Had a few people ask about this mod since i have done it and also why i did it in the first place.
I have added a lift pump (fuel pump) into the line of my ZD30, therefor keeping a constant supply of fuel pressure too the injector pump. This helps the strain on the injector pump by not having too suck fuel from the fuel tank, as well as helping with fuel injection timing in the lows revs because of the fuel on demand.
Taking the strain off the injector pump should also prelong its life hopefully, also pluming the spill line back into the return line sends hot fuel back too the fuel tank and not back into the injectors
Since doing this mod i have found i can now pull away from round-abouts in 3rd gear (i have a manual) and thats with 33's, whereas before it used too chug.
I have also found it too be alot more responsive in the lower RPM range.
TO DO THIS MOD THE SPILL LINE NEEDS TOO BE ALTERED! More in the writeup.
I Used a Carter 4600HP Fuel pump which is only 6-8psi of MAX pressure
I made a bracket for the fuel pump which i mounted on the exhaust hanger bracket behind the rear wheel, i then covered the pump with some rubber just too stop anything hitting it from the tyre
Once this was done i used some 90 degree fittings for the fuel hose. The factory fuel hose from the tank is accessed under the carpet in the cargo area of a wagon. I dont have a photo but its a big metal plate, 4 bolts holding the cover plate down about 30cm inwards of the very back. If you have drawers in the back of your patrol then they will have too come out unfortunately. I removed the factory hose from the tank too the metal line and re-routed it though the pump. This is a good excuse to replace all the factory old fuel hoses.
As you can see in this photo there is a little fuel hose coming out under the intake manifold and joins into the large fuel line from the fuel filter at the pump. THIS IS THE SPILL LINE, the return line from the injectors. As you can see in the photo this needs too be blocked and that little fuel line plumbed back into the main fuel return line from the injector pump otherwise the return line from the injectors will be pressurised and this may damage something. I just used a t-piece for this from enzed.
The fuel pump is just wired from ignition so pump will work all the time. Hope this helps some of you
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