I run (2) Walbro 450lph pumps which supports 1400hp flywheel on e85.

Overbuild your fuel system... or suffer a motor meltdown doing it half assed.

 

The larger KB BAP can supply up to 40 amps of current!
Our RXP340 pumps draw apx. 17 amps each @ 16V @ 80PSI.

 

This is what my math says...for 2 pumps basically double the power number. You would want to use your base fuel pressure + boost pressure (if using a referenced regulator) as the pump pressure on the bottom. Read up then over to the left. A voltage booster would shift both lines upward.

Example, 55psi base pressure and 20psi of boost on gas. Enter bottom at 75psi to the red line, then over to the left for just shy of 800rwhp.