Each EFI tank comes with a new high-volume, high-pressure fuel pump to feed your engine. This allows for adequate floor clearance. Most GM stock sending units, such as this one, can be modified with an electric pump, but the pump needs a filter sock touching the bottom of the tank.Įach Rock Valley EFI fuel tank features a dropped sump in the top of the tank. The stock F-Body fuel-pump assembly can be purchased from GM dealers and used for retrofit applications. The key is to buy a pump that is suited for your application. Many builders suggest the Walbro 340 in-tank pump because it holds higher pressures and has proven to be very reliable for supplying LS engines. Virtually any aftermarket EFI in-tank pump that can supply the 60-psi fuel-pressure requirement is suitable. However, in-tank pumps are also more complicated to install, and retrofitting an in-tank pump costs more. In-tank pumps tend to last longer, hold higher pressure, and run quieter. When it comes to fuel pumps, there are two categories: in-tank and external. You can copy and paste this link to share: SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in.
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This Tech Tip is From the Full Book, LS SWAPS: HOW TO SWAP GM LS ENGINES INTO ALMOST ANYTHING. The fuel-pressure requirements alone necessitate some detailed planning. So, simply installing an electric fuel pump is not going to work. There are many components that go into a fuel system (including tank, fuel pump, lines, fittings, and filters) and each one has multiple replacement/upgrade options. Fuel-injection systems require careful planning and component selection.