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The 426 HEMI engine is an iconic powerhouse known for its performance and potential. Achieving power targets of 600+ horsepower requires careful selection of camshaft and valve train upgrades. This article explores the best options available to enhance the performance of your 426 HEMI.
Understanding the 426 HEMI Engine
The 426 HEMI, originally introduced in the 1960s, has become a favorite among performance enthusiasts. Its unique hemispherical combustion chamber design allows for increased airflow and higher compression ratios, making it an ideal candidate for performance modifications.
Key Factors for Upgrades
When aiming for 600+ horsepower, several factors must be considered in your camshaft and valve train upgrades:
- Engine displacement and configuration
- Intended use (street, track, or racing)
- Compatibility with existing components
- Desired power band and RPM range
Best Camshaft Options
Selecting the right camshaft is crucial for achieving your horsepower goals. Here are some of the best camshaft options for the 426 HEMI:
- Comp Cams Xtreme Energy: Offers a great balance of performance and drivability, suitable for street and strip use.
- Hughes Engines Camshaft: Known for high lift and duration, perfect for maximizing airflow at higher RPMs.
- Mopar Performance Cam: Designed specifically for the HEMI, providing a solid increase in horsepower while maintaining reliability.
Valve Train Upgrades
Upgrading the valve train is essential to support the increased lift and duration of a performance camshaft. Here are the top valve train upgrades to consider:
- High-Performance Valve Springs: Stiffer springs prevent valve float at high RPMs, ensuring better performance.
- Retainers and Locks: Lightweight retainers and locks reduce valvetrain mass, allowing for quicker response times.
- Pushrods: Upgraded pushrods provide increased strength and reduced flex, crucial for high-performance applications.
Installation Considerations
Proper installation of camshafts and valve train components is critical for performance and longevity. Consider the following:
- Use a professional mechanic with experience in HEMI engines.
- Ensure all components are compatible and properly aligned.
- Follow manufacturer specifications for torque settings and clearances.
Tuning for Maximum Performance
After upgrading your camshaft and valve train, tuning is essential to unlock the full potential of your 426 HEMI. A custom tune can help optimize fuel delivery, ignition timing, and overall performance.
Conclusion
Achieving 600+ horsepower from a 426 HEMI is an exciting challenge that requires the right camshaft and valve train upgrades. By carefully selecting components and ensuring proper installation and tuning, you can unleash the full potential of this legendary engine.