Holley Dominator EFI ECU


Dominator EFI Engine & Vehicle Management System



Dominator EFI systems are sold “Build to Order”. The following must be purchased for a complete system: ECU (includes software and programming cable), Wideband Oxygen Sensors, Main Wiring Harness, Injector Wiring Harness, Ignition Adapter Harness and Accessories Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance.


Holley Dominator EFI ECU Vehicle Management System are aimed for all engine applications from unlimited high-end racing applications to street. Known for its unlimited capabilities to control any power adder, output, or input you can toss at them.

Features Include:

  • Works with 4, 6, 8 and 10 cylinder engines
  • 12-channel distributorless ignition outputs capable of directly driving smart ignition coils or Holley DIS coils
  • Integrated electronic transmission control–currently can control GM 4L60E and 4L80E
  • 12 sequentially driven 8:2 peak and hold injector drivers capable of driving up to 24 low or high-impedance injectors
  • Plug and play control of factory GM 24x and 58x LS engines
  • Integrated dual channel wideband oxygen sensor controls, work with NTK or Bosch sensors
  • Integrated drive by wire throttle body control, can control two drive by wire throttle bodies
  • Turbo boost control
  • 4-stage progressive nitrous oxide controller
  • Integrated water/methanol injection control
  • Integrated data acquisition and control allowed with massive amount of programmable inputs and outputs
  • Self-tuning fuel table strategy greatly simplifies tuning process
  • Store and change between four calibrations
  • Internal data logging standard with a huge 2 GB of memory
  • Configurable User Password Protection – “Lock” your tune to prevent tampering
  • Individual cylinder fuel and spark control allows you to unlock your engine’s potential


  • ECU is fully potted and can be mounted in the engine compartment or interior – See images for dimensions
  • Sealed automotive and marine grade connectors
  • Optional LED gauges (Part numbers 553-100 and 553-101) eliminate the need for additional sending units
  • Optional Race Dash coming soon
  • Optional 5.7” full-color touchscreen LCD allows easy on-the-fly tuning, data-logging or can be used as an easy to see graphical gauge panel (Part number 553-103)

Data Visualization Tools:

  • Strip Chart – For real-time data viewing
  • Data Logger –Analyze and export your data with sophisticated, but user friendly tools – Internal logger has 4 GB of memory
  • Fully Configurable lap top Gauge Panel – Life-like gauge cluster on your laptop screen

4 Stage Nitrous Oxide Control:

  • Fully featured nitrous control eliminates the need for a separate nitrous controller device
  • Progressive control based on time, RPM, or boost, requires part # 554-111
  • Can be configured “Wet” or “Dry” with closed loop feedback
  • Full timing retard/control configurability per stage based on RPM or time
  • Lean or rich safety cutoff

Inputs and Outputs:

  • 4 – Speed Inputs – Can be configured as a digital (square wave) input or an inductive input
  • 13 – “Multi-Inputs” – Can be configured as a 0-5V sensor input, 0-20v sensor input, thermistor temperature input, or high or low voltage input
  • 30 – 0-5V Sensor Inputs – Configures any 0-5V sensor as well as some can be used as switched high or low inputs
  • 16 – Ground PWM Outputs – Can be configured as PWM or switched ground outputs. Rated at 2A maximum
  • 20 – 12v PWM Outputs – Can be configured as PWM or switched 12V outputs. Rated at 2A maximum
  • Configurable for: dual cooling fans (including brushless fans that require PWM signal), dual fuel pumps, AC inputs, basic TCC lockup, and multiple timing retard inputs
  • All inputs and outputs are programmed using innovative new “Pin Mapping” strategy that allows inputs and outputs to be pinned as desired by the user, allowing for inputs and outputs to not be “wasted” by non-used dedicated functions
  • User programmable caution and warning outputs for all sensors