I have to install a small vent tube from my Fuel tank out. I have a 32 style tank and I would like to see various vent tube style that everyone is using and how you are having to mount it on the underside of your car. Thanks for the help Frenchy
If there is no room under the car run hose up into the trunk and loop it back down under the car to keep it higher than the tank.
Hi neighbor! I put a small clear fuel filter on the end of a short piece of rubber hose and zip tied it to the frame.
Hi Miles I will be putting the body on the frame this Saturday morning. Thanks for the heads up on the vent tube idea. Frenchy
Running a sizable vent tube - #6 or #8 - like the drag race gang does, you need to do more than simply running it up into a loop and down again. With a JAZ fuel cell inside the 32 roadsters trunk, the #6 vent line went from cell up to the highest spot in the trunk, turned down, then out through a grommeted hole in the floor. Worked fine except for the smell of gas inside the garage. Checking the end of the vent line I found it was emanating fumes and it was a pita to work under the car with fumes present. The cure was to add a small metal charcoal cannister - from under the hood of an 80's or so Toyota pickup, run the vent line to that, out and forward alongside the frame using Adel clamps to mount the line on the external inside of the boxed frame. An Earl's inline fuel filter was installed - the one with stainless screen and not the ceramic filter. The inline filter is very similar to the flame arrestor on the Acetylene line of an Oxygen-Acetylene gas torch setup. From there it went to the inside of the carb's air filter. Very similar to what Detroit did when they ran the charcoal cannister line to the inside of the air filter. The setup works well, no fumes in the garage or under the car when you work on it. No problems with backfires either.
Thank You C9 great investigation of this subject. I want to do this before I install the body on the frame this weekend. Take care Frenchy
You're welcome. I was going to post a pic of the metal cannister, but can't find it. Figures, I have about 1500 pics and that one's gone missing. Anyhoo, one thing to add about using the cannisters, they can be a safety device when fueling. Part of it depends on where they're mounted and under the hood could be a problem. Under the body is a good way to go. Several years back I was fueling the 32 with one of California's seal-off gas fillers. (We don't have em out here.) Anyhoo, was talking to a co-worker and he spotted gas coming out of the car. I thought the auto-shutoff didn't work, but it was a problem with the station's venting system. I shut down fueling and the gas coming out of the cannister - mounted behind the rear axle - tapered off pretty quick. A Ford pickup a couple of pumps away was doing the same thing. Never did find out what was going on, but the girl mentioned having problems with the vent system the day before. It was nice that the cannister dumped the excess gas overboard. Woulda been a ***** if it had filled up the engine....
I brazed a 90 degree fitting into the top of the tank, put a small round hole in my trunk floor, screwed another fitting into the top of the wheel well (from inside the car to the outside), then ran a rubber hose between the two.
Robster Thank You for your idea actually this is what I have done as you sugested should be OK . Frenchy
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