Quote
If I run 14AWG, the voltage drop is 11.7% to the pump.

Have you measured this?
We run both 14 and 12Ga and this works fine with a Bosch 044 pump on 670HP engines that use 80 PSI for base pressure and a 1:1 rise from there. Most of the Porsches I have setup ran 14Ga.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.