corax
06-30-2008, 09:18 PM
I got a NWMP aux tank for my 88 4runner a few months ago. I cleaned all the rust off and POR15'd the thing so its ready to go in except I'm not sure how I want to get the fuel into the main tank. It's supposed to be a gravity feed system with a hose running into a fitting where the main tank drain plug is on the bottom. Problem with this is I don't like the idea of having something hang even lower off the main tank, especially a brass fitting that could drain all my fuel if it gets hit hard enough.
So I thought putting a shut valve on it (elec or manual) and have the aux tank drain into the filler neck vent tube for the main tank, but the filler neck is too high and I don't want to put a hole lower than that in the side of the main tank because I'm afraid it'll leak.
My final option is an electric fuel pump, but fuel pumps can get damaged when they run dry from heat build up and I would have no way of knowing when to shut off the extra pump. So I guess my question is if anyone has experience with "solid state" fuel pumps? I can't find anything saying they are safe for short periods of dry running and likewise nothing about how they work except that they do not use a diaphragm. Does anyone know anything about Solid State pumps?
So I thought putting a shut valve on it (elec or manual) and have the aux tank drain into the filler neck vent tube for the main tank, but the filler neck is too high and I don't want to put a hole lower than that in the side of the main tank because I'm afraid it'll leak.
My final option is an electric fuel pump, but fuel pumps can get damaged when they run dry from heat build up and I would have no way of knowing when to shut off the extra pump. So I guess my question is if anyone has experience with "solid state" fuel pumps? I can't find anything saying they are safe for short periods of dry running and likewise nothing about how they work except that they do not use a diaphragm. Does anyone know anything about Solid State pumps?