The 5.7 Hemi engine, known for its power and performance, incorporates a Multi-Displacement System (MDS) designed to improve fuel economy. However, many owners find the MDS system intrusive, leading to rough engine operation and a less-than-satisfying driving experience. This is where a 5.7 Hemi MDS delete kit comes into play. This guide explores the intricacies of MDS delete kits, their benefits, drawbacks, and everything you need to know before taking the plunge.
What is a 5.7 Hemi MDS Delete Kit?
A 5.7 Hemi MDS delete kit is a collection of parts designed to disable the Multi-Displacement System (MDS) in your Chrysler, Dodge, or Jeep vehicle equipped with the 5.7-liter Hemi engine. The MDS system allows the engine to switch between using all eight cylinders and four cylinders to optimize fuel efficiency. A delete kit effectively prevents this switching, forcing the engine to always run on all eight cylinders.
How Does a 5.7 Hemi MDS Delete Kit Work?
Different kits employ varying methods, but the core principle remains consistent: to prevent the engine from shutting down four cylinders. This often involves modifications to the engine's computer (PCM) through tuning or the installation of hardware components that physically prevent the MDS system from functioning. Some kits involve simply reprogramming the PCM via a tuner, while others might include additional hardware components.
Benefits of Deleting the MDS System
Many drivers opt for an MDS delete for several key reasons:
- Improved Performance: Running on all eight cylinders consistently provides smoother power delivery and eliminates the noticeable hesitation and rough transitions associated with the MDS system activating and deactivating.
- Enhanced Driving Experience: The smoother power delivery translates to a more enjoyable driving experience, especially during acceleration and passing maneuvers.
- Elimination of Rough Running: The frequent cylinder deactivation and reactivation can result in a rough-running engine. An MDS delete eliminates this issue, resulting in a more refined engine feel.
Drawbacks of Deleting the MDS System
While the benefits are appealing, it's crucial to acknowledge potential drawbacks:
- Reduced Fuel Economy: The primary function of MDS is to improve fuel efficiency. Disabling it will undoubtedly lead to a decrease in your gas mileage.
- Potential Warranty Issues: Modifying your vehicle's engine control system could potentially void your warranty. Consult your vehicle's warranty information and your dealership before proceeding.
- Increased Engine Wear (Debated): Some argue that constantly running on all eight cylinders might lead to increased engine wear over time. However, this is a topic of ongoing debate among automotive enthusiasts.
What are the Different Types of 5.7 Hemi MDS Delete Kits?
The market offers various 5.7 Hemi MDS delete kits, broadly categorized into two types:
- Tuning Solutions: These kits involve reprogramming your vehicle's Powertrain Control Module (PCM) using a handheld tuner or professional tuning services. This is often the most cost-effective method.
- Hardware Solutions: These kits involve the installation of physical components that interfere with the MDS system's operation. These might be more involved and require professional installation.
How Much Does a 5.7 Hemi MDS Delete Kit Cost?
The cost varies significantly depending on the type of kit (tuning versus hardware) and the vendor. Tuning solutions are generally more affordable, while hardware kits can be more expensive due to the components involved.
Is it Legal to Delete the MDS System?
The legality of an MDS delete depends on your local regulations and emission standards. In some areas, modifications that significantly alter a vehicle's emissions could be illegal. Check your local regulations before proceeding.
Will Deleting MDS Void My Warranty?
Modifying your vehicle's engine control system can potentially void your warranty. Always check your warranty details and discuss any modifications with your dealership before proceeding. It's advisable to seek professional advice on potential warranty implications.
Conclusion
Deciding whether to install a 5.7 Hemi MDS delete kit requires careful consideration of the benefits and drawbacks. Weigh the improved performance and driving experience against the potential decrease in fuel economy and warranty concerns. Thorough research and consulting with automotive professionals are recommended before making a decision. Remember to always prioritize safety and legality.
