[Tommy]

Blacklemming,
I'm no expert, but here's what I think you need to know. ... On a computer controlled engine with electronic fuel injection (like most modern engines), the computer controls both the ignition functions (e.g., timing advance) and the fuel functions (how much fuel to add to the air coming into the engine). If you replace the fuel injection with a carburetor, the computer no longer controls the fuel function. So it is not the same.

In general carburetors can be tuned to produce slightly more power than fuel injection at wide open throttle. But electronic fuel injection performs better across a wider range of RPM and throttle settings. That is why they typically get better fuel economy.