FUNFER2 Kevin Dean here on the forum has been running this system for almost 2 years. He's the guy to talk with. There is some programming with this system. It depends on how you are running it, Open loop, Closed Loop, Alpha N, or Map sensor programming. Some systems have a 5-10% adjustment factor to adjust the A/F mixture. Like any system, you get a basic program to get the motor running then do the fine tuning yourself. They need, motor size, camshaft, compression, firing order, and even location where you live, Death Valley or Denver.
Rick L.