03. I also took the time to design a cage to hold the 30-gallon aluminum tank. It bolts in directly in back of the 14-Bolt axle, out of the way of any suspension components. It may seem like a lot more work to add onto an EFI system, but I plan on keeping this truck forever and it made sense to do the entire fuel system right the first time around.
04. Genright Offroad builds some of the best off-road gas tanks and helped me out with all the components I needed to complete my build. Bill Roncallo of BGR Welding was called upon to lay down some of his “sweet joy” (as we call it) and TIG-welded the whole tank together for me. As usual, the completed tank looked like jewelry when he was finished!
05. The EFI system is controlled by a computer, or ECU, that controls the fuel delivery through a throttle body that bolts directly to your manifold in place of your old carburetor. The ECU relies on a number of sensors that must be installed on the motor and exhaust system to help it maintain optimum fuel delivery to the motor. It constantly analyzes and adjusts fuel delivery at different RPM levels, elevation, ambient air temperature and pressure, vacuum, and engine temperature. At first, when reading about all these parameters in the instructions, I was a bit overwhelmed, but after reading through it a few more times, it became clear to me how simple it really was.
06. I noticed (when reading through the instructions in the ignition/engine speed input section) that there are several different ways that the ECU can be wired to pick up the engine speed signal. This is the most important signal for the ECU. It can easily be set up to work with any style ignition system, such as an older points style distributor or my standard GM large-cap HEI. But, if I run an MSD 8366 Pro Billet distributor or a newer ‘80s GM small-cap HEI distributor, the ECU would also be able to control the ignition timing advance in addition to the fuel delivery! I had to do it.
07. The supplied throttle body is a Holley four-barrel unit that would easily inject enough fuel to amply supply my big-block Chevy. It bolted onto my existing intake manifold just like the old carburetor did.
08. After carefully installing all of the hard components such as the throttle body, the manifold air pressure sensor (MAP), coolant temperature sensor (CTS), manifold air temperature sensor (MAT), and the wide band oxygen sensor (WBO2), it was time to run the electrical.