Delivering unparalleled performance and OEM reliability, Walbro’s brand new 525 LPH fuel pump supports up to 700 flywheel horsepower with forced induction, and 900 horsepower N/A. The innovative design of the DCSS 39/50 features a single impeller with two parallel rows of turbine blades.
Under normal operation (60 PSI & 13.2v), this pump can supply 215 LPH or 597 cc/min per injector in the NSX engine, which is enough for approx 580 BHP with gasoline fuel.
How long does a Walbro fuel pump last?
Walbro fuel pumps should last between 10-20 years.
Can a fuel pump be too powerful?
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 much HP will a Walbro 450 support?
Walbro 450 High Pressure
The 450 (F90000267) and 450 High Pressure (F90000274) will both Support 500+hp on E85 Fuel and 700+ on pump gas applications.
Are Walbro fuel pumps universal?
One of the most famous and widely of Walbro’s universal external pumps is the GSL392 255LPH High Pressure fuel pump. The GSL392 has been extensively used for High performance and Racing applications, and is the most popular universal external pump.
Does a fuel pump increase horsepower?
An upgraded fuel pump will, possibly, provide better response from the accelerator function, but it would NOT increase horsepower. Horsepower is a function of engine design, in total. It would do absolutely nothing. The engine decides how much fuel it will use, and the injectors allow that much in.
What does Lph mean on a fuel pump?
Electric fuel pumps for EFI applications are rated in liters per hour, or lph. Factory electric fuel pumps can flow around 180-190 lph in early EFI cars, and high-performance, late-model Vette pumps can flow more than the popular “255-lph” aftermarket fuel pumps.
How many PSI is Walbro 255?
The Walbro 255 liter per hour (LPH) high pressure (HP) fuel pump is the most popular in-tank fuel pump upgrade for the NSX. The pump flows 255 LPH of fuel at a base pressure of 43.5 PSI at 13.5 volts (an increase of approximately 65% over the factory pump).
How much is a fuel pump for 500hp?
A good estimator of volume to power is approximately 10 hp per gallon or 2.64 hp per liter. For example if your pump flows at 50 gph it should be able to support a 500 hp engine (50 x 10 = 500).
How many LPH is a 1200 hp?
To estimate flow, simply multiply 1,200 horsepower x 0.9 BSFC = 1,080 pounds of projected fuel per hour.
What happens if I put a bigger fuel pump?
An upgraded fuel pump may move so much fuel, the factory regulator cannot bleed off the pressure fast enough. If the minimum injection is larger than the required amount of fuel, overly rich air to fuel ratio will occur and a poorly running engine will result.
What happens if my fuel pump is too big?
Too big of a cam for your combination will cause a loss of low end torque and make drivability suffer. Such is the case with fuel pumps, to some degree. This causes fuel pressure to build up to the level that the regulator was designed to maintain. Eventually, all unused fuel is returned to the tank.
What PSI should my fuel pump be?
Required fuel pressure can vary depending on your vehicle’s engine and fuel system. Carbureted engines may require as little as 28 kPa (4 PSI), while modern multipoint fuel injected high-performance engines can require as much as 414 kPa (60 PSI).
How much HP can fuel line support?
A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! Given a big enough pump a 3/8” steel line could support 1000 HP. The simple way to know is to install an electronic fuel pressure gauge.
How much power can a Walbro 460 support?
Walbro 460 / Walbro 450 Fuel Pump
This is a hugely popular in-tank E85 compatible fuel pump capable of supplying 450 L/Hr.
How do I know what size fuel pump I need?
To determine the fuel pump size for a naturally aspirated engine, take the projected horsepower and multiply it by 0.38 to determine liters per hour. If you want to convert that number to gallons, divide the answer by 3.785.
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