[dumb_ricer]

The way I have always looked at it, is that you will run out of injector at peak torque, but you will run out of fuel pump at High RPM's. Dyno results seem to agree with my thoughts in my experience.

At peak torque if the duty cycle is 100 percent, you are out of injector, after that point, you won't run out of injector, but because fuel flow still tends to increase (especially on cars with long powerbands) fuel pumps will die out at high RPM's if the car is still making power.