troubleshooting Steps
Troubleshooting turbocharger issues can be daunting, but following a systematic approach can help. Here are some steps to consider:
- Check for boost leaks using a smoke test.
- Inspect oil lines for blockages and ensure proper flow.
- Test the wastegate functionality.
- Monitor boost levels during acceleration.
- Inspect the intercooler for any signs of damage.
- Verify fuel system compatibility.
- Listen for unusual noises and vibrations.
- Review installation instructions to ensure compliance.
Conclusion
Upgrading to a Garrett or Precision turbo kit can significantly enhance the performance of your Subaru WRX. However, it’s essential to be aware of the common issues that can arise and how to troubleshoot them effectively. By following the tips outlined in this article, you can ensure that your turbo upgrade is a success and enjoy the thrilling performance that your WRX is capable of delivering.