Supporting Mods for 700+ Hp Hemi Builds: Camshafts from Comp Cams and Upgraded Valve Springs

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The HEMI engine has long been a favorite among performance enthusiasts, especially when it comes to building high horsepower setups. Achieving over 700 horsepower from a HEMI requires not just a powerful engine block, but also a series of supporting modifications that enhance performance and reliability. In this article, we will focus on two critical components: camshafts from COMP Cams and upgraded valve springs.

Understanding the Importance of Supporting Mods

When pushing an engine to its limits, it is essential to ensure that all components work harmoniously. Supporting mods play a vital role in maintaining engine health and maximizing performance. For HEMI builds targeting 700+ horsepower, the following aspects are crucial:

  • Improved airflow
  • Enhanced valve control
  • Increased RPM capability

Camshafts from COMP Cams

COMP Cams is renowned for producing high-performance camshafts that cater to various engine setups. When selecting a camshaft for a 700+ HP HEMI build, consider the following factors:

  • Duration: Longer duration can improve high RPM performance but may sacrifice low-end torque.
  • Lobe Separation Angle: A wider angle can enhance idle quality and vacuum, while a narrower angle can increase performance at high RPMs.
  • Lift: Higher lift can increase airflow but requires compatible valve springs and other supporting mods.

Several camshaft options from COMP Cams are popular among HEMI enthusiasts looking to achieve high horsepower numbers. Here are a few noteworthy choices:

  • COMP Cams XFI Series: Designed for maximum performance, offering excellent throttle response and power throughout the RPM range.
  • COMP Cams Magnum Series: Known for its aggressive profile and ability to produce substantial horsepower, especially in high RPM scenarios.
  • COMP Cams Stage 2 HEMI Cam: A great balance of power and drivability, suitable for street and strip applications.

Upgraded Valve Springs

Complementing your camshaft choice with upgraded valve springs is crucial for achieving optimal performance. Stock valve springs may not handle the increased lift and RPMs associated with high-performance camshafts. Here’s what to consider when selecting valve springs:

  • Spring Rate: Higher spring rates can prevent valve float at high RPMs, ensuring consistent performance.
  • Installed Height: Ensure the springs fit properly within the engine’s specifications to avoid installation issues.
  • Material: Look for high-quality materials that can withstand the rigors of high-performance applications.

Several brands offer high-performance valve springs tailored for HEMI builds. Here are some top recommendations:

  • COMP Cams Beehive Springs: These springs provide excellent stability and are lightweight, reducing overall valvetrain stress.
  • Mopar Performance Valve Springs: Designed specifically for HEMI applications, ensuring compatibility and reliability.
  • PAC Racing Springs: Known for their performance in high RPM applications, offering a great balance of strength and weight.

Installation Considerations

Proper installation of camshafts and valve springs is essential for achieving the desired performance. Here are some key points to keep in mind:

  • Follow Manufacturer Instructions: Always adhere to the guidelines provided by the camshaft and valve spring manufacturers.
  • Check Clearances: Ensure there is adequate clearance between the camshaft, valves, and piston to prevent interference.
  • Use Quality Tools: Invest in quality tools to avoid damaging components during installation.

Tuning for Maximum Performance

After installing your camshaft and upgraded valve springs, tuning the engine is critical to extracting maximum performance. A proper tune can optimize fuel delivery, ignition timing, and overall engine efficiency. Consider the following:

  • Dyno Tuning: Utilize a dynamometer to fine-tune your engine’s performance and ensure it’s running at its best.
  • ECU Adjustments: Make necessary adjustments to the engine control unit to accommodate the new components.
  • Monitor Performance: Keep an eye on engine metrics to ensure everything is functioning correctly after modifications.

Conclusion

Building a 700+ HP HEMI engine requires careful consideration of supporting mods, particularly camshafts and valve springs. By selecting the right components from reputable manufacturers like COMP Cams and ensuring proper installation and tuning, you can achieve impressive horsepower while maintaining engine reliability. With the right setup, your HEMI can deliver exhilarating performance both on the street and the track.