[sammyg2]

No.
pounds per square inch remain the same no matter what the diameter of the pipe.
Also, said pumps are positive displacement, not centrifugal. Cavitation is not an issue. Neither is aeration after the restrictive filter because the filter is not a true orifice unless it is nearly completely clogged or is grossly undersized. The restriction of flow is after the filter, whether it be the float valve on a carb or the injectors.

Pumps are rated several ways, one of which is NPSHR. Net positive suction head required and it is absolute, not gauge.
That means given a certain flow rate, the absolute pressure at the suction eye must be above minimum or the pump will lose efficiency. The diameter of the suction tube is not an issue, unless it is TOO SMALL and restricts the flow. A larger suction pipe or tube is advantageous in nearly all pump applications.

It is true that on a positive displacement pump, more restriction on either the suction or discharge equates to more amp draw. Flow is not a factor in load on a positive displacement pump. The pump is designed to move a given volume per stroke. No matter what. Most of these pumps have a relieve valve or pressure regulating valve that spills back excess volume ot hte tank so regardless of how much fuel the engine is using, the pump doesn't move any more fuel or build any more pressure.

Centrifugal pumps are a different animal, pump curves show that as differential pressure from suction to discharge increases, flow decreases and amps decrease. As the differential pressure across the pump decreases, flow increases and amps increase. Again, automotive fuel pumps are typically NOT centrifugal in design, especially when used in a fuel injection application.