Fuel tank vent puking gas !!

[DRJDVM's '69]

I recently installed a Rick stealth tank and am having issue with the vent tube puking fuel.

I have an older style where the vent hole is in the front near the sender. I got the valve Ricks supplies that drops in that hole (its like a tube with a ball valve in it) and have about a foot of hose coming off it. I looped it once and mounted the end about 4 inces above the top of the tank level. I then put a "K&N type" breather on the end to help with the fumes. I'm using the gas cap that came with the tank.

It still seems to puke gas out of the vent. I keep getting gas all over the tank and the rearend.

Obviously alot of guys on here run the Ricks tank, so what are you guys doing????

The only thing I can think of is running a hard line, looping it 3-4 times and trying to mount the top even higher. If anyone has pix of what they did, that would be great....

[kennyd]

i am having the same problem , i just have not had time to fix it yet .

[Blown353]

Ned, I have the same issue with my Rock Valley tank, but only when it's over 3/4 full and it only slightly drips. What I did for now is to put a fairly sizeable fuel filter in the vent line, pointing upright and as high as possible under the car to collect most of the fuel "puked" out of the vent. I also bent some hardline and ran the vent all the way back to the bumper just by the license plate so when it does puke it does directly down to the ground.

The real solution that I'll fab up this winter will be to install another vent on the filler neck and run both vents to a small surge/overflow tank hidden up behind the bumper that is above the level of the fuel tank; it will catch and collect the fuel that comes out of the vent and allow it to drain back to the tank via one of the two vent lines. There will be a vent on the top of the surge tank obviously. A small surge tank, even 1/2 quart capacity should do the trick.

i have the same annoying problem with my ricks tank, and someone else i know with one as well

[awr68]

So if you are using a factory vented cap can you just plug the vent at the tank so it's not an issue?

i found this on weldons site

10. Does my fuel tank need to be vented?
Yes, the fuel tank or cell requires venting to the outside of the vehicle. Do not use a vented gas cap in lieu of a true tank or cell vent

[Blown353]

Originally Posted by surreyboy

i found this on weldons site

10. Does my fuel tank need to be vented?
Yes, the fuel tank or cell requires venting to the outside of the vehicle. Do not use a vented gas cap in lieu of a true tank or cell vent

Very true. Too small of a vent, especially for an engine that can consume a LOT of fuel quickly can result in either the pump "stalling" out and cavitating from vacuum in the tank or you can actually start collapsing the tank!

[awr68]

good to know...thanks guys!!

[Siv]

I liked Blown353's idea so much I made one. It's not hidden behind the bumper, but instead in the trunk.

Here's the basic idea


Welded up a small tank. It's a frankentank made from lesser failed projects.


Fabbed up a quick mounting bracket


I don't know if this is the best place to mount it, but it doesn't look bad in my opinion.






From under the car. The fuel hose fits perfect between the ribs of the trunk and tank.


Seems to be working great so far and no burps or fumes.

[Musclerodz]

the issue is too much pressure in the tank. constant return with corvette regulators does not help either, keeps the pressure in the tank up. we have the same issue here on rock valley tanks as well. I am hoping the vaporworx setup will solve some of the issue, but doubt it will solve puking when tanks are near full. charcoal or vapor cans is the only way to properly fix it.