From Stock to Savage: Power Gains and Cost of Supercharging a 6.4l Hemi in the Grand Cherokee Srt

by

The Grand Cherokee SRT is known for its impressive power and performance, but enthusiasts often seek more. One popular modification is supercharging the 6.4L HEMI engine, which can significantly enhance power output. This article will explore the power gains, costs, and considerations involved in supercharging this beast of an SUV.

Understanding the 6.4L HEMI Engine

The 6.4L HEMI engine, also known as the 392 HEMI, is a naturally aspirated V8 engine that produces impressive horsepower and torque right out of the factory. With a stock output of around 475 horsepower and 470 lb-ft of torque, it offers a thrilling driving experience. However, for those looking to push the limits, supercharging is a viable option.

Benefits of Supercharging

Supercharging the 6.4L HEMI can provide numerous benefits, including:

  • Increased Horsepower: Supercharging can boost horsepower significantly, often exceeding 600 hp.
  • Enhanced Torque: Torque gains can lead to improved acceleration and towing capabilities.
  • Improved Throttle Response: Superchargers deliver power more immediately compared to turbochargers.
  • Better Performance: Overall, supercharging can enhance the driving experience, making it more exhilarating.

Types of Superchargers

There are several types of superchargers available for the 6.4L HEMI, each with its own advantages:

  • Roots Supercharger: Known for its low-end torque and immediate power delivery.
  • Twin-Screw Supercharger: Offers high efficiency and better power at higher RPMs.
  • Centrifugal Supercharger: Provides a linear power increase and is often more efficient at higher speeds.

Power Gains from Supercharging

The power gains from supercharging can vary based on the type of supercharger used, the tuning of the engine, and additional modifications. Here’s a breakdown of potential gains:

  • Roots Supercharger: Typically adds 150-200 hp.
  • Twin-Screw Supercharger: Can yield 200-250 hp increases.
  • Centrifugal Supercharger: Often results in gains of 100-150 hp.

Cost of Supercharging

Supercharging the 6.4L HEMI involves several costs, including parts, labor, and potential additional modifications. Here’s a rough estimate:

  • Supercharger Kit: $5,000 – $10,000 depending on brand and type.
  • Installation Costs: $1,000 – $2,500 for professional installation.
  • Tuning: $500 – $1,500 for proper engine tuning after installation.
  • Additional Modifications: $1,000 – $3,000 for supporting mods (exhaust, intercooler, etc.).

Considerations Before Supercharging

Before deciding to supercharge your Grand Cherokee SRT, consider the following factors:

  • Warranty: Supercharging may void the factory warranty.
  • Reliability: Increased power can put additional stress on engine components.
  • Fuel Economy: Supercharging may reduce fuel efficiency.
  • Insurance Costs: Higher performance may lead to increased insurance premiums.

Conclusion

Supercharging the 6.4L HEMI in the Grand Cherokee SRT can transform it from a powerful SUV into a savage performance machine. While the benefits are enticing, it’s essential to weigh the costs and considerations carefully. With the right approach, you can unleash the full potential of your Grand Cherokee SRT.