How to program Vortec injection?

[AwesomeJ10]

X2

I'm not sure a 'normal' (non exotic) engine/car exists stock from the OEM that's not leaving at least 20 percent on the table.

[csuengr]

Factory calibrations are compromises, but they are darn good. This is not counting derated engines for chassis cabs and such. Which I never understood.

Before you go to hard on me, I am currently fiddling with a Ford engine. So far all the usual power tricks, aside from ignition timing, makes it run horrible. Took forever to figure out to adjust timing. It has 4 spark tables, 4 spark modification functions (2 for ECT and 2 for ACT) and two global modifiers. Adding fuel makes it run bad, with poor economy. My best so far is actually leaning it out a tad while advancing spark.