Start Your LS Engine the Right Way

If you're installing a Holley Terminator X ECU on your LS engine, getting the base calibration correct is the difference between a smooth startup and hours of frustration.

Our LS Holley Terminator X Basemap gives you a proven starting calibration designed to help your engine start, idle, and run safely so you can begin dialing in your tune with confidence.

This basemap removes the guesswork and helps eliminate common issues like:

• Hard starting
• Poor idle quality
• Incorrect injector data
• Timing setup errors
• Startup fuel problems

Whether you're building a street car, drift car, drag car, or swap vehicle, this basemap provides a solid foundation to begin tuning.

Designed for Real LS Builds

This calibration is built using real-world LS setups commonly found in swaps and performance builds.

Typical compatible combinations include:

• LS1
• LS2
• LS3
• LQ4 / LQ9
• 4.8 / 5.3 / 6.0 truck engines
• Cammed engines
• Turbo or supercharged setups (as a safe starting point)

Works with:

• Holley Terminator X ECU
• Holley Terminator X Max ECU

What's Included

Your download includes a ready-to-load Holley Global File that contains:

• Correct engine displacement setup
• Safe base ignition timing tables
• Startup fuel configuration
• Idle air control settings
• Injector scaling setup
• VE base tables
• Rev limiter setup
• Sensor configuration

This allows your engine to start and run safely while you fine tune your combination.

Perfect For

This basemap is ideal for:

• LS swap projects
• New Holley ECU installations
• DIY tuners learning Holley EFI
• Drift / drag / street builds
• Getting an engine running before dyno tuning

If you're tired of guessing through ECU settings, this basemap provides a clean starting point used by experienced tuners.

Important Notes

• This is a starting calibration only. Final tuning is required for your exact engine combination.
• Always verify timing sync and fuel pressure before running your engine.
• Professional tuning is recommended for maximum power and safety.