Table of Contents
The Hemi MDS (Multi-Displacement System) is designed to improve fuel efficiency by deactivating half of the engine’s cylinders under light load conditions. However, for performance enthusiasts aiming for a robust 550 horsepower build, removing this system can provide significant advantages. This guide will walk you through the step-by-step process of performing a Hemi MDS delete.
Understanding Hemi MDS
The Hemi MDS utilizes advanced technology to enhance fuel economy. While this is beneficial for daily driving, it can hinder performance in high-powered builds. By eliminating the MDS, you can achieve more consistent power delivery and improved throttle response.
Tools and Materials Needed
- Socket set
- Torque wrench
- Hemi MDS delete kit
- New gaskets
- Engine oil
- Shop towels
- Safety glasses
- Gloves
Step-by-Step Installation Guide
Step 1: Preparation
Before starting the installation, ensure your vehicle is parked on a level surface. Disconnect the negative battery terminal to prevent any electrical issues during the process.
Step 2: Remove Engine Covers
Using your socket set, remove the engine covers to expose the cylinder heads. This will give you access to the MDS components that need to be removed.
Step 3: Disconnect MDS Components
Carefully disconnect the wiring harness connected to the MDS solenoids. Make sure to label any connections if necessary to avoid confusion during reassembly.
Step 4: Remove MDS Solenoids
Using your socket set, remove the MDS solenoids from the cylinder heads. Take care not to drop any bolts or components into the engine bay.
Step 5: Install MDS Delete Kit
Follow the manufacturer’s instructions to install the MDS delete kit. This typically involves replacing the MDS solenoids with non-MDS components and ensuring proper sealing with new gaskets.
Step 6: Reconnect Wiring and Components
Reconnect any wiring harnesses that were disconnected. Ensure all connections are secure to avoid electrical issues after the installation.
Step 7: Reinstall Engine Covers
Once everything is reconnected, reinstall the engine covers using your socket set. Make sure to torque the bolts to the manufacturer’s specifications.
Step 8: Reconnect the Battery
Reconnect the negative battery terminal. Ensure all tools and materials are cleared from the engine bay before starting the vehicle.
Step 9: Test Drive
Start the engine and let it idle for a few minutes. Check for any leaks or abnormal sounds. Once satisfied, take the vehicle for a test drive to ensure everything is functioning correctly.
Additional Considerations
After completing the MDS delete, consider the following:
- Monitor fuel economy changes.
- Check for any engine codes that may arise.
- Consult with a tuner for optimal performance settings.
Conclusion
Performing a Hemi MDS delete can significantly enhance your vehicle’s performance, especially for builds aiming for 550 horsepower. By following this step-by-step guide, you can ensure a successful installation and enjoy the benefits of improved power delivery and throttle response.