The revolution in electronically controlled fuel injection systems has dramatically changed the way that guys build cars. Not much more than 10 years ago, carbs still reigned supreme. EFI conversions were hard, required a lot of expertise and didn’t get you all of the performance that you really wanted. Over the years, we have shown how easily our Infinitybox system can power and interface with the most popular EFI systems on the market. We recently received an email from a customer asking how to wire the Infinitybox 20-Circuit Kit to the FiTech Go EFI 8 1200 Power Adder Plus. Just like all the other EFI systems, this is easy.
There are blog posts and wiring diagrams on our website for many different EFI systems. The FiTech Go EFI wires to the Infinitybox in the same way as other fuel injection systems.
Before you start wiring the FiTech EFI, you must thoroughly read and understand the instructions that came with your kit. This link will take you to the Go EFI 8 1200 manual. Note that this blog post is just going to cover wiring ignition power from your Infinitybox system, wiring the fuel pump & cooling fan. Refer to the FiTech manual for the rest of the wiring details.
This diagram shows the connections between the FiTech Go EFI harness and the Infinitybox system.
First things first, you need to get battery power and ground to the FiTech harness. The large red wire in their 6-pin connector must go directly to the positive terminal on your battery.
Next, you need to bring ignition power from your POWERCELL to the white wire in their 6-pin harness. In most Infinitybox systems, the ignition output is the light-green wire on your front POWERCELL but check your configuration to be sure. This POWERCELL output will supply battery power to the FiTech system whenever you have the ignition switch on.
Next, you need to connect your MASTERCELL input for your cooling fan to the yellow wire on the FiTech 6-pin harness. You must install a diode in series between the MASTERCELL input and the cooling fan trigger on their harness. We recommend a 1N4001 diode. Note that the orientation of this diode is critical. Check the diagram above for the correct orientation of the stripe on the diode.
There are several advantages to using the Infinitybox system to control the cooling fan directly off of the FiTech harness. First, you do not need to add a relay. That is built into the POWERCELL. Second, our cooling fan outputs are set to soft-start the motor. Click here to learn more about the benefits of soft-starting.
Next, it is time to wire the fuel pump. The orange wire on their 6-pin connector is the fuel pump trigger. This is a 12-volt signal so it cannot be directly connected to the MASTERCELL input for the fuel pump. You must use an inVERT Mini to flip this 12-volt signal to a ground signal for the MASTERCELL. This link will get you more details on the inVERT Mini. The diagram above will show you how to wire the inVERT Mini between the FiTech Go EFI harness and your MASTERCELL fuel pump input.
There are several advantages of using the Infinitybox system to control the fuel pump directly from the FiTech harness. First, we can disable the fuel pump as a security measure if you have our inLINK Radio upgrade. More importantly, having the Infinitybox system control the fuel pump means that you have to run less wire in the car. The MASTERCELL is located close to the EFI system. The rear POWERCELL is mounted near the fuel pump in the tank. There is no extra fuel pump wiring required to make it work.
Wiring your FiTech Go EFI system with Infinitybox is simple and it gets you a powerful electrical system. You can download a PDF version of this wiring diagram by clicking this link.