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The Dodge Hellcat is renowned for its incredible power and performance. However, many enthusiasts seek to push their vehicles even further. One popular modification is upgrading to a 2.75-inch pulley, which can significantly increase rear-wheel horsepower. In this article, we will explore how to achieve 700+ rear-wheel horsepower with this upgrade.
Understanding the Basics of Pulley Upgrades
A pulley upgrade on a supercharged engine like the Hellcat’s is designed to increase boost pressure. By reducing the size of the pulley, the supercharger spins faster, compressing more air into the engine, which can lead to increased horsepower. However, this modification must be done correctly to avoid damaging the engine.
Required Components for the Upgrade
- 2.75-inch supercharger pulley
- New belt (appropriate length for the new pulley)
- Performance tune (ECU remap)
- Supporting modifications (fuel injectors, exhaust, etc.)
- Basic hand tools for installation
Step-by-Step Installation Guide
Step 1: Preparation
Before starting the installation, ensure you have all the necessary tools and components. Disconnect the battery to prevent any electrical issues during the process.
Step 2: Remove the Stock Pulley
Locate the supercharger on your Hellcat engine. Use the appropriate tools to remove the stock pulley. This may involve loosening the tensioner and removing the belt. Be cautious not to damage any surrounding components.
Step 3: Install the New 2.75-Inch Pulley
Once the stock pulley is removed, install the new 2.75-inch pulley. Ensure it is seated correctly and secured in place. Reinstall the belt, making sure it is properly aligned on all pulleys.
Step 4: Tune the ECU
After the physical installation, it’s crucial to tune the ECU. This step ensures that the engine runs efficiently with the increased boost. A performance tune will adjust fuel maps, ignition timing, and other parameters to optimize power output.
Step 5: Test Drive and Monitor
Once everything is installed and tuned, take your Hellcat for a test drive. Monitor the performance and check for any warning lights. It’s essential to ensure the vehicle is running smoothly and safely.
Supporting Modifications for Maximum Performance
To achieve and maintain 700+ rear-wheel horsepower, consider additional modifications that support higher power levels. These include:
- Upgraded fuel injectors for better fuel delivery
- High-flow exhaust system to reduce back pressure
- Cold air intake for improved airflow
- Intercooler upgrade to keep intake temperatures low
- High-performance spark plugs for better ignition
Maintenance Considerations
With increased horsepower, regular maintenance becomes even more critical. Pay attention to the following:
- Regular oil changes with high-quality synthetic oil
- Frequent inspections of the supercharger system
- Monitoring fuel quality and octane levels
- Routine checks of the cooling system
Conclusion
Upgrading to a 2.75-inch pulley on a Dodge Hellcat can unlock significant power, allowing enthusiasts to achieve 700+ rear-wheel horsepower. By following the proper installation steps and considering supporting modifications, you can enhance your vehicle’s performance while ensuring reliability. Always remember to maintain your vehicle diligently to enjoy the full benefits of this exciting upgrade.