Katerina Swanson
Fuel lines are an essential component of any vehicle, responsible for delivering gas from the storage tank to the engine. Also known as fuel hoses, they can be made from a variety of materials, including metal, rubber, braided nylon, braided steel, PTFE-lined, or plastic. Plastic fuel lines, for instance, are lightweight and don't perish, but they melt at lower temperatures and are more challenging to repair. In contrast, steel pipes are strong and affordable, yet susceptible to corrosion, which can lead to fuel leaks. Understanding the different types of fuel lines and their unique characteristics is crucial for vehicle maintenance and ensuring a worry-free driving experience.
| Characteristics | Values |
|---|---|
| Material | Nylon and stainless steel |
| Length | 16.4 ft |
| Heat resistance | High |
| Corrosion resistance | High |
| Abrasion resistance | High |
| Flow | Constant |
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What You'll Learn
- Metal fuel lines are the most durable but can be difficult to fabricate
- Rubber fuel lines are flexible and easy to install but can become hard and brittle over time
- Braided fuel lines are flexible but prone to leaks if the braid becomes damaged
- PTFE-lined fuel lines are durable and resistant to wear, heat, and chemical damage
- Plastic fuel lines are lighter than metal tubing but melt at lower temperatures
Metal fuel lines are the most durable but can be difficult to fabricate
The durability of metal fuel lines comes from the material's resistance to abrasion and corrosion. Stainless steel, in particular, is known for its ability to withstand extreme temperatures and harsh environments, making it ideal for fuel systems.
However, the fabrication of metal fuel lines can be challenging due to the material's hardness and the need for specialised tools and techniques. Bending and shaping metal fuel lines require precise measurements and careful execution to avoid kinks or weak spots that could compromise the line's integrity.
Additionally, metal fuel lines tend to be more expensive than other options, such as nylon or rubber hoses. Despite the higher cost, metal fuel lines are often chosen for their superior durability and performance, especially in high-performance or racing applications where reliability and safety are critical.
Several companies offer custom-made metal fuel line hose assemblies, including Raceflux, which provides lightweight nylon-braided Viton hoses and stainless steel-braided AN hoses. These custom-made hose assemblies ensure a precise fit and optimal performance for specific applications.
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Rubber fuel lines are flexible and easy to install but can become hard and brittle over time
Fuel lines are an essential component of any vehicle's fuel system, delivering fuel from the tank to the engine. There are a variety of fuel line options available on the market, each with its own unique advantages and disadvantages.
One popular option is braided fuel lines, which offer enhanced protection against abrasion and corrosion. Braided fuel lines are ideal for street and race environments where durability is key. They are designed to withstand the rigours of competitive motorsports, ensuring your fuel system remains intact even in the harshest conditions.
Another option is PTFE fuel lines, which represent the pinnacle of fuel line technology. PTFE lines are resistant to chemicals and extreme temperatures, ensuring efficient and uncontaminated fuel delivery. PTFE fuel lines are the choice of enthusiasts and professionals alike, demanding the highest level of performance and reliability.
When choosing a fuel line, it is important to consider the specific requirements of your vehicle and the environment in which it will be used. For high-performance racing applications, durability and resistance to extreme temperatures are key factors. On the other hand, for everyday reliability, ease of installation and leak-free connections may be more important considerations.
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Braided fuel lines are flexible but prone to leaks if the braid becomes damaged
Braided fuel lines are flexible and can be made from nylon or steel. However, they are prone to leaks if the braid becomes damaged. This can happen if the line is pressurised, or if the rubber inside degrades, cracks and fails. This is similar to the way an old tire would degrade.
Some braided fuel lines are not rated for some uses, and this can cause leaks. For example, if the line is not rated for alcohol usage, it can be damaged by ethanol in the fuel.
Braided fuel lines also have a life expectancy and should be replaced every few years. It is important to buy from a known supplier, as some vendors sell old lines that are not safe for use.
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PTFE-lined fuel lines are durable and resistant to wear, heat, and chemical damage
8AN refers to the diameter of a fuel line. PTFE-lined fuel lines are durable and resistant to wear, heat, and chemical damage. They are ideal for street and racing applications where E85, gasoline or methanol compatible fuel lines are needed. PTFE fuel lines provide outstanding flow capacity and are smaller on the OD for the same ID of a comparable rubber braided line for easier routing in tight spaces. They also deliver extended service life in any fuel as they will not harden, micro-fracture or permeate fuel vapour (vapor-walk) like normal rubber braided lines, minimising fuel smell in the vehicle storage area. The stainless steel outer braid provides impact and abrasion resistance and protects the PTFE inner liner.
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Plastic fuel lines are lighter than metal tubing but melt at lower temperatures
Fuel lines are used to transport fuel from the tank to the engine bay. Modern vehicles may be fitted with fuel lines made of plastic, typically nylon. Plastic fuel lines are lighter than metal tubing, but they melt at lower temperatures and cannot be repaired as easily.
Plastic fuel lines are often used in FF or FR vehicles with fuel tanks at the rear. These vehicles require a rigid fuel pipe that can run the length of the chassis. While steel pipes are cheap and strong, they can corrode and cause fuel leaks. Copper fuel pipes, which are found in older vehicles, are easy to fit and repair but are heavy and expensive compared to other options.
Plastic fuel lines, such as the Raceflux Custom Made Hose Assembly, are available in various materials, including nylon and stainless steel. These lines are designed for racing and offer lightweight construction with braided viton or PTFE hoses.
The melting point of plastic is a critical factor in its use for fuel lines. Heating plastic at low temperatures can result in the release of potentially hazardous and flammable gases, including methane, ethylene, acetylene, and long-chain hydrocarbons. Lowering the melting temperature of plastic can also lead to unstable components, as the characteristics of the material may be impaired. However, melting recycled plastic at lower temperatures can have environmental benefits, reducing gas emissions and energy consumption.
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Frequently asked questions
8AN refers to the diameter of the fuel line.
A fuel line is a hose that carries fuel from the tank to the engine.
A fuel system plumbing kit includes a fuel line, fittings, and other components needed to install a fuel system.
The -8AN fuel line has a larger diameter than the -6AN fuel line.
-8AN fuel lines are available from a variety of retailers, including Summit Racing and Amazon.
