Need suggestions for venting my fuel tank

I would like to do the hoses so it is hidden, and simple. Where should I go with the hose and how should it terminate, just open, or with some kind of filter or one-way valve?

Currently, the metal tube coming out the top of the tank is corroded closed, so I will have to drill it out. I left it that way, and threw away all the cannisters and hoses that were attached.

Actually, I would rather use a vented cap and not drop the fuel tank (again). So...any suggestions would be greatly appreciated...and quickly, because the tank is empty and I cannot drive it right now.

I replaced the last 4" chunk of original fuel line just under the driver door, cut some of the metal pipe off and put in a fuel filter there, to filter it before the fuel pump.

Then, took the fuel pump apart, cleaned it all out, just in case there was some gunk in there slowing down my flow/pressure. It looked pretty clean. Put it all back together, and straigtened out some of the curves that the fuel line made to make it less "pinched".

May not have solved any problems, but surely couldn't have hurt anything :16suspect

 

so get a vented cap if you want will early mustang fit? does early mav get a vented cap? if not then clean out the tank vent and run a line from it up into the side of the trunk or something. i just left the end of the line hanging on the front edge of the tank.

 

i have a tank out of a 73. it still has the top vent. you can have it if you come and get it.

 

I have the top vent...I just need to know where to run it. I assume that if I just open it up, it will spash fuel out while I drive. Where can I run a tube where it will be higher than any splashing gas and not leak out when I drive...plus, no fumes near any hot parts, like headers. Don't want a flame thrower under my car.

Speaking of flame throwers...my dad says you can hook up a spark plug at the exit of your exhaust and with the flip of a switch throw flames out your exhaust...Is this true, or is he pulling my leg?

 

like i said, i just left mine at top front edge of tank. no slosh, or leaking that i know of.

there's a bit more to it, but basically, thats how you do the flamethrower bit.

 

i did the mustang tank swap.i'm using a vented gas cap

 

this what i did to mine and put a plastic fuel filter in the end of the line to keep trash out...frank...

 

I was thinking of doing this to mine too...my thought was to remove the metal filler spout and put a little fitting on the side of it, to which i'd attach some line and put a check valve in it (so air could get into the tank, but fumes could not vent out into the trunk). I dunno...

 

i think the vent is to work both ways...(let air out to stop pressure build up)and (air in when it is pulling gas when running so vac. doesn't build in the tank).
...frank... )

 

So I just need to keep the hose/filter configuration at the top of the tank and higher than the gas by a few inches. Right?

Sounds easy enough. The filter, especially if pointed upwards, should keep all sloshing out to a minimum, if not completely stopped.

 

yup. mine's not even a few inches. the tank doesnt really fill to the very top.

 

I don't have anything going to the vent on mine. My car is a daily driver, never had a problem with it sloshing out. But I rarely fill mine above 3/4ths of a tank...

 

Update...I drained the tank the fun way (excessive displays of force and power and some "drifts" around corners, especially when 2nd gear hits ) over the weekend. It took 1/8 tank to get to my parents house about 40 miles away, then the remaining 5/8 tank to get home. It is really nice that I can putt around and drive highway at 20+ mpg, then hit the pedal and LITERALLY watch the needle drop, losing 1/8 tank in 5 miles

ANYWAY, I dropped the tank, replaced that last little 4" long piece of stock rubber hose right below the driver-side door, cut that metal line back about 6", installed an inline clear filter prior to the mechanical pump, disassembled and reassembled the mechanical pump (found no gunk or chunk, but when I opened it up, there was a little bit of clear-brown gas in there), shortened and replaced the fuel line going from the fender to the pump that had a little bit of kink in it, took off and drilled out the tube in the vent in the top of the tank that was corroded closed and topped off with the epoxy coating I put in the tank, and added a 3" long tube capped off with a small clear plastic fuel filter at the vent tube. WHEW!

I don't know how I made it to the gas station, since I had pressurized the tank blowing out all fuel, then dropped the fuel line at the tank and nothing came out. When I dropped the tank, I could feel a little gas in there, but couldn't have been more than a couple of cups full. Got to the station, added half a tank (and a 6-pak ) , test drove it, and pressure stayed at 6 psi with an occassional dip to 5 when I gunned it.

Don't know what, if anything, I did to fix the problem...I am guessing that there were multiple problems all adding to the issue (such as the light kink, dirty fuel in pump, no venting) and doing all of this may have solved the problem. Won't know for sure until I do the rounds around town, and I will be sure to go to the places that always cause problems, like the teller line at the bank, Wal-Mart parking lot, etc.

Thanks for all suggestions and help

 

Not to hijack the thread...
Doesn't the stock cap do that? I know mine has a hole in the center. I just didn't know if it let enough air IN.
My only concern was if air was allowed in and out, the fumes could potentially build up in the car. But i guess an external line would fix that

 

My stock delux cap does not vent.

I don't understand how fumes would build up in the car unless your running your vent inside of the trunk or something. Seems to me that would be extreamly dangerous and possibly pose a risk of explosion. Talk about kissing your ass goodbye...