Mechanical or electrical fuel pump

A piss poor engine will have a BSFC of .5 and that is high by any standard.

A good mechanical pump will run into the 10's if the rest of the system is up to it.

If the OP is making 500 HP and his BSFC is .45 under load he would need 225 pounds per hour of fuel or about 34.5 gallons of fuel per hour or .6 of a gallon per minute.

AJ should verify my math but I think it correct.