Dual fuel tanks - anyone tried it?

[83 WB_Ute]

I've thought of doing this, it'd increase the capacity from 70.4L to 140.8L.

My main thing was that I wanted to keep it looking original by only having one filler point/fuel cap. That makes it hard to link both tanks together. The only way that I could work out how to do it was to make a custom tank that become one peice (joined over the top of the tailshaft..) - (then there is the safety issue of the tank being punctured in the event of a crash) By not being able to connect the tanks at their lowest point, it would then mean that both sides of the tank would need their own electric pump and inbuilt sump to empty each side of the tank.
It'd have to be set up in a way that one pumps until it a sensor senses that side of the tank is low, and then the other side would cut in.

Its a lot of stuffing around just for double the fuel capacity..

I didn't think about it too much, but there'd be another way to do it...

[Dick61]

I've thought of doing this, it'd increase the capacity from 70.4L to 140.8L.

My main thing was that I wanted to keep it looking original by only having one filler point/fuel cap. That makes it hard to link both tanks together. The only way that I could work out how to do it was to make a custom tank that become one peice (joined over the top of the tailshaft..) - (then there is the safety issue of the tank being punctured in the event of a crash) By not being able to connect the tanks at their lowest point, it would then mean that both sides of the tank would need their own electric pump and inbuilt sump to empty each side of the tank.
It'd have to be set up in a way that one pumps until it a sensor senses that side of the tank is low, and then the other side would cut in.

Its a lot of stuffing around just for double the fuel capacity..

I didn't think about it too much, but there'd be another way to do it...

I am not sure what you are talking about. Just plumb the tanks to a Tee piece before the fuel pump. Unless you are running an aftermarket fuel set up or a later injected motor, you don't need to over think it. Unless of course the WB runs an electric fuel pump, I always thought they were the same as real Holdens and had a mechanical pump on the side of the motor.

[83 WB_Ute]

I am not sure what you are talking about. Just plumb the tanks to a Tee piece before the fuel pump. Unless you are running an aftermarket fuel set up or a later injected motor, you don't need to over think it. Unless of course the WB runs an electric fuel pump, I always thought they were the same as real Holdens and had a mechanical pump on the side of the motor.

The WB does have a mechanical pump on the side of the motor. Yes, plumbing them to a 'T' peice before the pump would work, but not if you only wanted one filling point/fuel cap.

If you had a filler cap on each side, they could be run as independant tanks straight to the fuel pump. However, me being me, I'd like to make it look as original as possible hiding the modifications....

[Dick61]

The WB does have a mechanical pump on the side of the motor. Yes, plumbing them to a 'T' peice before the pump would work, but not if you only wanted one filling point/fuel cap.

If you had a filler cap on each side, they could be run as independant tanks straight to the fuel pump. However, me being me, I'd like to make it look as original as possible hiding the modifications....

Once again I feel you areover thinking the job, mounting the two tanks next to each other would give you two inlet pipes facing to the right side of the car. by welding another inlet pipe in the rhs tank so that it feeds the lhs tank would allow both to fill from the one inlet. The only problem with this is that the rhs tank would need to be nearly full before the left tank would start to fill. There is aother way of running a single filler to both tanks, use a Tee or a Y in the filler neck so that the one point on the body fills both tanks. A third way to set this up would be to have the lhs tank inlet come out in the removable panel inside the bed. This is only good for those of us lucky enough to drive Utes!!

I am actually considering running the filler neck inside the bed on my Sandman as someone in the past plated up the original filler neck on the body.