Gas Tank connection

Steve Riley · #1 (**permalink**) 11-19-2006, 02:13 PM

Can anyone tell me how they plumbed their fuel line from the gas tank to the fuel pump? The SW fuel sending unit doesn't have a fitting to connect to. Do you drill a hole through it? Make a tap in somewere else? Not sure of the right way to do this. Any advise guys?
Steve

Ron61 · #2 (**permalink**) 11-20-2006, 05:13 AM

I am not familiar with that particular fuel sending unit, but there should be some kind of connection as the fuel gage reads right off a rheostat controlled by the float in the tank. That is why some people have problems getting the right reading. They have a gage that uses one set of resistances and a pick up and unit that has another set of resistance. As the gas gets lower, the float goes down raising the resistance and thus lowering the reading of the gage. It has nothing to do with the fuel lines themselves. Unless this is a completely different kind of sending unit and pick up that I have no experience with at all.

Ron

mickmate · #3 (**permalink**) 11-20-2006, 09:28 AM

The sender unit also incorporates a fuel pick up and return on alot of newer vehicles. The older ones we're trying to replicate mostly use a sender as a separate unit to the fuel pickup, vent and if needed return lines.

Steve Riley · #4 (**permalink**) 11-20-2006, 12:48 PM

I see what your saying about the pick-up should be in the sending plate that fastens into the gas tank. This one from Stewart Warner doesn't have this . I'm not sure how your supposed to do this, you must have to make a pick-up somehow, I'm just not sure how this should be done.
How can they not have a means to draw fuel?
Steve

Steve Riley · #5 (**permalink**) 11-20-2006, 01:08 PM

I'm thinking maybe this sending unit and plate were meant for a fuel cell with separate connections.
Steve

priobe · #6 (**permalink**) 11-20-2006, 01:30 PM

Steve,

I noticed that you have an EM as your Cobra Manufactor. The SW sending you is just that a sending unit. It does not have a provision for fuel pickup. EM should have installed a pickup tube either on top of the tank or on the fron side of the tank for fuel pick up and if you instructed them to install a return.[IMG]\\192.168.3.103\Picture Album\Cobra\MY PICS OF COBRA\front_gastank.jpg[/IMG]

G.R. · #7 (**permalink**) 11-20-2006, 09:19 PM

Yup just like priobe said the SW sending unit "is just that a sending unit". It is not a source for fuel pickup or return. It's function is to send a reading of the fuel level in your tank.

Steve Riley · #8 (**permalink**) 11-21-2006, 02:10 PM

There is an old saying somewhere about prior planning preventing me from making a screw up like this. Oh well, on to installing a sump on the tank.
Steve
Thanks Guys!