-12 feeding a Weldon 2345 single -10 to firewall, "Y" to two -8 feeding the rails. Two -8 to regulator single -8 return. This is my setup and I know of people running in the 7.40 range with this setup on race gas. your duty cycle in the 88% range is an issue if you want to make more power. You can raise the base but sometimes it makes very little difference as the flow drops when the pressure raises. This usually only helps if the system is restricted by small lines or injectors that are a lot smaller than the pumps capacity. You need to look at the injector # rating and the pumps # per hour rating.