Quote:
Originally Posted by Talonmotorsport
If your using an injection engine should you not have a fuel pressure regulater after the fuel filter but before the manifold? If the pump is wired to the ignition and the position of the filter is correct the fuel should not return back to the tank.
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on an injection engine it works by having a regulator releaving the fuel pressure at the far end of the fuel rail back to the tank down the return line.
the pressure is usualy ajusted buy the regulator reacting the vacume in the manifold (some are fixed) and the flow is constent in the return when the engine is running with most of the volume of fuel been returned back to the tank
a sump or a swirl pot is needed to prevent the fuel pump running dry at any time
if you ar adding a sump to your tank it needs to be made so the fuel cannot slosh out back to the tank
think of it like a can shape part welded to the botom of a tank with a 10-12mm hole in the top to the main part of the tank with the feed and return lines at the bottom of the can shape
the fuel is then pumped to the engine from the sump and returned back to it so only the amount used by the engine need to enter the sump trough the hole in the bottom of the tank.
as you brake and go round corners the fuel stays in the sump
a swirl pot type is simmular but seprate to the tank fed by a smaller carb style eletric pump keeping it full of fuel and is used where ther is no room for a sump or as a retro fit to a normal carb car