stumped on a sump!
03-22-2008, 09:23 PM
#1
Staging Lane
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stumped on a sump! whats up everybody? im installing a 5.3/4l65e in my 64 malibu im use ing a external fuel pump. stock fuel tank 72 malibu sending unit with return do i need to make a sump? and why? thanks
03-23-2008, 01:02 AM
#2
You don`t HAVE to sump the tank, but it would be a good idea.
With a carb when you corner or accelerate hard and the fuel pickup sucks air it does not matter, but with EFI the pump runs dry which isn`t good, and the engine will immediately fall flat on its face.
If you don`t sump the tank you will probably have to always run with a minimum of 1/4 to 1/2 tank to avoid fuel sloshing away from the pickup
With a carb when you corner or accelerate hard and the fuel pickup sucks air it does not matter, but with EFI the pump runs dry which isn`t good, and the engine will immediately fall flat on its face.
If you don`t sump the tank you will probably have to always run with a minimum of 1/4 to 1/2 tank to avoid fuel sloshing away from the pickup
03-23-2008, 02:12 PM
#4
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+1
Having a sump just means your allowing for the fuel to enter the lowest center of gravity (LOG), which will ensure that fuel is always being supplied to the pump.
Jegs sells a sump kit for $60 plus fittings, or you can just buy a fuel cell with the sump already in it if you don't feel like mutilating your factory tank.
Having a sump just means your allowing for the fuel to enter the lowest center of gravity (LOG), which will ensure that fuel is always being supplied to the pump.
Jegs sells a sump kit for $60 plus fittings, or you can just buy a fuel cell with the sump already in it if you don't feel like mutilating your factory tank.
