Hey Guys,

We just posted a new wiring diagram that shows how to wire the Holley Dominator EFI system with our Infinitywire 2-Circuit System. This link will take you to the blog post on our site.

Here are the highlights:

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. This link will take you to 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.

Jay