67 filler neck replacement or fuel cell

[1967stang302]

I've been having the trouble of filling my gas tank. Takes me 10 minutes or more to fill my gas tank, first I posted on how to fix that, no one knew, they just said it was a problem that happens with 67's and that they fized it in later years. Now I am thinking to bypass the filler neck altogether. I'm thinking of going to a fuel cell. But the ones I see are too expensive, I'm thinking my max would be about $200 for a fuel cell that has a cap built in so my gas cap would just be for looks.

Would be nicer if anyone had an idea of how to fix the filler neck so it doesn't overflow if I try to fill more than an ounce a minute. Any ideas? That would be the best way to go if anyone knows how to fix that?

 

[1320stang]

Well, not for filling purposes, but for security, I 've known guys that have removed the filler neck and spun it 180 degrees and put it back on so that it pokes straight up in the trunk. It should help in filling it as well, but you stand a chance of spilling gas in your trunk and the Mustang gas gaps are vented, so there's another worry. You might find a late model filler neck that has a vent tube off the side you could vent to the outside to do this as well.

As far as the hole left over after you do this, everyone I've seen do this has a flip down gas cap or has bought and installed one in place of the screw on one. Although one guy drag races his and put an aluminum plate with a battery cut off switch there.

If you put a fuel cell in, and you drive on the street, you'll want one with a fuel sender in it and that's even more $$$, plus, if you race, you'll need to build a steel box around the cell as they no longer allow plastic tanks exposed to the exterior at most sanctioned tracks.

On a side note, my sending unit would throw out bad signals, when it was full, it'd only show half full, and it'd go down normally, but when it showed empty, it still had half a tank. Went to replace the unit and found one of the springs that goes around the end of the gas nozzle had fallen off and wound itself around the float arm.

Just noticed, your in Cali, don't you guys have some funky nozzle system that make it hard to fill up anyway?

 

[1967stang302]

thanks for the info, not exactly sure what you mean by turning the filler neck around 180, do you mean turning it so the top points toward the from of the car? Would venting it really help that much? I am in Cali and we do have some funky pumps here, but Mobil gas stations don't have the pumps with the 10" long spring you gotta compress to pump. Why do they make it so hard to fill up my gas guzzler, do these oil companies not want my money? My mechanic mentioned using a EFI gas tank because of the vents. He said he is using a '72 tank I think and he is no longer having the probem.

 

[thehueypilot]

I have the same issue and I was thinking about installing a late model nozzle restictor to my current filler tube. My 2000 F-250 diesel truck had one that I knocked out because the high volume pump nozzles would not fit. Too bad I destoyed to get it out, but it gives me a place to start. That should keep most of the gas from blowing out.

 

[1967stang302]

I have the same issue and I was thinking about installing a late model nozzle restictor to my current filler tube. My 2000 F-250 diesel truck had one that I knocked out because the high volume pump nozzles would not fit. Too bad I destoyed to get it out, but it gives me a place to start. That should keep most of the gas from blowing out.

this sounds like a great idea. anyone know which one would fit best in the filler tube? has anyone tried this? And one more question, one person sent me a pm that said to switch to a EFI tank, does this help? and can I use a efi tank with a carbed setup no problem?

 

[gingerbreadman]

isnt a big part of the problem the fact there isnt a large breather tube to let the air out as rapid as the gas goes in when filling at the pump? I know on my 77 f250 i had to work some funky filler necks for the tanks when i put the aftermarket stepside box on it and there was a large 1 inch inside diameter hose coming off the tank and attached back to the filler neck up high right near where the nozle is. probley no need to route it back to the nozzle tho, you could just vent it to atmosphere since these systems were anyways, if you do this youll have to make a new spout on the tank for the hose to attach to. this will require cutting and welding your gas tank id recomend brazing any part of the tank or filler neck as it flows and seals better then mig or stick welding it.



-gbm-

 

[gingerbreadman]

is there anyway you can get me pictures of the filler neck and gas tank ?????




-gbm-

 

[70XR7ConvertCat]

this sounds like a great idea. anyone know which one would fit best in the filler tube? has anyone tried this? And one more question, one person sent me a pm that said to switch to a EFI tank, does this help? and can I use a efi tank with a carbed setup no problem?

I don't know what an EFI tank is going to buy you. The problem you have is likely related to venting. An EFI tank may offer a separate vent line, much like a fuel cell, but I wouldn't count on having an unlimited number of choices. Either way, you're going have to deal with fitment issues, so you can't just use any old tank. EFI tanks have a provision for a fuel return, so you'd have to block that off.

I'm currently running a Fuel Safe 22 gallon fuel cell in my '67 Cougar which is a 5.0L EFI and I'm having the same problem as yourself. What I need to do is make sure the proper valve was installed for the vent line. Then, I may possibly need to loosen the tank flapper valve so the fuel doesn't back up the short filler neck on these cars. You don't have such features to work around. On your next fill up try to make sure the the fill neck opening is not covered by the rubber boot which surrounds the nozzle. That will allow the air to be displaced, and may not trip the shutoff as readily.