Fuel System Q's

[Chris4x4Gill2]

I am doing a rear fuel cell conversion. I am using a FCG cell.

I need some educating on the best way to run my lines.

It has a stock mechanical fuel pump with return. My plan was to tie the new lines into the hard lines under the cab and then use the stock lines to the pump. This would consist of a feed line and a return line.

The cell has two fittings on it that I planned on using, one for the return, one for the feed.

Now as I'm looking at pictures, I see that alott of peopel with the same tanks are not using a return line at the cell and using the 2nd fitting as a vent. If thats the case, how/where should the retunr line be ran? does it "T" into the feed line? This doesnt sound right to me, but I see it having a vacuume problem if its not vented????

PS, I know I neeed to vent the filler neck, but I havent got to that yet

[FuelCellGuy]

PM sent.

[rlm316]

It may be easier for you to replace the fuel pump with a single line style and only run a new feed line from the tank. I have a FCG cell in the rear of my frame and I bent a new line from the cell to the pump with a hose connection at each end for vibration relief. I followed the contour of the rear brake line and supported it with the stock brake line clips and insulated clamps where there were no stock clips. That turned out very nice, very solid mounting. Let me know where your fuel inlet is going to be and what clearance issues you have with the fill neck on the tank. Good luck, Lane

[Chris4x4Gill2]

Thanks for the reply Mark.

you suggested replacing the fuel pump with one that doesnt require a return or tapping the filler neck for the vent.

What would be the better choice?
Would a vent at the filler neck give enough ventilation?

[Chris4x4Gill2]

If I replace the pump, any idea what model came without a return that will fit my 350?

[Chris4x4Gill2]

Originally Posted by rlm316

. Let me know where your fuel inlet is going to be and what clearance issues you have with the fill neck on the tank. Good luck, Lane

Right now I am playing around with a marine fuel fill. It would require a reducer but I think its possible. I'll know more when I get the bed back on, but if I have to scrap that Idea, the fuel fill was only ten bucks so no big loss

[MonteSS454]

You can just get a vented cap to vent your system, and any 4-7psi fuel pump will work. Just make sure you have it flow the right way

[rlm316]

I think that up to '70 had a single line. I know mine only has one.

[FuelCellGuy]

A vent into the filler neck would be sufficient. Or just use a vented cap as stated above. Mark

[Chris4x4Gill2]

Thanks for all the info guys. Since a new fuel pump is only $15 I decided to go that route. Just got back from the store with the new one.....now just have to install.

I'll use the second fitting for a vent.....where is everyone getting those small filters from? (they look like a small air cleaner) I looked around Summit but couldnt find them.