Where to install fuel return fitting in tank

[tumper93]

I just bought a new fuel tank and sump to install in it for an electric fuel pump. I will be running a return line back to the tank and am wondering where to install it in the tank. I have the bulkhead connector and heard that I needed to have the return fuel hit the side of the tank to keep aireation down. So where should I mount it and where should I have the outlet be on the inside of the tank? This is on a 68 Camaro and I am using a new factory fuel tank for this.

https://static1.pt-content.com/images/pt/2006/10/progress-1.gif

[Footjoy]

I am also listening

[tumper93]

I did a search on here before I ever bought a pump and it seemed EVERYBODY said run one with a return so........that is what I got. Now nobody has any idea about where the return line should go in the tank. I am wondering if I should put it in the tank facing the bottom corner to make sure static electricity doesn't build and hopefully keep areation down. I don't want to change my factory pickup tube to 1/2" and go through that mess when a bulkhead can work just as well if sealed and mounted at the top of the tank. What do ya think???? ANybody!!!!!!!!

[Skip Fix]

Most of the factory return lines were in the top of the sender. I would think anywhere away from the pickup to keep from getting tubulence around it. I recently saw an add for a kit to splice one into the filler neck of the tank for those with no clearance on top.

[BlackGMC]

Here is a pretty cool setup. It looks like the return line in on top of the sending unit

https://static1.pt-content.com/images/pt/2007/03/prd_sm_84-1.jpg

http://www.tanksinc.com/index.cfm/page/ptype=product/product_id=84/category_id=61/home_id=61/mode=prod/prd84.htm

[tumper93]

I like that setup, very nice!!!!!!!! I have one on my diesel that returns back to the filler neck, it is a fass system so I know that works on it but not on the camaro. I will just put it to exit at the bottom of the tank in the corner then. Thanks guys for your info.

[Skip Fix]

I wonder if that little reservoir would take the place of baffles?

[Karch]

You do need 7" depth on your tank for that unit above. The reservoir actually acts like a sump, or that is how it is supposed to act.

I thought hard about this one as well, and they are reasonably priced, but I don't think I have the correct depth. One could add a small sump under it, or mod their tank, without it looking too noticeable.

[rockvillespeed]

how much depth's a 2nd gen tank got at that location?

[Karch]

I have no idea.

[rockvillespeed]

skip?

[BlackGMC]

According to the website you assemble the above pump/sump the height of your tank..

Check out this link, it shows and actual install in a 64 chevelle tank.
http://www.thedetailzone.com/Tanks%20Fuel%20Pump%20Install.htm

[John McIntire]

I have read that you do not want to return the fuel into the other port in the sump in order to prevent turbulence right there at the pick-up. You also do not want to return the fuel through the top of the cell directly down into the cell, this will aerate the fuel. You can return the fuel either way as mentioned above, just use an extension on the inside on the cell to direct the fuel towards the rear of the cell if returning it through the sump, or an extension to return the fuel from the top down to the bottom, so the fuel is not just dumping right in and aerating the fuel.
On my cell which is aluminum, I had the sump cut out and replaced the fittings for the right size I was using, and on the return port welded 2 fittings back to back so that I could flare some tubing and attach it to the inside with the correct fittings, and just routed it up to the back of the cell.
If your cell is plastic, you could get away with putting the return anywhere in the cell with a bulkhead fitting. If you put it in the rear of the cell ground level, you would not have to worry about an extension, since the fuel would be returned away from your sump, and it won't aerate the fuel.
Hope this helped!

[Doug F]

I don't think it is a big issue where you put it. I've run it in the top in two positions on my own car with no issues. I wounldn't sweat it too much. Unless you get down to very low levels, if your pickup is submerged I would worry too much.

If you run some 10000 GPH pump in a small cell, maybe it changes things but with a 255 LPH pump or so I wouldn't worry. I can look in my fuel cell and see the return at the top and there really isn't any "aeration".

[tumper93]

I ended up putting it at the rear side of the tank with a bulkead 90 degree facing the bottom and angled to the outside a little.