Carbs vs FI Carbs vs Fuel Injection Want to Compare?
The electronic control unit (ECU) receives information from a variety of sensors, in and around the engine and makes the appropriate adjustments to fuel delivery to maintain perfect, preset air/fuel ratios. The problem with original equipment EFI is that reprogramming for nonstandard applications involved creating a new chip for the ECU, a process beyond the capabilities of most engine tuners. Even if a modified chip was available commercially, it was still not possible to tune the injection system for further engine modifications. In the late 1980s a number of programmable aftermarket injection system ECUs arrived in the US, such as those manufactured by 034EFI, AEM, DFI (Accel), Electromotive, Felpro (FAST), Haltech, Hondata, Link, MoTeC, OnTronic 32-bit Fuel Injection, SDS, Split Second, and Wolf. These systems can be programmed on line by connecting them to an IBM-type personal computer. They allow the tuner access to the fuel maps for idle, transition, wide open throttle, cold sta
