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The Dodge Challenger 5.7 HEMI is a powerhouse in its own right, but with the right modifications, it can transform into a beast that produces over 600 horsepower. In this article, we will explore the process of building a turbocharged Dodge Challenger using Garrett GT28 turbos, detailing the necessary steps, parts, and considerations for achieving this impressive power output.
Understanding the HEMI Engine
The 5.7 HEMI engine is known for its unique design and performance capabilities. It features a hemispherical combustion chamber, which allows for better airflow and more efficient combustion. This engine is a great candidate for turbocharging due to its robust construction and ability to handle increased power.
Choosing the Right Turbochargers
Garrett GT28 turbos are popular choices for those looking to boost their performance. These turbos are known for their quick spool time and efficiency, making them ideal for a street-driven vehicle. Here are some key points to consider when selecting your turbos:
- Size: Ensure the turbos are appropriately sized for your power goals.
- Material: Look for durable materials that can withstand high temperatures.
- Wastegate: Choose an internal or external wastegate based on your setup.
Essential Parts for the Build
To achieve 600+ horsepower, you will need several key components in addition to the turbos. Below is a list of essential parts for the build:
- Upgraded fuel injectors
- High-flow fuel pump
- Intercooler
- Turbo manifold
- Exhaust system
- Tuning software
Installation Process
The installation of the Garrett GT28 turbos on your Dodge Challenger requires careful planning and execution. Here’s a step-by-step guide to help you through the process:
Step 1: Prepare the Engine Bay
Begin by cleaning the engine bay and removing any components that may obstruct the installation of the turbos. This includes the intake manifold and any other accessories that may be in the way.
Step 2: Install the Turbo Manifold
Once the engine bay is clear, install the turbo manifold. Make sure to use new gaskets to prevent any leaks. Secure the manifold to the engine block and ensure it is tight.
Step 3: Mount the Turbos
Next, mount the Garrett GT28 turbos onto the manifold. Ensure that they are positioned correctly for optimal airflow and accessibility for maintenance.
Step 4: Install the Intercooler
Install the intercooler in front of the radiator to maximize airflow. Connect the piping from the turbos to the intercooler, ensuring all connections are secure and leak-free.
Step 5: Upgrade Fuel System
Upgrade the fuel injectors and install the high-flow fuel pump. This is crucial to provide enough fuel for the increased horsepower. Ensure that all connections are tight and that there are no leaks.
Step 6: Tune the Engine
After all components are installed, it’s time to tune the engine. Use tuning software to adjust the air-fuel ratio and ignition timing to ensure optimal performance and reliability.
Testing and Fine-Tuning
Once the installation is complete, it’s important to test the vehicle to ensure everything is functioning properly. Here are some tips for testing and fine-tuning your build:
- Monitor boost levels and adjust the wastegate as necessary.
- Check for any leaks in the intake and exhaust systems.
- Perform a dyno test to measure horsepower and torque.
Maintaining Your Turbocharged Challenger
Maintaining a turbocharged engine is crucial for longevity and performance. Here are some maintenance tips to keep your Dodge Challenger running smoothly:
- Regularly check oil levels and change the oil frequently.
- Inspect the turbochargers for any signs of wear or damage.
- Keep an eye on the intercooler and piping for leaks or blockages.
Conclusion
Building a turbocharged Dodge Challenger 5.7 HEMI with Garrett GT28 turbos is an exciting project that can yield impressive results. With careful planning, the right components, and proper tuning, you can achieve over 600 horsepower and enjoy an exhilarating driving experience. Always remember to prioritize maintenance to keep your build in top condition.