How to Install a 454 Big Block Mild Cam Upgrade: Power Increase from 390 to 440 Hp

by

The 454 Big Block engine is a powerhouse known for its torque and performance. Upgrading to a mild cam can significantly enhance its horsepower, elevating it from 390 to 440 HP. This guide will walk you through the process of installing a mild cam in your 454 Big Block engine.

Understanding the 454 Big Block Engine

The 454 Big Block, part of Chevrolet’s Mark IV engine family, is revered among car enthusiasts. It is a V8 engine that delivers substantial power and torque, making it a favorite for muscle cars and trucks alike.

Benefits of a Mild Cam Upgrade

A mild cam upgrade can provide numerous benefits for your 454 Big Block engine:

  • Increased Horsepower: Boosts power from 390 to 440 HP.
  • Improved Torque: Enhances low-end torque for better acceleration.
  • Better Throttle Response: Provides a more responsive driving experience.
  • Enhanced Engine Sound: Gives your engine a more aggressive tone.

Tools and Materials Needed

Before starting the installation, gather the following tools and materials:

  • Tools:
    • Socket set
    • Torque wrench
    • Engine hoist (if necessary)
    • Timing light
    • Oil filter wrench
    • Ratcheting wrenches
  • Materials:
    • Mild camshaft
    • New lifters
    • Camshaft installation kit
    • Engine oil
    • Gaskets
    • Sealant

Step-by-Step Installation Process

Follow these steps to successfully install your mild cam upgrade:

Step 1: Prepare the Engine

Start by disconnecting the battery and removing any components that obstruct access to the engine. This may include:

  • Air intake assembly
  • Valve covers
  • Exhaust manifolds

Step 2: Remove the Old Camshaft

To remove the old camshaft:

  • Remove the timing chain cover and timing chain.
  • Take out the old camshaft by carefully sliding it out of the engine block.
  • Inspect the old cam for wear and damage.

Step 3: Install the New Camshaft

Now, install the new mild camshaft:

  • Apply assembly lube to the camshaft and lifters.
  • Carefully slide the new camshaft into the engine block.
  • Reinstall the timing chain and cover.

Step 4: Replace Lifters and Gaskets

Replace the lifters with new ones included in your cam installation kit:

  • Remove the old lifters from the engine.
  • Install the new lifters in their respective positions.
  • Replace gaskets as necessary to prevent leaks.

Step 5: Reassemble Engine Components

Once the cam and lifters are in place, reassemble the engine:

  • Reattach the valve covers.
  • Reconnect the exhaust manifolds.
  • Reinstall the air intake assembly.

Step 6: Final Checks

Before starting the engine, perform final checks:

  • Ensure all bolts are torqued to specifications.
  • Check that all connections are secure.
  • Verify oil levels and add oil if necessary.

Starting the Engine

Once everything is reassembled, reconnect the battery and start the engine:

  • Let the engine idle for a few minutes.
  • Check for any leaks or unusual noises.
  • Take the vehicle for a test drive to ensure everything is functioning correctly.

Conclusion

Upgrading to a mild cam in your 454 Big Block engine can lead to significant performance improvements. With careful installation and attention to detail, you can enjoy the enhanced power and responsiveness of your upgraded engine.