[bobcowan]

The big advantage to MPI is the injectors are placed almost directly above the intake valves. At low rpm's, you don't need to worry about charge velocity, and the fuel falling out of solution at low air speeds.

This is important with a big engine, that's built with big intake ports, big valves, and a big cam. Essentially, a race engine.

For a near stock engine, or an engine that's built to make low end power, you really won't see much of a difference.