Hemi Mds Delete for 600+ Hp: Building the Ultimate 5.7l and 6.4l Combos

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Hemi MDS Delete for 600+ HP: Building the Ultimate 5.7L and 6.4L Combos

The Hemi engine has gained a reputation for its power and performance, especially when tuned for high horsepower applications. For enthusiasts looking to push their 5.7L and 6.4L Hemi engines beyond the 600 horsepower mark, the MDS (Multi-Displacement System) delete is a crucial modification. This article will explore the benefits of an MDS delete and how to build the ultimate Hemi combos for maximum power.

Understanding the HEMI MDS System

The MDS system is designed to improve fuel efficiency by deactivating half of the engine’s cylinders under light load conditions. While this feature can save fuel, it can also limit performance when maximum power is desired. Removing the MDS allows for a more consistent power delivery and can contribute to higher horsepower numbers.

Benefits of MDS Delete

  • Increased Power: Eliminating the MDS allows the engine to utilize all cylinders at all times, leading to improved throttle response and power output.
  • Better Tuning: With MDS removed, tuning becomes more straightforward, allowing for more aggressive performance strategies.
  • Improved Reliability: The MDS system can introduce potential failure points; removing it can enhance overall engine reliability.
  • Enhanced Sound: The exhaust note becomes more aggressive, providing a more satisfying driving experience.

Preparing for the MDS Delete

Before diving into the MDS delete process, proper preparation is essential. Here’s what you need to consider:

  • Tools Required: Ensure you have the necessary tools, including socket sets, wrenches, and an OBD-II scanner for tuning.
  • Parts Needed: You will need an MDS delete kit, which typically includes plugs for the lifter valleys and tuning software.
  • Knowledge Base: Familiarize yourself with engine disassembly and reassembly procedures to avoid mistakes.

Steps for MDS Delete

Performing an MDS delete requires careful attention to detail. Below are the general steps to complete the process:

  • Disconnect Battery: Always start by disconnecting the negative terminal of the battery to prevent electrical shorts.
  • Remove Intake Manifold: Carefully detach the intake manifold to access the lifter valley.
  • Remove MDS Lifters: Take out the MDS lifters and replace them with non-MDS lifters included in your delete kit.
  • Install Plugs: Insert the provided plugs into the lifter valley to seal off the MDS passages.
  • Reassemble: Reinstall the intake manifold and reconnect all components.
  • Tune the ECU: Use your tuning software to disable MDS functionality in the engine control unit.

Building the Ultimate 5.7L and 6.4L Combos

Once the MDS delete is complete, it’s time to focus on building a high-performance engine combo. Here are some recommendations for both the 5.7L and 6.4L Hemi engines:

5.7L Hemi Performance Upgrades

  • Cold Air Intake: Upgrading to a high-performance cold air intake system can improve airflow and engine efficiency.
  • High-Performance Camshaft: Consider installing a camshaft designed for high horsepower to enhance engine performance.
  • Headers and Exhaust: Long-tube headers and a full exhaust system can significantly increase horsepower and torque.
  • Supercharger: For those looking to exceed 600 hp, a supercharger can provide the necessary boost.

6.4L Hemi Performance Upgrades

  • High-Performance Intake Manifold: Upgrading to a performance intake manifold can improve airflow and power output.
  • Performance Tuning: Custom tuning is essential to maximize the potential of the 6.4L engine.
  • Fuel System Upgrade: Ensure your fuel system can support higher horsepower with larger injectors and a high-flow fuel pump.
  • Forced Induction: Turbocharging or supercharging the 6.4L can easily push power levels beyond 600 hp.

Tuning for Maximum Performance

After completing the MDS delete and installing performance upgrades, tuning is crucial to ensure the engine runs efficiently and safely at high power levels. Here are some tuning tips:

  • Use a Professional Tuner: Hiring a professional tuner with experience in Hemi engines can yield the best results.
  • Monitor Air-Fuel Ratios: Ensure your air-fuel ratios are optimal for performance and engine health.
  • Check for Knock: Monitor for any signs of knock or detonation during tuning to prevent engine damage.
  • Data Logging: Utilize data logging to track engine performance and make adjustments as needed.

Conclusion

Performing an MDS delete on your 5.7L or 6.4L Hemi engine is a vital step for those looking to achieve over 600 horsepower. By following the outlined steps and focusing on performance upgrades, you can build a powerful and reliable engine combo. Remember that tuning is essential to harness the full potential of your modifications, ensuring your engine performs at its best.