hey guys i gotta a 2003 "boss" f150. i'm in need of a higher pressure fuel pump, but i was told that i can run an inline pump of equal pressure to the factory one and it will increase my pressure... is this true?... also what size is the factory fuel pump on a 5.4L... thanks

 

2.93

 

Your not giving enough info on what's going on.
Putting a pump inline or even a larger unit in the tank won't raise fuel pressure because it is already regulated by other means.
What would happen is the volume capacity for fuel flow will increase but not the pressure.
Said another way, it's like changeing a water hose size for 1/2" to 5/8" at the same prressure, but the volume increases and the pressure stays the same..
Is that what your looking for?

 

your right... sorry.. what the problem is, is that i am running a 125 shot and i am wanting to go to a 175-200 shot, but they said that i am already near maxing out my fuel pump, so the company told me i need a bigger pump or run an in-line pump in addition to the fuel pump.. i hope this explains it a little better

 

Pick up a Walbro 255lph fuel pump and call it a day.

 

wouldn't a procharger inline pump or kenne bell boost-a-pump accomplish the same thing? but be a bit easier than pulling the bed or dropping the tank?

 

so as long as i get a boost -a - pump it will work the same as taking off the bed and installing a new in tank pump, so does that just increase flow and not pressure considering im not changing the source for the pressure?

 

Do it right the first time. Last thing you want to do is run lean on a 150 shot.

 

The system regulation still determines fuel pressure.
The Boost A Pump will increse volume but only up to the max flow the pipe ID will allow in ant event.
Here is some data to get a handle on the sizing.
88L/hr will support about 290 hp max..
115.........385 hp.
168.........550 hp.
182.........600 hp.

An 88 with boost a pump applied will provide 132 l/hr or about 340 hp..
....168 with boost................................... 285 l /hr or about 560 hp.
....182 with boost................................... 300 l/hr or about 600 hp.

The boost module raises the voltage to the pump increaseing it's volume.
The module has a blower boost trigger input and a level adjust control.
So you need a throttle trigger to make the booster work, then set the pump drive level..
Your final result will be determined by the size of the OEM pump, if a booster is used.
Certainly the pressure from the outlet of the pump or the last pump in line to the regulator can still go up to very high levels and requires the pipeing to have hi pressure ratings but the regulator still drops the pressure to the injectors for their flow rating.

I run a KB blower and the pump booster but it is not set to operate at the present time as the stock fuel system is just enough to handle the boost level until I decide to raise it..

Your setup is different on application and total fuel requirements.
Take advice from the maker of your system for fuel requirements..

 

are you going to put that 200 shot on a stock engine???? Just throw a 255 in there, you will be fine. Might as well upgrade to 24lb injectors.

 

to built 54, my motor isn't completely built but it does have forged pistons/ valve springs and rollers. it should be able to handle a 175 shot. i was just worried about the fuel pump/system problem...thanks for the help guys