Injector Sizes

[KidRod4]

Hi Guys, can anyone tell me a bit about fuel injectors on the 5.0lt. Ive heard people talk about 19lb injectors up to 24lb injectors, Im guessing the higher the poundage, the more fuel you're gonna push through? Id like to know what sizes were used on which V8 engine? The 5.0lt engine I had in my S1 XLS Ute appears to have had the same injectors that are on the new Tickford S2 200kw engine that I have just installed. On one side of the injectors are the numbers "XS2EB5A" and on the opposite side is "0280155903" What do these mean? Can you tell what lb size they are from these numbers? Thanks in Advance for any assistance and feedback.