changing injectors question about startup

[LeMarky Dissod]

Supposedly the injectors come with flow sheets for my actual injectors

Assuming the flow sheets actually apply to your injectors (there are several places out there that are NOT Fuel Injector Dynamics, that provide flow sheets that look like FID flow sheets, but turn out not to be), you'll have all the info you'll need to adjust not only the basic flow rate, but the low voltage / low pulsewidth behavior as well.