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The HEMI engine has long been celebrated for its power and performance. However, the Multi-Displacement System (MDS) in some HEMI models can sometimes hinder that performance. In this article, we will explore the differences between the HEMI MDS delete and the stock setup, focusing on the potential for over 50 horsepower gains and improved throttle response.
Understanding HEMI MDS
The Multi-Displacement System (MDS) is designed to enhance fuel efficiency by deactivating half of the engine’s cylinders during light-load conditions. While this feature can improve fuel economy, it may not be ideal for performance enthusiasts. The MDS can introduce a lag in throttle response and limit the engine’s overall power output.
Benefits of HEMI MDS Delete
Removing the MDS can lead to significant improvements in engine performance. Here are some of the key benefits:
- Increased Horsepower: Many users report gains of over 50 horsepower after removing the MDS.
- Improved Throttle Response: A direct connection between the accelerator and the engine results in a more responsive driving experience.
- Enhanced Engine Sound: The exhaust note can become more aggressive, giving a sportier feel.
- Better Tuning Options: With MDS removed, tuning the engine for performance becomes easier.
Comparing Performance: MDS Delete vs Stock
To understand the real-world implications of an MDS delete, let’s compare the performance metrics of stock versus MDS delete setups.
Horsepower Gains
On average, HEMI owners who have performed the MDS delete report gains of:
- Stock: Approximately 350-400 horsepower depending on the model.
- MDS Delete: Up to 450 horsepower or more with proper tuning.
Throttle Response
Throttle response is significantly improved with an MDS delete. Drivers have noted:
- Reduced lag when accelerating.
- More immediate power delivery, especially during overtaking maneuvers.
Installation of HEMI MDS Delete
Installing an MDS delete kit can vary in complexity based on the specific vehicle model. Here are the general steps involved:
- Gather Necessary Tools: Basic hand tools, a socket set, and a torque wrench.
- Remove Engine Covers: Access the engine bay by removing any necessary covers.
- Disconnect MDS Components: Carefully detach the MDS solenoids and wiring harness.
- Install MDS Delete Kit: Follow the manufacturer’s instructions for the delete kit installation.
- Reassemble Engine Bay: Ensure all components are reattached securely.
Potential Drawbacks of MDS Delete
While the benefits are appealing, there are potential drawbacks to consider:
- Warranty Concerns: Modifying the engine may void manufacturer warranties.
- Fuel Economy: The deletion may lead to decreased fuel efficiency during highway driving.
- Check Engine Light: Removing MDS can trigger warning lights that may require additional tuning to resolve.
Conclusion
The HEMI MDS delete presents an exciting opportunity for performance enthusiasts looking to unlock their engine’s full potential. With gains of over 50 horsepower and improved throttle response, the benefits can be substantial. However, it’s essential to weigh these advantages against potential drawbacks, such as warranty issues and fuel economy changes. Ultimately, the decision to perform an MDS delete should align with your performance goals and driving style.