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The journey from a stock HEMI engine to a powerful 700+ horsepower beast is an exciting and rewarding endeavor for any automotive enthusiast. This guide will walk you through the essential steps and components needed for a full HEMI MDS (Multi-Displacement System) delete build, utilizing forced induction and upgraded internals to achieve impressive power levels.
Understanding the HEMI Engine
The HEMI engine, known for its distinctive hemispherical combustion chamber design, offers a strong foundation for performance upgrades. Stock HEMI engines typically range from 345 to 392 cubic inches, producing anywhere from 360 to 485 horsepower. However, with the right modifications, these engines can reach and exceed 700 horsepower.
Why Delete the MDS?
The Multi-Displacement System (MDS) is designed to improve fuel efficiency by deactivating half of the engine’s cylinders under light loads. While this feature is beneficial for daily driving, it can hinder performance when pursuing high horsepower goals. Deleting the MDS allows for a more consistent power delivery and eliminates potential issues associated with the system.
Essential Components for Your Build
- HEMI MDS Delete Kit
- Forced Induction System (Supercharger or Turbocharger)
- Upgraded Internals (Pistons, Rods, Camshaft)
- High-Performance Fuel System
- Engine Management System
HEMI MDS Delete Kit
A HEMI MDS delete kit typically includes new lifters, a non-MDS camshaft, and various gaskets and seals. This kit is essential for removing the MDS functionality and ensuring that your engine runs smoothly with all cylinders active.
Forced Induction System
Choosing between a supercharger and a turbocharger largely depends on your power goals and driving style. Superchargers provide instant power delivery, while turbochargers can offer higher peak power with better efficiency. Both options can help you achieve the 700+ horsepower mark.
Upgraded Internals
To handle the increased power, upgrading your engine’s internals is crucial. Consider the following:
- Pistons: High-compression forged pistons are recommended for durability and performance.
- Connecting Rods: Upgraded rods will withstand the increased stress from forced induction.
- Camshaft: A performance camshaft will optimize airflow and improve power output.
Fuel System Upgrades
With increased horsepower comes the need for a robust fuel system. Upgrading your fuel injectors, fuel pump, and fuel lines will ensure that your engine receives the necessary fuel for optimal performance.
High-Performance Fuel Injectors
High-flow fuel injectors are essential for delivering the increased fuel volume required by your modified engine. Choose injectors that match your horsepower goals and ensure compatibility with your fuel system.
Upgraded Fuel Pump
A high-performance fuel pump will provide the necessary fuel pressure and volume to support your engine’s demands. Look for pumps that are rated for your target horsepower level.
Engine Management System
To fully utilize the potential of your upgraded HEMI engine, an aftermarket engine management system is recommended. This system allows for precise tuning, ensuring that your engine runs efficiently and safely at high power levels.
Tuning Options
Consider working with a professional tuner who specializes in HEMI engines to achieve the best results. A proper tune will optimize fuel delivery, ignition timing, and boost levels to maximize performance and reliability.
Installation Process
Installing the components for your HEMI MDS delete build requires careful planning and execution. Here are the general steps involved:
- Remove the engine from the vehicle.
- Disassemble the engine to access the internals.
- Install the MDS delete components.
- Upgrade the internals as necessary.
- Install the forced induction system.
- Reassemble the engine and install it back into the vehicle.
- Upgrade the fuel system and install the engine management system.
- Perform tuning to optimize performance.
Conclusion
Transforming your stock HEMI engine into a 700+ horsepower powerhouse is an ambitious yet achievable goal. By following this comprehensive build guide and investing in quality components, you will enjoy the thrill of driving an exceptionally powerful vehicle. Always remember to prioritize safety and reliability throughout the process.