6.4 Hemi Cam Upgrade for Street and Track: Power, Sound, and Driveability

by

The 6.4 HEMI engine is known for its power and performance, but enthusiasts often seek to enhance its capabilities further. One of the most effective upgrades is the camshaft. This article explores the benefits of a cam upgrade, focusing on power, sound, and driveability for both street and track applications.

Understanding the 6.4 HEMI Engine

The 6.4 HEMI engine, also known as the 392 HEMI, is a formidable powerplant that delivers impressive horsepower and torque. With a robust design and advanced technology, it serves as an excellent foundation for performance upgrades.

Key Features of the 6.4 HEMI

  • 6.4-liter V8 engine
  • High-performance aluminum block
  • Variable valve timing (VVT)
  • Multi-displacement system (MDS)

Benefits of a Cam Upgrade

Upgrading the camshaft in a 6.4 HEMI can provide several advantages that enhance performance and driving experience. Here are the primary benefits:

  • Increased Horsepower: A performance cam can significantly boost horsepower by optimizing airflow.
  • Improved Torque: Enhanced torque delivery across the RPM range is crucial for both street and track performance.
  • Unique Sound: A cam upgrade can give your engine a more aggressive and distinctive sound.
  • Better Throttle Response: Improved cam profile can lead to quicker throttle response, making the car feel more alive.

Selecting the Right Camshaft

Choosing the right camshaft for your 6.4 HEMI is essential to achieve the desired performance. Factors to consider include:

  • Intended Use: Determine if the cam will be used primarily for street driving, track racing, or a combination of both.
  • Lift and Duration: Higher lift and longer duration can increase performance but may affect drivability.
  • Idle Characteristics: Consider how the cam will affect idle quality and engine responsiveness.
  • Compatibility: Ensure the cam is compatible with other modifications and engine components.

Several camshaft options are popular among 6.4 HEMI enthusiasts. Here are a few notable choices:

  • Comp Cams Stage 2: Known for its balance between street and track performance.
  • Mopar Performance Cam: A factory option that provides a good mix of power and reliability.
  • Texas Speed Cam: Offers aggressive profiles for maximum performance on the track.
  • Hughes Engines Cam: Designed for high RPM performance and excellent throttle response.

Installation Considerations

Installing a new camshaft in your 6.4 HEMI requires careful planning and execution. Here are some key considerations:

  • Tools Required: Ensure you have the necessary tools, including a torque wrench and camshaft alignment tool.
  • Timing Chain Replacement: It is often recommended to replace the timing chain during cam installation.
  • Professional Help: If you are not experienced, consider hiring a professional to perform the installation.
  • Tuning: After installation, a proper tune is essential to maximize performance and drivability.

Effects on Driveability

While a cam upgrade can enhance power and sound, it is crucial to consider how it affects driveability. Here are some factors to keep in mind:

  • Idle Quality: More aggressive cams can lead to a rougher idle, which may not be ideal for daily driving.
  • Low-End Torque: Some cam profiles may sacrifice low-end torque for higher RPM power.
  • Fuel Economy: Performance cams can impact fuel economy, especially in city driving conditions.
  • Daily Use: Consider how often you will be using the vehicle for daily driving versus performance driving.

Conclusion

Upgrading the camshaft in a 6.4 HEMI engine can unlock significant performance enhancements, providing increased power, a unique sound, and improved driveability. By carefully selecting the right cam and considering installation and driveability factors, enthusiasts can enjoy the best of both worlds on the street and the track.