Who besides me has no ******' clue what they are talking about????
I'll CLiffs notes it for you. I'm not trying to be patronizing BTW.
Turbo engines need larger injectors.
Larger injectors are expensive.
Cutting the restrictor/spray cap off a stock LS truck injector roughly quadruples it's output for free, from 24 to 80-ish lbs/hr.
It's also wildly inaccurate, so they need to be tested, a set of 8 can have a variance of over 10%, or flow at right angles or something, thusly hydrolocking your fancy turbo LS engine.
Companies will test them for you, for roughly 75 a set, since you need to test at least 2 set's to get a matched set, it get's costly fast.
By spraying them into graduated cylinders, you can see the flow and pattern for yourself.
By using an Arduino, (a cheap little computer, 30 bucks), you can precisely time how long they spray for, rather than using a sundial or some other guestimation.
By knowing exactly how much they flow for a set time, boom, now you save yourself, or make yourself, 75 a set.