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The Dodge Challenger 5.7 HEMI is a powerful car in its own right, but for those looking to push the limits of performance, transforming it into a supercharged beast is the ultimate goal. This article will guide you through the steps necessary to elevate your Challenger to over 650 horsepower, making it a true powerhouse on the road.
Understanding the HEMI Engine
The HEMI engine is known for its distinct hemispherical combustion chambers, which allow for greater airflow and efficiency. This design is what gives the HEMI its unique power characteristics. The 5.7-liter variant is a popular choice for many muscle car enthusiasts.
Key Features of the 5.7 HEMI Engine
- Hemispherical combustion chambers for improved airflow
- Variable valve timing for better performance
- Robust construction for high horsepower applications
Initial Modifications
Before adding a supercharger, it’s essential to prepare your engine for the increased power. This involves several key modifications that will ensure your engine can handle the extra stress.
Upgrading the Exhaust System
One of the first modifications to consider is upgrading the exhaust system. A high-performance exhaust will reduce back pressure and improve engine efficiency.
- Install long-tube headers for better exhaust flow
- Choose a cat-back exhaust system for improved sound and performance
Improving Air Intake
Next, consider upgrading the air intake system. A high-flow air intake will allow your engine to breathe better, which is crucial when adding forced induction.
- Install a cold air intake system
- Replace the factory air filter with a high-performance option
Choosing the Right Supercharger
When it comes to supercharging your Dodge Challenger, there are several options available. The right choice depends on your performance goals and budget.
Types of Superchargers
- Roots Supercharger: Offers instant power and torque
- Centifugal Supercharger: Provides a linear power increase and is more efficient at higher RPMs
- Twin-Screw Supercharger: Combines the benefits of both Roots and Centrifugal designs
Recommended Supercharger Kits
Here are a few popular supercharger kits that can help you achieve over 650 horsepower:
- Whipple Supercharger Kit
- Procharger Supercharger Kit
- Edelbrock Supercharger Kit
Installing the Supercharger
Once you’ve selected the right supercharger kit, the installation process begins. This can be a complex task, so having a professional install it is recommended unless you are experienced with automotive work.
Installation Steps
- Remove the factory intake system and exhaust components
- Install the supercharger according to the manufacturer’s instructions
- Reinstall any components that were removed
- Connect the necessary hoses and wiring
Tuning Your Challenger
After the supercharger installation, tuning is essential to ensure your engine runs smoothly and efficiently. A proper tune will optimize your air-fuel mixture and ignition timing for the new power levels.
Choosing a Tuning Method
- ECU Reflash: A software update to your engine control unit
- Standalone Engine Management System: Offers advanced tuning options
Final Touches and Considerations
With your Dodge Challenger now supercharged, it’s time to consider a few final touches that will enhance performance and reliability.
Upgrading the Fuel System
A higher horsepower engine requires more fuel. Upgrading your fuel injectors and fuel pump will ensure your engine gets the necessary fuel supply.
- Install high-flow fuel injectors
- Upgrade to a performance fuel pump
Enhancing Cooling Systems
Increased power can lead to higher engine temperatures. Consider upgrading your cooling system to prevent overheating.
- Install a high-performance radiator
- Add an oil cooler
Conclusion
Transforming your Dodge Challenger 5.7 HEMI into a 650+ horsepower beast is an exciting journey that requires careful planning and execution. By following these steps and making the right modifications, you can unleash the full potential of your muscle car. Enjoy the thrill of the ride!