I am building a multiport fuel injection system for a big block chevy :twisted: . I have already designed the plenum and intake manifold and those are currently under construction. The mechanical side is taken care of but now I need a CPU to control the injectors and timing of the ignition system. I thought about just buying a aftermarket ECM but whats the fun in that! Does anyone have any pointers? Fuel flow from the the injectors is is a function of the amount of air allowed in by the throtle body, and ignition timing is a function of the engines RPM. I can't see anyreason why a uC couldn't handle that. Has anyone attempted such a circuit? Would fine adjustments to the managment parameters be possible while its installed, via laptop, or a little plug in remote with up/down buttons. Thanks for the help!