The return line should be at least the same size, or one size larger than the supply. Make sure there are no sharp bends or kinks. The return line should direct fuel close to the bottom of the tank and away from the pickup.
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Keeping this in consideration, what size fuel line do I need?
Most stock applications came with 5/16-inch fuel line, but for many street vehicles and mild race applications 3/8-inch (AN 6) fuel line is a good upgrade. High performance applications and racers using alcohol will use 1/2-inch (AN 8) fuel line.
Additionally, which fuel line is the return line? 2. The second line is a clear yellow line. This line is the return line and it connects from the fuel tank grommet to the purge pump body to the connector closest to the air filter.
Similarly one may ask, can a fuel line be too big?
Going nowhere fast. However, in fuel line we are talking about diameters in fractions of inches and line length in multiple feet, so wall friction tends to dominate. Assuming everything is sized correctly, you cannot be too big with a remote pump/regulator set up.
What size is an line?
Russell Performance Technical Support
| AN Size | Metal Tube O.D. | Thread Size |
|---|---|---|
| -3 AN | 3/16" | 3/8" - 24 SAE |
| -4 AN | 1/4" | 7/16" - 20 SAE |
| -5 AN | 5/16" | 1/2" - 20 SAE |
| -6 AN | 3/8" | 9/16" - 18 SAE |
How much horsepower does a 3/8 gas line use?
Based on this, a 3/8" fuel line should be adequate up to about 450 horsepower (assuming a carb and a mechanical fuel pump).How much horsepower will a 3/8 fuel line support?
A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”!How much pressure does a fuel line have?
Working pressure is not relevant, but wire-inserted hose can withstand 50-85 psi, depending on diameter. High-pressure fuel hose for clamp-type fuel-injection systems is also available. This fuel hose is SAE 30R9-rated and uses a fluoro elastomer inner liner that will withstand up to 180 psi and 300 degrees.What can I use for a fuel line?
The best solution is a material called PTFE. That stands for polytetrafluoroethylene—a plastic material that is best known as Teflon in one specific variation. This material is impervious to the degenerative effects of fuel that also creates a vapor barrier so fuel vapors cannot leak past.What size is 8an fuel line?
The Good News| Male Thread Size | AN Size* | Equivalent Tube Size (Nominal OD) |
|---|---|---|
| 3/8-24 | 3AN | 3/16" |
| 7/16-20 | 4AN | 1/4" |
| 9/16-18 | 6AN | 3/8" |
| 3/4-16 | 8AN | 1/2" |
How much horsepower will a 5/16 fuel line support?
If you're just cruising around with a carbed SBC, you'll probably be fine with a 5/16" line up to about 500 HP because you'll never tax the system enough to starve the motor of fuel.What size is 6an fuel line?
FYI: Popular fuel line sizes: -6AN (=3/8″ OD) -8AN (=1/2″ OD) -10AN (=5/8″ OD)Which fuel line goes to the primer bulb?
The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb. The return line (blue) comes from the long post on the back of the primer bulb and goes into the bottom of the fuel tank.Do you have to have a return fuel line?
You don't really "need" a return; but the car will work better if it has one, on the street. The fuel pump pressurizes fuel to send it to the carb. If the engine isn't using much fuel (sitting still idling for example) the fuel in the line will be mostly just sitting there, getting hot.How do you install a primer bulb?
Reviewing these steps will likely help with primer bulb replacements on other engines.- Access the carburetor.
- Unscrew the two carburetor mount screws.
- Remove the old primer bulb.
- Clean the carburetor and primer bulb components.
- Install the new primer bulb.
- Remount the carburetor.
Where does the fuel line go on a carburetor?
Feed the line in through the gas tank, pull the fuel line into the gas tank and attach the weighted fuel filter to the end of the fuel line and the filter should lie in the bottom of the tank. The larger diameter fuel line connects to the other remaining fitting on the carburetor.How do you determine your fitting size?
Measure the Outside Diameter (OD) of your pipe or pipe fitting:- Wrap a string around the pipe.
- Mark the point where the string touches together.
- Use a ruler or measuring tape to find the length between the tip of the string and the mark you made (circumference)
- Divide the circumference by 3.14159.
