I have a SS gas tank that has a 5/16" line at the top right side of the tank. I want to put a breather on the line, like a charcoal filter so I wont smell the fumes and it will act as a vent also. Does anyone have this type setup and what kinda filter did you use. I have seen where they adapted a valve cover breather to the line. Anyone have a recommediation???

Out of all the SS tanks nobody has a vent on them or have gas fumes in there garage?

Mike,

I just got my stainless tank a couple of weeks ago and was wondering the same thing. I found some info on Protouring.com/ any thing from a hose to a sintered bronze fitting to running vacuum from the engine and running the vented line to a charcoal canister.
http://www.pro-touring.com/forum/forumdisplay.php?f=31 Use this link and search the for "vent"

That vent is to small for most applications anyway. I'm running a 1/2 fuel hose to a K&N. It works well except at full tank. I'm going to be plumbing in a air fluid seperator and place it in the trunk with another line back outside the trunk with a K&N.

I'm using a '68 vented gas cap, so I just capped the vent line on my stainless tank.

If you use the vent line, you need a CHECK VALVE. The vent is only there to let AIR IN. It should NOT let anything OUT.

And yes, you SHOULD get a big whoosh of pressure escaping when you remove your fuel cap on a warm day.

Completely disagree with you. Fuel that the engine consumes must be replaced by air. (That's why the pressure builds and causes your whoosh) In a high performance application your vent should be equal to your feed line otherwise you can create a vacuum(Whoosh) and stand the chance of a vapor lock. When the car heats up or sits in the sun gas will expand and it should also be able to vent which is probably what your 68 fuel cap allows.

My buddy did some research on the gas tank vent issue. Its his car. His concern is that some tanks have over pressured. That is why we want to put a vent on it. To keep the pressure out of it.

Another thing is I have a fuel cell in my camaro and you can smell gas sometimes in my garage. We are trying to eliminate that also. Not just plug the piece of tubing.

Has anyone else read about over pressure in the SS gas tank.

Also thanks for all the ideas.

I don't get the gas smell unless it's really hot. New cars smell like gas when they purge as well.