I'm not sure if this answers your question, but I'll give it a shot anyway. If you take a look at DRAG turbo kits, or any turbo setup that uses an FMU and stock injectors, fuel pressure under boost is pretty high. Let's say someone was running 7lbs of boost with a 12:1 FMU. If you take a static fuel pressure of 40psi, and add 72psi(12 x 7), that equals 112 pounds of fuel pressure under boost. Granted this isn't the best way to supply fuel to a boosted engine, but many are using FMU without any injector failure problems.