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The 6.4 HEMI engine has become a favorite among performance enthusiasts, known for its robust design and potential for significant horsepower gains. This article explores documented builds that push the 6.4 HEMI past the 600 horsepower mark using custom camshafts and supporting modifications.
Understanding the 6.4 HEMI Engine
The 6.4 HEMI, also known as the 392 HEMI, is a powerful V8 engine that offers a solid foundation for performance upgrades. It features a 6.4-liter displacement, a DOHC design, and advanced technology that enhances power delivery and efficiency.
- Displacement: 6.4 liters
- Horsepower: 485 stock
- Torque: 475 lb-ft stock
Custom Camshaft Upgrades
One of the most effective ways to increase horsepower in the 6.4 HEMI is through the installation of a custom camshaft. A performance camshaft alters the timing and lift of the engine’s valves, allowing for better airflow and increased power output.
Choosing the Right Camshaft
When selecting a camshaft for your 6.4 HEMI build, consider the following factors:
- Lift: Higher lift can improve airflow.
- Duration: Longer duration can enhance performance at higher RPMs.
- Overlap: More overlap can improve high-end power but may sacrifice low-end torque.
Supporting Modifications for Maximum Performance
To achieve over 600 horsepower, additional modifications are necessary beyond just a camshaft upgrade. These supporting mods help optimize the engine’s performance and reliability.
Intake System Upgrades
Improving the intake system is crucial for maximizing airflow into the engine. Consider upgrading to a high-performance cold air intake and a larger throttle body.
Exhaust System Enhancements
A free-flowing exhaust system can significantly reduce back pressure and improve engine efficiency. Upgrading to long tube headers and a high-performance cat-back exhaust system is recommended.
Tuning and Engine Management
After making significant modifications, proper tuning is essential to ensure the engine runs efficiently and safely. A custom tune can optimize fuel delivery, ignition timing, and overall performance.
Documented Builds Over 600 HP
Several documented builds have successfully broken the 600 horsepower barrier with the 6.4 HEMI. Here are a few notable examples:
- Build 1: Custom cam, long tube headers, cold air intake, and a custom tune achieved 620 hp.
- Build 2: Stage 2 camshaft, upgraded fuel injectors, and a high-flow exhaust system reached 650 hp.
- Build 3: Supercharger installation with a custom cam and supporting mods resulted in 700 hp.
Conclusion
The 6.4 HEMI engine is a powerful platform for performance builds, and with the right modifications, it can easily exceed 600 horsepower. Custom camshafts and supporting mods play a vital role in achieving these impressive power levels. Whether you’re a seasoned enthusiast or just starting, understanding these upgrades can help you unlock the full potential of your 6.4 HEMI.