Sylvie Willis
The size of a 6AN fuel line is a standard outer diameter of 3/8 inches or 0.35 inches and is widely used in fuel lines, return lines, fuel pumps, and more. The AN in 6AN is an abbreviation for Army-Navy and was first used by the US military during World War II to set specification standards for fasteners and fluid fittings on military equipment. Today, 6AN fuel lines are popular for automotive applications, with many customers opting for the EVIL ENERGY 6AN Fuel Line Kit for its durability, ease of assembly, and value for money.
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What You'll Learn
The meaning of '6AN'
The meaning of 6AN
The "6AN" in "6AN fuel line" refers to the size of the fuel line. More specifically, the "AN" in "6AN" designates the outer diameter of the hose or tubing in 1/16-inch increments. In this case, "6AN" means that the hose has an outer diameter of 6/16 inches, or 3/8 inches. This size is commonly used in fuel systems and is known for its ability to provide adequate flow without introducing any significant restriction.
The "AN" in "6AN" stands for "Army-Navy," which was a specification standard set by the US military during World War II for fasteners and fluid fittings used on military equipment. After the war, surplus aerospace parts were often used for racing, and this introduced the AN standard into the high-end racing and performance world. Today, the AN standard is commonly used in fuel lines and fittings for racing and performance fuel delivery systems.
The 6AN fuel line is known for its durability and ease of assembly and installation. It is often made of braided nylon, which provides reinforcement and ensures a steady fuel pressure. The fittings and hoses are also well-regarded for their quality and reasonable price. The 6AN fuel line is compatible with various fluids, including racing fuels, ethanol-based fuels, diesel, bio-diesel, methanol, and ethanol/gasoline mixtures.
It's important to note that the AN standard specifically refers to the outer diameter of the hose or tubing. This is in contrast to AN bolt sizes, which translate directly to bolt OD in sixteenths of an inch. To differentiate between the two, the convention is to place the "AN" before the bolt size but after the plumbing size, such as "6AN hose" or "AN4 bolts."
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The use of 6AN fuel lines
The 6AN fuel line is a high-performance fuel line with a wide range of applications. It is commonly used in automotive and racing contexts, providing a safe and reliable means of delivering fuel to engines. The 6AN fuel line is constructed with a durable and lightweight design, featuring a braided nylon exterior and a smooth bore Viton Fluoroelastomer (FKM) inner layer. This construction ensures compatibility with various automotive fluids, including fuel, engine oil, gear oil, transmission fluids, coolants, and more.
One notable advantage of the 6AN fuel line is its resistance to deterioration and permeation. It is designed to withstand the presence of ethanol in gasoline without drying, hardening, or emitting fuel vapors. This makes it suitable for use with racing fuels, ethanol-based fuels (E85+), diesels/biodiesels, methanol, and ethanol/gasoline mixtures. The 6AN fuel line also offers a significant weight advantage over traditional stainless steel braided hoses, being approximately 33% lighter while maintaining superior abrasion resistance.
The 6AN fuel line is widely available in kit form, typically including 10 feet of hose and the necessary fittings. It is known for its ease of assembly and installation, making it a popular choice for automotive enthusiasts and mechanics alike. The clear instructions provided with the kit further enhance the overall user experience. The quality of the hardware tubing is well-regarded, offering durability and solid fittings at a reasonable price.
In addition to its automotive applications, the 6AN fuel line is also suitable for marine use. It conforms to the USCG Type A1-15 SAE J1527 standard, making it appropriate for supplying fuel to boat motors. Furthermore, its heat and oil resistance make it ideal for providing a safe connection between the oil cooler and the transmission or engine. Overall, the versatility, performance, and ease of use of the 6AN fuel line make it a preferred option for a variety of fuel system applications.
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The benefits of 6AN fuel lines
The 6AN fuel line is a popular choice for automotive enthusiasts and mechanics due to its versatility, performance, and ease of installation.
One of the key benefits of the 6AN fuel line is its compatibility with various vehicles and applications. It can be used with ATM and OMG carburetors, carburetors with dual metering blocks, and 7/8"-20 threaded ATM fuel bowls. This versatility allows users to upgrade their fuel systems without significant modifications.
The 6AN fuel line also offers superior performance compared to larger options, such as the 8AN. Its smaller diameter results in reduced volume, which means the fuel pump doesn't have to work as hard to maintain proper fuel pressure. This makes it capable of supporting a significant amount of power. Additionally, the 6AN fuel line's reduced diameter can make it easier to route through the vehicle, requiring fewer bends and fittings that can restrict fuel flow.
