Modified Mustangs & FordsHow To Engine
Building a Big Torque 408ci Windsor Engine
Pick Up For the Pick Up - Finding low-rpm muscle in a fuel-injected 408ci Windsor with B2 Motorsports
For turnkey reliability and daily driver fuel economy, Lykins opted for an electronic fuel-injection system for this application. Going with FAST's EZ-EFI system rated for 550 hp on one throttle body, this system provided plenty of fuel for this 408ci engine. "This system was extremely easy to set up," Lykins said. "Basically, the throttle body bolts on in place of any carburetor, the throttle linkage hooks right up to the throttle body, and then all of the electrical connections are made from the labeled wiring harness." There are four injectors for the throttle body, which each get their own weather-pack connection. The system comes with its own wide-band O2 sensor to read the A/F ratio, and it also has its own TPS and MAP sensors. "The beauty of the system is that it controls the fuel pump (which is included with the kit, along with a regulator), the electric fan, and will even adjust the idle speed if you flip the A/C on."
There is a handheld controller that will connect to your cigarette lighter or 12V source. On a fresh install, you tell the controller how large the engine is, which throttle body you have [this will accept (2) throttle bodies for those dual-carb setups], the desired idle speed, let the TPS see closed and wide open throttle, then you light the engine off.
For the next few minutes while the engine is warming up, the system learns and adapts the A/F ratio to the engine's needs. After that, several short pulls are made on the dyno to let the system learn the A/F ratio for part throttle and WOT situations. The rpm range can then be increased and the results can be measured. Of course, it's not possible to get every bit of information that the system needs from a dyno session. It really learns from being out in the real world, driving around, and seeing what the engine needs from various scenarios.