Fitting to get return line connected to tank

[Bolted to Floor]

I'm trying to get the return line back into the tank on the Mustang. Its a factory 20 gallon tank from the 69 models. Looking to install a fitting near the hole for the sending unit so I can get in there to tighten it up. The link is to a bulk head fitting from Jegs. Does anyone have a better suggestion or idea?

http://www.jegs.com/i/JEGS-Performance-Products/555/100561/10002/-1

Thanks

[Drew Pojedinec]

Nope I used the same one (or thereabouts) for a fuel tank fitting.  Works fine, 3-4 years and no leaks.  I cleaned the steel really well and smeared a lil Seal-All prior to install.

[jayb]

You could try a RobbMc fuel tank sender.  The have two 1/2" tubes built in, one for fuel and one for return.  Also available with AN fittings to easily hook up an AN line. 

http://www.robbmcperformance.com/products/1085_fordsend.html

[Yellow Truck]

The McRobb part is interesting. I wonder if it would work on my 69F100.

I didn't put in a return line, but I did run a new, larger line and needed a bigger pickup than came with the '69 F100. I drilled a hole and used a bulkhead fitting and this part - https://www.summitracing.com/int/parts/rus-639203/overview/ - to drop a piece of brake tube to the bottom of the tank for a new pickup. I drilled a new hole in the reinforced part of the tank beside the original opening.

I had to bend a wrench so I could reach into the opening to hold the bottom of the bulkhead fitting to tighten it.

[Russ67Scode]

McRobb is what I used great piece

[Bolted to Floor]

Thanks for the replies. I'm going with the bulkhead fitting. That McRobb sender is nice, but I got a different plan for the rest of those dollars. 

[cammerfe]

Many years ago when Brother Lon and I first put EFI in his '67 Mustang, we put the return line into the filler neck. It's easy enough to take the filler neck off the car to work on it and just as easy to put it back. It worked perfectly for all the time he had the car, so far as I know.

KS

[stubbie]

You could use a small pot under the bonnet for your fuel and efi pump and run your return into that. No need to mess with original tank then.

[Bolted to Floor]

Many years ago when Brother Lon and I first put EFI in his '67 Mustang, we put the return line into the filler neck. It's easy enough to take the filler neck off the car to work on it and just as easy to put it back. It worked perfectly for all the time he had the car, so far as I know.

KS

 Cammer, I don't know the stories but I've seen the references to Brother Lon. Could you educate me? Sound like y'all had some fun times.

To add more to my story on the bulk head fitting, I will be using a carb for now. But, wanted the return line to help with the vapor lock issues that could happen with today's fuels.

[My427stang]

Regardless of where you put it, be sure to have a "crash switch" or impact switch in the car.  Ford makes a nice one for the early 5.0 Mustangs, it wires in line of the pump and if you crash, it shuts down the fuel pump.

Likely will never need it, but especially if it's in the filler neck, a relatively light hit in the back could pop the hose and have it fill the trunk with fuel.  FYI, I am not a guy afraid of this like some are, I'd even love to build an FE Pinto   However, it's cheap and easy and no reason at all not to be safe

[cammerfe]

'Brother Lon' is my three-years-younger brother, named Leon, and, therefore, Lon.

Back in the '60s we both worked for FoMoCo and did car stuff. He bought a new 390 Mustang, a '67, in late '66. With a 4.44 DL rear end and a few simple mods, he held the class record at Milan for most of the '67 season. But he got caught on a bit of wet track (in the eyes) and the roll-over required a fairly complete re-do. The resulting car was over 100 pounds lighter than it came from the factory.

Soon thereafter we put together a 'crate' 427 shortblock and the upper end from a TP engine that had been part of the LeMans test program---sourced through contacts at FoMoCo.

Jump ahead a few years and, while I was writing for Super Ford Magazine, I collaborated with the new EFI group at Holley and we put a pair of their throttle body injectors on the factory dual-quad manifold. Thus the necessity for a return line.

Somewhere around here I still have a copy of Mustang Illustrated Magazine with a story I did about street-racing the Mustang. Maybe I'll dig it out and do a post in the non-tech section, if it's all right with Jay.

KS

[Bolted to Floor]

Ross,
Point well taken on the impact switch. One of those will be installed.

Cammer,
Sounds like a wild ride. Thanks for sharing.

[Russ67Scode]

Gas tank has a drain fitting that could also be used as a return

[cammerfe]

With the drain fitting on the bottom of the tank, a return line there will have to push against the 'head' of the fuel in the tank. The return line should go in the top of the tank so as to have no 'head' to push against.

KS

[jayb]

I don't think that where the drain line enters the tank is all that important.  The return fuel is under pressure, after all.  All the Aeromotive tanks and partial tanks put the return line into the tank at exactly the same level as the feed line, right at the bottom of the tank.  I've been using those for years, with carbureted and fuel injected systems, with no problems.