is anyone running a return line with a stock tank?

[Capt Jack]

how where did you plumb it?  where did you tap into the tank?

I'm in the process of redoing the fuel system on my ride (among other things) and would like to run a return from the reg I have instead of the dead-head layout thats on it now.   I have a stock tank/filler tube and I had this crazy idea of tapping into the filler neck and using a down tube into the main fuel area to keep it from sounding like running water all the time.

thoughts? 

[72polara]

When I did it in my Polara, I took it to a local shop that flushed the tank, then brazed/welded a return fitting near the sender.  I also had them move the pickup towards the back of the tank to prevent it from being uncovered in the 1/4.  I used 3/8" line when I had this done.

you might get away with your filler neck idea, but I'd rather have a shop make it permanent.

[ski]

Mine is brazed into the pickup/sender cap like 72polara described.

[fasttcars]

ya i'd put a rear sump on that baby..then use the old pickup as a return

[Capt Jack]

oooh...now thats an idea!

yeah, good call.  might as well do it right vs right now.

[doug 371]

the 72 tank has a return line hose fitting just above the sending unit

[Capt Jack]

oh yer kidding.
my ride is a 73, so there might already be one there?



neat!  I'll take a look

[flyboy01]

When I bought the 3/8" pickup for my tank, it had a 3/8 outlet and a 5/16" vent tube which i am eventually going to use with my stock 5/16 fuel line as a return when I upgrade the fuel line to a 3/8" The 68 Darts had the vent in the fuel filler tube, so right now I just have the vent in the pickup capped off.

[Jamakin]

I baught a replacement sending unit from napa becuase mine was leaking, i got the 3/8th one so i could upgrade my fuel lines later.  The replacement unit had a return line built into it

[Capt Jack]

...so much for an "original" idea, eh?

yeah, thats precisely what I was considering

[NYrr496]

If you put the return line near the pickup, point it away so the return fuel doesn't disturb the fuel near the pickup. It can airate it, especially when the level is low.

[flyboy01]

Look at the picture above.

[Capt Jack]

does it make a trickle sound as its feeding back into the tank?

would hate to ride around with what sounds like someone wizzing in my trunk   

[lazarus]

 I doubt you'd hear anything over the rumble of the exhaust, fuel pump noise, etc.

[doug 371]

see in flyboy's pic that indented area right above the sending unit...thats where my 72 has a return line

[68S]

From what I have read it is best to locate the return at a point that is above the fuel level, or as near the top of the tank as possible. The reasoning is that with a return mounted too low in the tank the fuel level may create a resistance which might not allow the fuel pressure to drop quick enough when the return port on the regulator is opened. Just one more thing, be careful when working with old gas tanks or their components. Fuel can be stored in the molecules of the metal and release itself as an explosive vapor when the metal becomes heated. Most places that work on old tanks like that will constantly purge the tank with CO2, or some other inert gas, during the welding process to displace any oxygen and there by prevent the fuel vapors from igniting. Sorry to get all safety patrol on you there but I am just trying to make sure that when someone says you have a smokin’ Mopar they are saying it for the right reason.

Pat

[Ace]

I planned on having a fitting put in the tank like what was descriped.  I'm also sumping my stocker too.

[Capt Jack]

not sure Id be willing to sump this stocker tank.  Ive seen tank blowouts and not real keen on them.   

I'd dearly love to go to a cell on this ride (which would simplify things immensely), but Im not real thrilled with the idea of having to firewall the trunk either.

I'll check it out real good this weekend and decide from there.  thanks to everyone for their input

[NYrr496]

I sumped a stock tank once. I'll never do it again. It was very difficult to weld the old metal. I bought an Aeromotive sumped tank for my roadrunner. It was pricey ( 560 bucks), but I think it'll work way better.

[tt440]

We ended up welding a fitting on the filler neck itself to attach the return line to, easier to remove than the tank and less chance for an oops

[PureGTS]

I converted my wife's 85 Crew Cab to a 94 5.9 MPI back in 96. To run the EFI  high pressure pump I had to run a aftermarket fuel pressure regulator AND run/build a return line that wouldn't restrict the regulator's return feed. I mounted the regulator on the firewall and ran the return line back to the tank breather tube thinking it was already there and yes it did work... to a point. When it came time to fill hte tank the breather line trapped the fuel and the gas pump would kick off...  ALOT! I took a piece of left over 5/16 metal line hooked the end of it (so it points down the fill neck) and drilled a hole in the neck and soldered it in with a propane torch and some acid core solder and flux paste. When running, the returned fuel is visible if the cap is off (a good indicator that the fuel pump is working). To secure the line I bent it to follow the contour of the neck for about 2-3 inches and soldered it to the neck so the line would be supported and not be stressing the point of entry at the neck. Then I just bent it out and next to the neck and attached a short piece of FI fuel hose. To date it hasn't caused any issues or leaks and we've put close to 100K on the truck since we went MPI. Also, there has never been any audible noise from the returning fuel dribbling into the tank. This truck has no dual exhaust or flow masters on it. It is very quiet running and is very non-suspect should you run up on it on the street. On top of that, it is uuuuuggglllyyy. Your only warning is the "V8 MAGNUM" emblems I put on the front fenders.

[Capt Jack]

awesome post.  thanks a ton for all the info. 

[BBLM23]

does it make a trickle sound as its feeding back into the tank?

would hate to ride around with what sounds like someone wizzing in my trunk   

[375InStroke]

The stock 440 Magnums and Hemis had the return line in the sender.