How do you calculate fuel pump flow?
How do I know what flow rate I need?
- 500 X 0.5 = 250 lbs./hr. A gallon of fuel weighs 6 lbs. To get gph divide lbs./hr. by 6.
- 250 lbs./hr. ÷ 6 = 41.67 gph. A liter of fuel weighs about 1.6 lbs.
- 250 lbs./hr. ÷ 1.6 = 156.25 lph. You need the minimum flow rate at your fuel system’s operating pressure.
How many gallons per minute does a fuel pump pump?
Light passenger vehicle pump up to about 50 litres (13 US gallons) per minute (the United States limits this to 10 US gallons [38 litres] per minute); pumps serving trucks and other large vehicles have a higher flow rate, up to 130 litres (34 US gallons) per minute in the UK and 40 US gallons (150 litres) in the US.
Can a fuel pump flow too much?
Using the wrong fuel pump that delivers excess pressure can cause problems ranging from poor performance and lower gas mileage to flooding and carburetor damage. When the pressure is only a little over the required amount, your vehicle may sputter when you first accelerate from a stopped position.
How many GPH is a 700 hp?
Theoretically, the mechanical pump could provide the (approx) 60 gallons per hour that the engine would need, using the formula of 1/2 lb of fuel per horsepower per hour. That’s if you used a quality mechanical pump and not a stocker. So, 700 x . 5 = 350 gal.
What do you need to know about a fuel pump?
All that you need is a fuel flow chart of the pump that you are considering. For example take a look at our GPA-4 fuel pump assembly flow chart. Now lets assume that your engine requires 60 psi and your fuel pump will be supplied with 13.5 volts. As you look at the chart you can see that at 60 psi and 13.5 volts this pump will flow at 63 gph.
How are the flow rates of fuel pumps different?
Fuel pumps have different flow rates at different voltages. As voltage increases so does the speed of the fuel pump which will increase the flow of a pump at any given pressure. Because of this it is good practice to see how a pump is rated at a given voltage. Most cars will produce about 13.5 volts when running.
Can a fuel pump have a low pressure?
Yet it is not a “bad” pump — just an under-rated pump for the application. The fuel injectors can’t flow normally if they have low fuel pressure caused by a bad fuel pressure regulator.
What causes a fuel pump to run slower than normal?
If the pattern has missing humps, it would tell you the commutator is worn. A fuel pump will run slower than normal if the fuel filter is restricting flow, if there is a voltage drop in the pump power supply circuit or if the pump itself is worn.