There is a very easy way to know if the pump is at its limits. If you have any obd2 sensor like Torque Pro, then check values of AFR calculated and afr measured. If the measured is a higher number than calculated , then its running lean, aka fuel pump is at its limits. Don't modify/ add a higher capacity pump and / or injectors without checking this and validating. Sent from my SM-G781B using Tapatalk