I've written a tune with fuel pulse widths reduced by 5ms in the 1400-3200rpm and 18-48% load range and ignition advanced 3 deg there too. I'll test it out tomorrow.
"5 ms"? Is that right? Maybe I'm used to the injector time scale on my car, but that sounds like a lot. Are you sure the units aren't Us?
ms= millisecond=0.001 second
Us= microsecond = 0.000,001 second
What's the stock injector pulsewidth in the load/rpm range where you plan to make those changes?
Ah, I see. In that case I'd simplify and convert into %. For example, 117-7=110.
Assuming the stock map is aiming for stoich 14.7 AF ratio, removing 6% should put it around 15.6 AF ratio.
14.7 parts air mixed with 1 part fuel =14.7:1
14.7 parts air mixed with .94 parts fuel =15.6:1 from removing 6% fuel.
14.7/.90 = 16.3 AF ratio from removing 10% fuel.