Spartan - Jerry is incorrect, I don't have a three pound hammer, its 8 pound!
But all joking aside, tuning a carburetor (assuming the carburetor is worth tuning

) is a matter of understanding the different circuits in the carburetor, and how each reacts to vacuum.
For the youngsters, if one thinks of a carburetor as a computer; then the camshaft is the computer programmer, and the engine vacuum is the program.
Regardless of what one reads in "Hot Rod" magazine, street performance does not necessarily mean terrible economy.
And some carbs just are not worth my time to try to do anything with

As one ages, one learns one's most valuable asset......................is time!
Jon.