![]() ![]() “If the only way to route the vent line high enough is to go into the passenger compartment, then using something like our in-line vent valve may be necessary. “Do not vent into the passenger compartment,” he said purposefully.ĭo not vent into the passenger compartment! There have been times when we’ve witnessed fabricators routing fuel lines and fuel tank vent lines through the passenger compartment. Some distributors offer complete fuel tank kits like this one from Tanks Inc. Running a vent line is a safe way to combat the higher vapor pressure. Temperature goes up and vapor pressure rises as well. As we have already discussed, vapor pressure is directly proportional to temperature. As a result, this heat transfer raises the temperature of the fuel a few degrees. Internal pumps use the fuel to cool themselves. “Additionally, if an internal pump is added to the system there will be more venting required than what a stand-alone vented cap can provide.” “With today’s modern fuels, the alcohol and additives create a fuel that expands much more than what it used to years ago when vented caps were common, he said. With today’s modern fuels, the alcohol and additives create a fuel that expands much more than what it used to. You can even get an OE-vented, locking-style gas cap! If you pony up the cash and buy a vented cap, most enthusiasts would assume that would eliminate the need to run a vent line from the gas tank. There are the standard OE-type caps, locking-type caps, or vented-type caps. What About Vented Gas Caps?Īs anyone that has had to shop for a replacement gas cap can tell you, there is more than one kind of gas cap on the shelves. With modern fuels, this may not be the answer to all of your vapor pressure problems. Twist on gas caps, like this one from Tanks Inc., may be offered in a pressure vented style. “The other issue that we do sometimes run across is simply the filler neck does not have enough drop in it to allow for fuel to gravity feed to the tank,” he added, “Or there are too many tight bends causing the fuel to flow slowly.” “This oversized filler neck allows for air to escape during filling,” he pointed out. Here are a few examples of different tank filler necks from Tanks Inc.Īccording to Justin, the standard 5/16-inch line commonly used as fuel tank vents, “is not enough to properly vent a tank during filling.” However, most enthusiasts don’t realize this because the tank’s filler neck is larger than the fuel pump nozzle. Some fuel tank necks come with integral vent lines. Higher pressure can lead to dangerous conditions like tank bulging, fuel line leaks, fuel pump problems, insufficient fuel to the engine, or potential fire hazards when opening the filler cap. ![]() It is these changes in volume due to temperature changes that make gas tank venting necessary.”īasically, an automobile’s gas tank or fuel cell will build pressure naturally. “The change in air and gas volume in a tank will greatly change with temperature change and probably more so than what most people realize. The change in air and gas volume in a tank will greatly change with temperature change, and probably more so than what most people realize. Additionally, the air inside of a gas tank also changes in volume with temperature changes,” he says. “Gasoline expands and contracts with temperature changes. According to Justin Somerville, the general manager at Tanks Inc., thermal expansion in a fuel cell is a big deal. In automotive terms, thermal expansion works a little differently. Moonshiners capture the vapor and using a vent line, route the vapor to another vessel where it is cooled, and transitioned back to a liquid state.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |