Electronic Fuel Injection Upgrade - A Six-Pack Of EFI

Now the entire fuel pump/pickup assembly was re-inserted into the factory tank without any further modifications.

While the tank was out, a fuel filter designed for high-pressure fuel systems was installed.

Factory steel fuel lines could be corroded from the inside, so they shouldn't be used for a high-pressure, fuel-injection conversion. Bruce used high-pressure nylon lines for this installation. The nylon lines are easy to route, and easy to connect and disconnect, making them perfect for this application. Bruce used braided Kevlar/Fiberglass insulation over the fuel line in areas that will be near the exhaust.

With the fuel system in place, the electronics could be mounted. F&B used a Bigstuff3 EFI computer, mounting it behind the glovebox atop the heater box. The 1.25-inch-diameter electrical cable was then fed into the engine bay through an enlarged vacuum line grommet in the firewall.

The power wires for the EFI computer were connected directly to the battery. Since EFI requires significantly more electrical current to operate, Bruce recommends upgrading to an 80-amp alternator as well.

Sequential multi-port injection requires a crankshaft position sensor to signal the injection events and timing. Instead of trying to modify the factory electronic ignition, F&B used an MSD 6AL electronic ignition and magnetic crank trigger.

The flyweights in the factory distributor can now be welded so the distributor is "locked." The spark curve was now completely controlled by the EFI computer software.

The magnetic pickup was mounted on the driver side of the engine, and the crank trigger wheel was sandwiched with a spacer between the balancer and crank pulleys.

With the fuel system, ignition, and computer installed, the intake manifold was removed to make room for the Six-Pack intake. The engine wiring harness has a ton of wires, but don't worry, they only plug in one way.

The F&B Six-Pack EFI utilizes their billet midsize 44mm throttle bodies mounted to a modified factory style Six-Pack intake manifold. The intake gasket should be replaced with a gasket that has the exhaust crossover blocked since the fuel injection won't need intake heat to work properly.

Throttle linkage is mechanical, uses the car's original throttle cable, and progressively opens the outboard throttle bodies just like the Six-Pack carbs did.

With the manifold in place, the wiring harness was routed to the sensors and fuel injectors; care should be taken not to route wires near the exhaust or pinch points.