[ItBites]

If the engine is properly tuned for power right now, you will see no (zero) increase in power. Proper tune is proper tune...

If it is not properly tuned you may get an increase after tuning, but that is from the tuning, not the EFI.

Theoretically, EFI can produce only slightly more power, because it can operate under conditions where the manifold vaccuum (pressure) approaches atmospheric and carbs require a pressure drop to get a signal, but in practice this is inconsequential.

What you can benefit from is improved throttle response and the computer can adjust for altitude and temperature changes. I also find I like being able to re-tune portions of the map without having to worry about transfer slots, emulsion, air bleeds, main jets and power valves. All those compensators on a carburetor work together as a compromise, so one change may benefit one region of performance, but screw-up another... With EFI, just type in a new injector time on the map and away you go - the result is exactly what you expect and has no compromise effects!

Good Luck!