I disagree with those figures there are multiple variables that come into play when it comes to power no one can truely say a certain injector is good for certain power depends on what fuel what fuel pressure you are running there to many other varialbes at play to make such a bold statement. if i run 93 through my 440cc and get X amount of power and i run octane booster or water meth or av gas though the same injectors but are able to advance the timing i will get more power at the same duty cycle. but one thing is for sure the stock injectors are not good for power lol
if you really want to see power to injector size all the leading injector guys have calculators on their website
https://www.rceng.com/technical.aspx
http://injectordynamics.com/injector-selector/