Wiring the Holley Dominator EFI System

EFI systems have been gaining in popularity for years.  Guys want the conveniences, flexibility and power that they get in the engines in modern cars.  Companies have been leveraging technology developed by the large OEMs to bring Electronic Fuel Injection systems to restorations, hot-rods, street rods, resto-mods and component cars.  Our Infinitybox technology does the same thing.  We take technology used in practically every new car and bring it to the average guy in his garage.  He gets the conveniences of less wire, more diagnostics and better functionality out of his wiring system.

It is very easy for us to bring the two systems together:  Infinitywire powering EFI.  This is a question that we get a lot.  How do I connect my Infinitywire system to my EFI system?  We’ve blogged before about the FAST EZ-EFI and others.  This post shows you how to connect the Holley Dominator EFI System to the Infinitywire 20-Circuit System.

Holley Dominator EFI System

First things first, Holley has some very important notes and warnings about wiring their system.  Be sure to read their manual thoroughly and follow their instructions.  The most important things are related to good grounds and keeping all signal & data wires away from the coil wires.

You are going to wire the Dominator, following their instructions.  There are two simple differences when you connect in the Infinitywire system.

Picture of wiring diagram showing how to wire the Holley Dominator EFI system into the Infinitywire system.

Picture of wiring diagram showing how to wire the Holley Dominator EFI system into the Infinitywire system.

First, you are going to give the Dominator its key-on power from the Ignition output on the front POWERCELL.  You going to connect the ignition switch to the ignition input on the MASTERCELL.  When you turn on the ignition switch, the MASTERCELL sends a command to one of the POWERCELLs, usually the front, to provide battery voltage to the ignition output.  This is usually the light-green output on the front POWERCELL but always refer to the configuration sheet that came with your Infinitywire kit.

Next, you are going to use the Infinitywire system to power the fuel pump.  There are several advantages to doing this.  First, the Dominator fuel pump output is only capable of delivering 10-amps.  In most cases, you’d need to add a relay to switch the current to the pump.  The POWERCELL is the relay and it is capable of delivering 25-amps.  You won’t need to add a relay for most commercially available pumps.  Second, the fuel pump is switched from the rear POWERCELL, which is mounted in the rear of the car.  You don’t have to run any extra fuel pump wires to the back of the car.  You just wire the fuel pump from the rear POWERCELL.

There is an important warning that must be followed when you wire MASTERCELL inputs to other controllers, like EFI systems.  MASTERCELL inputs are designed to be connected to ground.  This lets us keep the wire bundles small and simplify how you connect to switches.  Applying 12-volts to a MASTERCELL input will damage the Cell and will void its warranty.

In the case of the Holley Dominator EFI system, it puts out 12-volts for the fuel pump trigger.  You can simply convert this 12-volt trigger to a ground trigger with one of our inVERT Mini modules or a relay.  The application note that we created for the Holley Dominator EFI system shows using an inVERT Mini.  You can download a simple wiring diagram showing you how to do this with a relay by clicking this link.

You can download a PDF of the application note that shows how to wire the Holley Dominator EFI system with the Infinitwire 20-Circuit Harness by clicking this link.

If you have any questions, please feel free to contact our technical support group at (847) 232-1991 or email us at sales@infinitybox.com.