Table of Contents
The 5.7 HEMI engine is known for its robust performance and reliability. However, enthusiasts often seek ways to enhance its power output. One popular modification is the installation of a COMP Cams 268HR camshaft, which can help you achieve over 450 horsepower. This article will guide you through the process of maximizing your 5.7 HEMI’s potential with this cam upgrade.
Understanding the COMP Cams 268HR Camshaft
The COMP Cams 268HR camshaft is designed specifically for the 5.7 HEMI engine. It offers a balance of performance and drivability, making it a popular choice among enthusiasts. Here are some key features:
- Duration: 268 degrees intake and exhaust.
- Lift: .601 inches on both intake and exhaust.
- LSA: 112 degrees for optimal performance.
This camshaft is engineered to improve airflow and enhance engine responsiveness, resulting in significant power gains when installed correctly.
Preparing for Installation
Before diving into the installation process, it’s crucial to gather the necessary tools and materials. Here’s what you’ll need:
- Basic hand tools (wrenches, sockets, screwdrivers)
- Torque wrench
- Camshaft installation tool
- Engine oil
- Assembly lube
- Gaskets and seals
Additionally, ensure that you have a service manual for your specific 5.7 HEMI model. This will provide valuable information on torque specifications and specific procedures.
Step-by-Step Installation Process
1. Remove the Existing Camshaft
Begin by disconnecting the battery and removing any components that obstruct access to the camshaft. This may include:
- Intake manifold
- Valve covers
- Timing chain cover
Once these components are removed, mark the position of the timing chain and remove it. Carefully extract the old camshaft, taking care not to damage any surrounding components.
2. Install the COMP Cams 268HR Camshaft
Before installing the new camshaft, apply assembly lube to the cam bearings and lobes. This will ensure proper lubrication during initial startup. Align the camshaft with the timing marks and gently slide it into place.
3. Reassemble Engine Components
Once the camshaft is securely in place, reattach the timing chain, ensuring it is aligned correctly with the timing marks. Next, reinstall the timing chain cover, valve covers, and intake manifold. Make sure to replace any gaskets or seals that were removed.
4. Final Checks and Start-Up
Before starting the engine, double-check all connections and ensure that everything is torqued to the manufacturer’s specifications. Reconnect the battery and start the engine. Allow it to idle for a few minutes and listen for any unusual noises.
Tuning for Maximum Performance
After the installation of the COMP Cams 268HR camshaft, tuning is essential to fully realize the performance gains. Here are some options to consider:
- ECU reprogramming to optimize fuel maps.
- Installing a high-performance intake and exhaust system.
- Using a dyno to fine-tune engine parameters.
Tuning will help to ensure that your engine runs smoothly and efficiently, maximizing the horsepower and torque potential of your upgraded HEMI.
Conclusion
Installing a COMP Cams 268HR camshaft in your 5.7 HEMI can significantly enhance its performance, helping you achieve over 450 horsepower. By following the steps outlined in this guide and ensuring proper tuning, you can enjoy the benefits of increased power and responsiveness. Always remember to consult with professionals if you’re unsure about any aspect of the installation or tuning process.