Fuel system and pump relocation options.

[Mikep]

I am currently reading up about relocating my Facet pump to the rear ( something I should of done ages ago!) and can't seem to find any information on how the fuel system works as I believe there is a return to the tank? Does anyone had a basic diagram?

I'm not bothered about retaining the reserve tap but everyone seems to relocate it to the rear as well as the pump, is this totally necessary? What options do I have? Can I simply blank the main supply from the tank, lose the reserve tap and fit the pump into the reserve line, which I assume sits at the lowest point of the tank? Could I simply feed both pipes through the Pump?

I have read Testrider's post on relocating his pump and he kindly sent PDFs of the old club article on relocating the pump but still a little in the dark.

As usual any advice is much appreciated

 

[SydneyRoverP6B]

Hi Mike,

I fitted a Facet electronic fuel pump into my Rover during 1990, running it in series with the mechanical unit. There is no problem with the mechanical pump drawing fuel through the Facet when it is switched off. Equally, there are no problems when both are running. I disconnected the main fuel line and plumbed the Facet in there, linking the line from the pump back to the main line for delivery to the engine.

The spill return is a smaller diameter line that returns excess fuel to the tank. The mechanical and the Facet are both continuous delivery pumps as opposed to many electric pumps which are of the demand type. That is to say, they start and stop as required rather than running constantly. When the float bowls are full, excess fuel is directed via the spill return back to the tank, thus delivering a constant circulation of fuel.

I left my reserve tap in place, not worrying about the connection with the reserve line and the Facet.

Ron.

 

[Mikep]

Hi Mike,

I fitted a Facet electronic fuel pump into my Rover during 1990, running it in series with the mechanical unit. There is no problem with the mechanical pump drawing fuel through the Facet when it is switched off. Equally, there are no problems when both are running. I disconnected the main fuel line and plumbed the Facet in there, linking the line from the pump back to the main line for delivery to the engine.

The spill return is a smaller diameter line that returns excess fuel to the tank. The mechanical and the Facet are both continuous delivery pumps as opposed to many electric pumps which are of the demand type. That is to say, they start and stop as required rather than running constantly. When the float bowls are full, excess fuel is directed via the spill return back to the tank, thus delivering a constant circulation of fuel.

I left my reserve tap in place, not worrying about the connection with the reserve line and the Facet.

Ron.

Hi Ron,

Thanks for the reply. I think I follow what you are saying. I'm not currently running a mechanical pump as that is redundant (previous owner bypassed this) so I'm only on the electric, so basically if I read you correctly all I need to do is fit the pump at the rear and plumb it into the main fuel line back to the front; in turn the fuel will still go via the reserve tap to the carbs. By doing this I lose the use of the reserve as there is no fuel being pumped through the reserve line? If that is the case that is fine by me.

 

[SydneyRoverP6B]

Hi Mike,

In my case I can use the reserve with the mechanical pump, but not with the Facet.

If you do the same as what I did, then you'll loose the capacity to supply fuel via the reserve line. As you rightly say, it really isn't a problem.

Ron.

 

[Mikep]

Hi Mike,

In my case I can use the reserve with the mechanical pump, but not with the Facet.

If you do the same as what I did, then you'll loose the capacity to supply fuel via the reserve line. As you rightly say, it really isn't a problem.

Ron.

Excellent, just what I thought. I rarely if ever use the reserve so I will just have to keep more fuel in the tank

Well it looks like I'll be doing this job today, nice and easy.

 

[LeeEFi]

Well it looks like I'll be doing this job today, nice and easy.

I never say such things Mike, as a nice easy job then goes on for an age with all sorts of problems.

Good luck with the fuel pump; don't get any petrol in your eyes :wink: