jerr6

iTrader: (1)

I have a 6.0 carbed setup with a stinger plate. I have the Holley hp125 fuel pump, flows 110gph @7psi. On motor car runs 11.80 with 100hp shot 11.2 on street tires. When do I need to go with a bigger fuel pump like a 140gph pump?

JoeNova

110 GPH is good for ~1000 HP.

When you decide to up that 100 shot to an 800 multi-stage kit, then you can go with the 140 GPH pump.

jerr6

iTrader: (1)

The fuel pump feeds both engine and nitrous. Holley says only up to 700hp.

JoeNova

The flow rating directly corresponds to how much HP it can handle.
110 GPH is 440 LPH. A typical Walbro 450 LPH pump has been pushed over 800 HP at the wheels on a turbo setup with a lot more fuel pressure, which is a major factor because it only flows 380 LPH at 60 PSI of fuel pressure.

If the 110 GPH pump is flowing 110 GPH at whatever pressure you're running it at, then you have some SERIOUS headroom.

jerr6

iTrader: (1)

I run it at 6psi and pump max is 7psi.