Upgrading to a Compound Garrett Gt55 and Ht3b Turbo System on Duramax: What You Need to Know

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Upgrading to a compound turbo system can significantly enhance the performance of your Duramax engine. The Garrett GT55 and HT3B turbo system is a popular choice among enthusiasts seeking increased power and efficiency. This article will guide you through the essential aspects of this upgrade, including its benefits, installation process, and considerations.

Benefits of Upgrading to a Compound Turbo System

Installing a compound turbo system like the Garrett GT55 and HT3B can provide numerous advantages over a single turbo setup. Here are some of the key benefits:

  • Increased Power Output: The combination of the two turbos allows for higher boost levels, resulting in more horsepower and torque.
  • Improved Efficiency: Compound systems can operate more efficiently at various RPM ranges, providing better throttle response.
  • Lower EGTs: By spreading the load between two turbos, exhaust gas temperatures (EGTs) can be reduced, which helps protect the engine.
  • Enhanced Tuning Options: The flexibility of a compound system allows for more tuning possibilities to suit your performance goals.

Components of the Garrett GT55 and HT3B Turbo System

Understanding the components of the Garrett GT55 and HT3B turbo system is crucial for a successful upgrade. Here’s a breakdown of the main parts involved:

  • Garrett GT55 Turbo: This large turbocharger is designed for high power applications, capable of supporting significant horsepower.
  • HT3B Turbo: A smaller turbo that works in conjunction with the GT55 to provide quick spool-up and improved low-end torque.
  • Turbo Mounting Kit: Essential for securely mounting the turbos to the engine and ensuring proper alignment.
  • Intercooler: A high-performance intercooler is necessary to cool the compressed air from the turbos before it enters the engine.
  • Exhaust Manifold: A suitable manifold is required to accommodate the new turbo configuration and optimize exhaust flow.
  • Oil Lines: Proper oil supply and return lines are crucial for the lubrication of the turbos.

Installation Process

Installing the Garrett GT55 and HT3B turbo system requires careful planning and execution. Here’s a general overview of the installation process:

  • Preparation: Gather all necessary tools and parts before beginning the installation. Ensure the vehicle is on a level surface and securely raised.
  • Remove Existing Turbo: Disconnect and remove the factory turbo and related components from the engine.
  • Install Exhaust Manifold: Install the new exhaust manifold that is compatible with the Garrett GT55 and HT3B turbos.
  • Mount Turbos: Securely mount both the GT55 and HT3B turbos using the provided mounting kit.
  • Connect Oil Lines: Attach the oil supply and return lines to ensure proper lubrication for both turbos.
  • Install Intercooler: Position the intercooler and connect it to the intake piping leading to the engine.
  • Reassemble Components: Reinstall any other components that were removed during the process, including piping and electrical connections.
  • Check for Leaks: Once everything is installed, check all connections for leaks before starting the engine.

Considerations Before Upgrading

Before upgrading to a compound turbo system, there are several considerations to keep in mind to ensure a successful installation and operation:

  • Engine Condition: Ensure that your Duramax engine is in good condition and capable of handling the increased power output.
  • Supporting Modifications: Consider additional modifications such as upgraded fuel injectors, a stronger transmission, and improved cooling systems.
  • Tuning Requirements: A proper tune is essential for maximizing performance and ensuring the longevity of the engine after the upgrade.
  • Budget: Factor in the costs of the turbo system, installation, and any additional modifications needed.

Conclusion

Upgrading to a compound Garrett GT55 and HT3B turbo system can significantly boost the performance of your Duramax engine. By understanding the benefits, components, installation process, and considerations, you can make an informed decision about this upgrade. With the right preparation and modifications, you can enjoy increased power and efficiency on your Duramax.