Target Engine HP. Base Fuel Pressure. Psi. Boost Pressure. Psi. Fuel pump FLOW -NA (Petrol). 0. Lph. @. 1.0. Psi. Fuel pump FLOW -NA (E85). 0. Lph. 0.1. Bar . For example the Walbro fuel pumps that we sell are rated at 40 psi. . The better way to select a fuel pump to use in your fuel system is to consider three factors:. Fuel pump sizing for your performance engine is critical. With knowledge and data, selecting a fuel pump for your application is fairly straight forward. DW fuel pump 'call sizes' are rated at 40psi. Please refer to the flow vs pressure charts in the links below to choose the best DW fuel pump for your application. 20 thg 4, 2016 - Hopefully this has cleared up some of the questions you had about Walbro fuel pumps or fuel pump sizing in general. It's a pretty simple . 16 thg 5, 2013 - When we refer to fuel pump size here, we're talking about the size or amount of fuel flow—not the pump's physical size. More accurately, we're . 26 thg 10, 2017 - PDF A need to pump a mixture of two-phase fluid appears naturally in many situations. One example of this situation is aircraft fuel systems, . Fuel Pump & Pipe Sizing Calculator. This pump and pipe sizing tool is applicable for diesel generator and boiler fuel systems. It is based on the use of positive . One of the more commonly misunderstood aspects of Electronic Fuel Injection (EFI) is how to select the correct size fuel injectors, fuel pump and Mass Air.