Chevy Ls Swap Guide: Building a 600+ Hp Street Beast with Afr Heads and 4l80e Transmission

by

The Chevy LS engine has become a popular choice among automotive enthusiasts for its performance, reliability, and versatility. This guide will walk you through the process of swapping a Chevy LS engine into your vehicle, focusing on achieving over 600 horsepower using AFR heads and a 4L80E transmission.

Understanding the Chevy LS Engine

The LS engine family includes a variety of V8 engines that are known for their lightweight design and advanced technology. These engines are capable of producing significant power with the right modifications.

  • LS1: 5.7L V8, commonly found in the Camaro and Corvette.
  • LS2: 6.0L V8, used in various GM vehicles.
  • LS3: 6.2L V8, known for its high performance.
  • LS7: 7.0L V8, the powerhouse of the Corvette Z06.

Choosing the Right Components

To build a 600+ horsepower street beast, selecting the right components is crucial. Here’s a breakdown of the essential parts you’ll need:

  • Engine Block: Start with a solid LS engine block, preferably an LS3 or LS7 for higher displacement.
  • AFR Heads: Air Flow Research (AFR) heads are known for their excellent airflow and performance capabilities.
  • Camshaft: Choose a camshaft that complements your build and supports high RPMs.
  • Intake Manifold: A high-performance intake manifold will maximize airflow.
  • Fuel System: Upgrade to a high-flow fuel pump and injectors to support increased horsepower.
  • Exhaust System: A performance exhaust system will help reduce back pressure and improve sound.
  • Transmission: The 4L80E transmission is a robust choice for handling high horsepower applications.

Preparing for the Swap

Before you begin the swap, gather all necessary tools and components. Ensure your workspace is clean and organized. Here’s a checklist of what you’ll need:

  • Engine hoist
  • Socket set
  • Wrenches
  • Torque wrench
  • Fluid catch pans
  • Safety gear (gloves, goggles)

Engine Removal

To remove the existing engine, follow these steps:

  • Disconnect the battery and remove all electrical connections.
  • Drain fluids from the engine and transmission.
  • Remove the exhaust system and any components blocking access to the engine.
  • Unbolt the engine from the transmission and motor mounts.
  • Use the engine hoist to carefully lift the engine out of the vehicle.

Installing the LS Engine

With the old engine out, it’s time to install your new LS engine. Here’s how:

  • Position the LS engine on the engine hoist and align it with the transmission.
  • Carefully lower the engine into the engine bay, ensuring it aligns with the motor mounts.
  • Secure the engine to the motor mounts and transmission.
  • Reconnect all electrical connections and hoses.
  • Install the intake manifold and connect the fuel system.

Transmission Setup

The 4L80E transmission requires specific setup to handle the power from your LS engine. Follow these steps:

  • Install the transmission mount and ensure it is secure.
  • Connect the transmission to the LS engine using the appropriate bellhousing.
  • Install a high-performance torque converter designed for your horsepower goals.
  • Connect the transmission cooler lines and ensure proper fluid levels.

Tuning the Engine

After the installation, tuning is essential to maximize performance and ensure reliability. Here’s how to tune your LS engine:

  • Use a standalone engine management system or reprogram the factory ECU.
  • Adjust fuel maps to accommodate the increased airflow from the AFR heads.
  • Set ignition timing for optimal performance.
  • Test and adjust based on dyno results to achieve your horsepower goals.

Final Checks and Testing

Before hitting the road, perform a series of checks and tests:

  • Check all fluid levels and ensure there are no leaks.
  • Inspect electrical connections and ensure everything is secure.
  • Start the engine and listen for any unusual noises.
  • Take the vehicle for a test drive to evaluate performance and handling.

Conclusion

Building a 600+ horsepower street beast with a Chevy LS engine, AFR heads, and a 4L80E transmission is an exciting project that can yield impressive results. With careful planning, the right components, and proper tuning, you can create a powerful and reliable vehicle that stands out on the road.