Another advantage of the 6AN fuel line is its lightweight construction. For example, the RaceFlux RH1 lightweight racing hose is 33% lighter than traditional stainless steel braided hoses. This weight reduction can lead to overall vehicle weight savings, which can improve performance and fuel efficiency.
The 6AN fuel line is also known for its ease of assembly and installation. Many users appreciate the clear instructions provided with the fuel line kits, making the process straightforward. The lightweight construction of the 6AN fuel line also contributes to easier handling during installation, and its flexibility allows it to navigate tight spaces more easily.
Lastly, the 6AN fuel line offers excellent durability and value for money. Users have reported that the 6AN fuel line kits provide good quality fittings and hoses at a reasonable price. The nylon-braided construction of some 6AN fuel lines, such as the EVIL ENERGY 6AN Fuel Line Kit, contributes to its durability and resistance to fuel permeation. This ensures a long-lasting and reliable performance, even in the presence of ethanol in gasoline.
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The installation of 6AN fuel lines
A 6AN fuel line is 3/8 inches in outer diameter and is often used in fuel lines, return lines, fuel pumps, and EFI systems. It is a common size for fuel lines and is available in different materials, such as stainless steel, black nylon, and lightweight racing hose.
To install a 6AN fuel line, you will need the following supplies:
- 6AN fuel line kit: This typically includes the fuel hose and hose ends. Kits are available in different lengths, so choose one that best suits your needs.
- Tools: You may need tools like a Koul Tool or aluminum vice inserts to hold the hose and fittings in place during installation.
- Tape: Use tape to wrap the hose and create a straight edge against the AN fitting. This helps to identify any leaks during installation.
- Lubricant: A lubricant like WD40 or silicone spray can be applied to the fittings to make it easier to connect the male and female ends.
- Prepare the fuel line: Cut the fuel line to the required length, ensuring that you have enough hose to reach the desired components.
- Clean the hose and fittings: Before assembly, clean the hose and fittings to remove any debris or contaminants that may cause issues.
- Tape the hose: Wrap tape around the hose, ensuring that the straight edge of the tape is aligned with the AN fitting. This will help you identify any leaks during installation.
- Lubricate the fittings: Apply a small amount of lubricant to the male and female fittings to make it easier to connect them.
- Connect the fittings: Screw the male and female fittings together securely. Ensure that the hose does not get pushed away from the inside lip of the fitting, as this can cause leaks.
- Test for leaks: Once the fittings are connected, check for any signs of leaks by observing the tape and fittings for any fuel residue or drips.
- Assemble the fuel system: Connect the fuel line to the relevant components, such as the fuel pump, carburettor, or fuel injectors. Ensure that all connections are secure and tight.
- Final testing: Once the fuel line is installed, test the system for leaks again and ensure that the fuel flow is consistent and steady.
It is important to note that the installation process may vary slightly depending on the specific components and applications. Always refer to the manufacturer's instructions and take the necessary safety precautions when working with fuel systems.
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Where to buy 6AN fuel lines
If you're looking to buy a 6AN fuel line, there are a few options available to you. One popular choice is the EVIL ENERGY 6AN Fuel Line Kit, which includes 10 feet of braided nylon fuel hose in black. This product is widely available, with retailers including Amazon and Pegasus offering it for purchase. Customer reviews for this product are generally positive, with many praising its durability, ease of assembly, and good value for money.
Another option is the RaceFlux Lightweight Nylon Braided Viton Hose, which is also NHRA-approved for use with racing fuels and other automotive fluids. This hose is sold by the foot and features a smooth bore Viton FKM fluorelastomer rubber inner layer, making it compatible with a wide range of fluids.
If you're looking for a more traditional option, you can also find 6AN fuel lines made from stainless steel. These are often sold as part of a kit, which includes the necessary fittings and hoses for installation. Prices for 6AN fuel lines can vary depending on the retailer and the specific type of fuel line, but they generally range from around $20 to $40.
When purchasing a 6AN fuel line, it's important to consider the specific requirements of your vehicle and the type of fuel you will be using. It's also a good idea to read reviews from other customers to get a sense of the quality and ease of installation of the fuel line.
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Frequently asked questions
A 6AN hose has an inner diameter of 3/8 inches and an outer diameter of 5/8 inches.
The "AN" in 6AN stands for "Army-Navy", which was an abbreviation used by the US military during World War II to set specification standards for fasteners and fluid fittings used on military equipment.
The inner diameter of a 6AN fuel line is 3/8 inches.
