Step-by-step: Achieving 500+ Rwhp with a Gmpp Camshaft Upgrade on a 5.7 Hemi

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The 5.7 HEMI engine has gained a reputation for its impressive performance potential, especially when modified. One of the most effective upgrades is the GMPP camshaft, which can significantly enhance horsepower and torque. In this article, we will outline a step-by-step guide to achieving over 500 rear-wheel horsepower (RWHP) with this upgrade.

Understanding the GMPP Camshaft

The GMPP (General Motors Performance Parts) camshaft is designed to optimize the performance of the 5.7 HEMI engine. It features a specific lift and duration that allows for better airflow, resulting in increased power. Before diving into the installation process, it’s essential to understand its specifications and benefits.

  • Increased lift and duration for improved airflow
  • Enhances throttle response
  • Compatible with stock components with minor adjustments

Preparation for Installation

Before starting the installation of the GMPP camshaft, preparation is key. Gather all necessary tools and components to ensure a smooth process. Here’s what you will need:

  • Socket set and wrenches
  • Torque wrench
  • Camshaft installation tool
  • New gaskets and seals
  • Engine oil and assembly lube

Step 1: Remove the Engine Cover

The first step in the installation process is to remove the engine cover to gain access to the camshaft. This involves:

  • Disconnecting the battery
  • Removing any components obstructing the engine cover
  • Unscrewing the engine cover bolts and lifting it off

Step 2: Remove the Intake Manifold

With the engine cover removed, the next step is to take off the intake manifold. This is crucial for accessing the camshaft. Follow these steps:

  • Disconnect all sensors and hoses attached to the manifold
  • Unbolt the intake manifold from the engine
  • Carefully lift the manifold off and set it aside

Step 3: Remove the Valve Covers

Next, you will need to remove the valve covers to expose the rocker arms and pushrods. This allows for proper access to the camshaft. Here’s how:

  • Unbolt the valve covers and remove them
  • Label and remove the rockers and pushrods for reinstallation

Step 4: Remove the Old Camshaft

With the valve covers off, you can now remove the old camshaft. Follow these steps carefully:

  • Remove the timing chain or belt to access the camshaft
  • Unbolt the camshaft from the engine
  • Carefully slide the old camshaft out

Step 5: Install the GMPP Camshaft

Now it’s time to install the new GMPP camshaft. This step is critical for ensuring optimal performance:

  • Apply assembly lube to the new camshaft
  • Carefully slide the new camshaft into place
  • Secure the camshaft with the appropriate bolts

Step 6: Reinstall the Timing Chain or Belt

After the camshaft is in place, you will need to reinstall the timing chain or belt. This ensures that the camshaft is correctly timed with the engine:

  • Align the timing marks on the camshaft and crankshaft
  • Install the timing chain or belt, ensuring proper tension

Step 7: Reassemble the Engine

With the camshaft and timing chain installed, it’s time to reassemble the engine. Follow these steps:

  • Reinstall the pushrods and rocker arms
  • Replace the valve covers and intake manifold
  • Reconnect all sensors and hoses

Step 8: Final Checks

Before starting the engine, it’s crucial to perform final checks to ensure everything is in order:

  • Double-check all bolts and connections
  • Ensure proper oil levels and add oil if necessary

Step 9: Start the Engine

Once everything is reassembled and checked, it’s time to start the engine. Be sure to:

  • Reconnect the battery
  • Start the engine and let it idle
  • Check for any leaks or unusual noises

Step 10: Tune the Engine

After successfully installing the GMPP camshaft, tuning the engine is essential to maximize performance. This involves:

  • Using a performance tuner or ECU reflash
  • Adjusting fuel maps and ignition timing
  • Testing for RWHP on a dynamometer

Conclusion

Upgrading to a GMPP camshaft on a 5.7 HEMI can significantly enhance performance, pushing RWHP beyond 500. By following this step-by-step guide, you can ensure a successful installation and unleash the full potential of your engine. Remember to tune your vehicle for optimal results and enjoy the thrilling performance of your upgraded HEMI.