Sylvie Willis
When it comes to fuel lines, there are a variety of options available for those looking to modify their cars. One common question is what size fuel line is needed from the tank to the rail. Some sources suggest that a 6 AN SS fuel line is a good option, and that the STM kit provides a convenient solution. This kit includes 10 feet of SS line, two bulkheads, and the necessary fittings. However, some car owners prefer to piece together their own materials, as it can sometimes be more cost-effective. It's important to note that the size of the fuel line can impact fuel pressure, and that the term used to describe the size of the hose is diameter, not thickness.
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What You'll Learn
- The STM kit is a popular choice for a fuel line from tank to rail
- The standard size for a fuel line from the fuel rail to the AFPR is -6 AN
- You can save money by piecing together materials instead of buying a kit
- The length of the fuel line depends on the car and the location of the fuel filter
- The brand and size of the fittings must match the fuel line to prevent leaks
The STM kit is a popular choice for a fuel line from tank to rail
One of the key advantages of the STM kit is its compatibility. The -6AN fittings seamlessly work with the factory sending unit and fuel rail, ensuring a straightforward installation process. Additionally, the kit is 100% E85 safe, making it suitable for use with various fuel types.
In terms of quality, the STM kit excels with its high-quality components. It utilizes a Weldon fuel filter with a stainless steel element, ensuring reliable fuel filtration. The kit also includes Vibrant fittings and a black braided nylon line with screw-in STM fittings, providing a secure and durable connection between the fuel rail and sending unit.
The STM kit also offers versatility in its application. For instance, it can be used with the 2001-2006 Mitsubishi Lancer Evolution VII, VIII, and IX models, providing a high-quality E85 safe line and fittings. The kit includes a -6AN soft nylon braided line that won't scratch the paint, making it a preferred choice for those seeking a reliable and aesthetically pleasing solution.
Overall, the STM kit is a popular choice for a fuel line from tank to rail due to its compatibility, quality, and versatility. It provides a comprehensive solution for replacing old, rusty fuel lines and ensures a reliable and secure fuel system for a range of vehicle models.
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The standard size for a fuel line from the fuel rail to the AFPR is -6 AN
When ordering a fuel line, it is important to match the line to the fittings. The AN size of the fittings is measured by how many 1/16" the fitting diameter is. It is not recommended to match hose ends to different companies' hoses, as this may cause leaks. It is also important to consider the quality of the fittings, as some may conform to JIC standards but not meet the required AN specifications.
Some car owners have opted for stainless steel hoses in -8 AN size, while others have mentioned using PTFE or Teflon lines. It is worth noting that some fittings, such as Summit's, have been reported to corrode when fitted to a steel braided line.
When replacing the fuel line from the tank to the filter and pressure sensor, approximately 8 feet of hose was used. For the line from the tank to the rail, 14 feet of hose was mentioned as sufficient, with some extra length left over.
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You can save money by piecing together materials instead of buying a kit
If you're looking to save some money on your fuel line, you can definitely consider piecing together the materials yourself instead of buying a ready-made kit. This DIY approach can be more cost-effective and give you the satisfaction of personalizing your car. Here's a guide to help you through the process:
First, you need to determine the size and type of fittings you require. The fittings refer to the connectors at the end of the fuel line, and common types include AN, JIC, NPTF, and BSP. The AN size, for example, indicates the diameter of the fitting in increments of 1/16". It's crucial to match the line you order with the fittings you have to avoid leaks.
Next, you'll need to decide on the type of hose. The most common type is push-on hose, which is cost-effective and suitable for most production cars. However, it's not recommended for inside the car as it allows vapour and fumes to escape. If you're in the UK, be aware that any leak in the fuel system will cause your car to fail its annual MOT safety inspection. For inside the car, consider using R9 specification fuel hose, which is more expensive but will last longer and won't cause issues with fuel fumes.
Now, you can source the materials. One option is to find a shop that specializes in hydraulic or industrial lines, as they often have the tools and materials suitable for automotive applications. They can cut lines to your desired length and provide the necessary connectors. You can also order custom-made lines from companies like Classic Tube, providing them with your existing lines as a template or sending them your specifications.
Finally, it's time to assemble the fuel line. This process involves bending and flaring the tubes. Tube bending and flaring tools are readily available from suppliers like Harbor Freight Tools and The Eastwood Company, with prices varying based on quality. When working with stainless steel tubing, consider using a hacksaw instead of a tubing cutter to avoid work-hardening the material. Additionally, use a lubricant compatible with the medium your lines will carry to make the flaring process smoother.
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The length of the fuel line depends on the car and the location of the fuel filter
The length of the fuel line required for your car depends on the make and model of your car and the location of the fuel filter. The fuel filter is typically located along the fuel line or near the fuel tank. In some cars, it is located in the engine bay on the line that leads to the fuel rail, while in others, it is placed in the fuel tank itself.
For example, one user with a Full Blown dual fuel pump hanger mentioned that they ordered 12 feet of fuel line to be safe from the tank to the filter and an additional 14 inches from the FPR to the tank. They also mentioned that they already had a filter to rail, so if someone else didn't, they would need that extra 14 inches. Another user with a 98GST Sera mentioned that they ordered 14 feet for the tank-to-rail line and had some extra, which they preferred to avoid paying shipping again.
It's important to note that the location of the fuel filter can vary depending on the vehicle, so it's recommended to refer to the vehicle's service manual or consult a professional to determine the exact length of the fuel line required. Additionally, when replacing the fuel filter, it is crucial to relieve the pressure in the fuel system by removing the fuel pump fuse or relay and running the engine until it stalls. This will help prevent fuel spray during the replacement process.
The fuel filter is an essential component of the fuel system, capturing dirt and debris to prevent clogging and ensuring optimal fuel flow to the engine. Regular maintenance, such as replacing the fuel filter every two years or 24,000 miles, is necessary to maintain the performance and longevity of the fuel pump and engine.
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The brand and size of the fittings must match the fuel line to prevent leaks
When it comes to fuel lines, ensuring that the brand and size of the fittings match the fuel line is crucial to prevent leaks and maintain the integrity of the system. Mismatched lines and fittings can lead to unsafe conditions and poor performance.
In the context of DSM vehicles, owners often discuss the importance of matching fuel line fittings to avoid leaks. For instance, some recommend using Russell ProClassic -8AN feed and -6AN return lines with a Bosch 044 fuel pump. The specific brand and size of fittings can vary, but the critical aspect is ensuring compatibility to prevent leaks.
The type of thread used in the fittings is also essential. The most common type is the National Pipe Thread Taper (NPT), which is a tapered thread design that creates a tight seal when matched with a female fitting. This type of thread is prevalent in North American plumbing connections and fuel line components. However, it's important to identify the specific thread type in your components and match it with the corresponding thread type in the fittings.
To ensure a secure connection and prevent leaks, it's recommended to use sealants or gaskets. Pipe thread compounds, anaerobic sealants, and Teflon tape are commonly used to fill gaps and create a tight seal. Additionally, O-ring seals offer greater sealing ability and are preferred in high-performance fuel systems. It's crucial to clean the threads and apply the sealant properly to avoid leaks.
After assembling the fuel line and fittings, it is imperative to test the system for leaks. This can be done by connecting the fuel line, turning on the fuel pump, and inspecting the connections for any signs of leaks, such as drips or bubbles. If a leak is detected, troubleshooting steps can be taken, such as tightening the fittings, checking the sealant, or replacing faulty fittings.
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