I have a (couple of) questions about fuel pump flow rating.
I see most of the Walbro pumps are rated at 255ltr/hr (67gal/hr). 67 gallons multiplied by 6.34 lbs. (weight of a gallon of gasoline) is 427 lbs. So the 255ltr/hr pumps flow 427 lbs of fuel in one hour. If you are making 500hp @ .5 BSFC, you will need ~40lbs/hr injectors. 40 x 8=320lbs/hr and you need some headroom there, so I'm guessing you want 350lbs/hr +. All of this at 43.5psi presumably.
Is this correct? What is the pupose of converting gallons to lbs?
So, when you see the flow ratings of these pumps are they rating the flow at 43.5psi?
.
I see most of the Walbro pumps are rated at 255ltr/hr (67gal/hr). 67 gallons multiplied by 6.34 lbs. (weight of a gallon of gasoline) is 427 lbs. So the 255ltr/hr pumps flow 427 lbs of fuel in one hour. If you are making 500hp @ .5 BSFC, you will need ~40lbs/hr injectors. 40 x 8=320lbs/hr and you need some headroom there, so I'm guessing you want 350lbs/hr +. All of this at 43.5psi presumably.
Is this correct? What is the pupose of converting gallons to lbs?
So, when you see the flow ratings of these pumps are they rating the flow at 43.5psi?
.