[bobcowan]

Self learning is the new wave in EFI. Using wide band sensors, TPS, etc, the computer reads across a broad range of parameters and sets the fuel and ignition curves according to pre-set parameters. For example, If the load is light and the throttle is low, it will try to keep the mixture at 14.7'ish.

If your engine is fairly common and mild, it probably won't need any dyno time. The base settings will probably work fine as a starting point. But if your engine is somewhat bradical, you'll probably need some dyno time to get the base settings closer.