If you’re only after increased power output, you may as well toss the O2 sensor out the window. It’s not difficult to make power at the expense of fuel, emissions, longevity etc. Stoichiometry is of little importance in this instance.
What I don’t get is how you think your calculations are better than the O2 sensor and standard fuel maps. The O2 sensor adjusts for things you can’t possibly detect; worn compression rings and increased blow by, a partial blockage of an injector pintle, a minute gasket leak, small changes in oil viscosity etc.
Fuel maps contain millions of lines of data and thousands of hours of lab testing and analysis. There are fuel map adjustments made for every degree of coolant temperature, air temperature, engine load, fuel type, knock signal, battery voltage etc ... the list of parameters is almost endless.
You don’t type the way I’d expect an engineer to type, so I don’t think you understand that it’s not as simple as you describe.
Anyway, getting way off track.
O2 sensors are your friend. They help you diagnose engine faults and tell you faster than anything else when there’s a problem. You’ll never do a better job by manually overriding them.