Are fuel lines under pressure?
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.
What’s the minimum pressure for a fuel line?
If the minimum required fuel system pressure for our example is 6 PSI (not accounting for other losses), the graph shows us the maximum flow rate to be considered is 110 GPH. Taking this information into consideration, let’s examine how different fuel line sizes can affect pressure drop.
Can a compression fitting be used on a fuel line?
Compression fittings are fine for low pressure steel lines like fuel pump lines. This probably depends more on where you live and what you’re vehicle inspection entails. – Ben Oct 30 ’16 at 22:42 I’ve read it on various forums saying they’re not recommended on high pressure lines like fuel. Maybe they meant fuel lines that aren’t stock?
Which is more sensitive to fuel line size or pressure drop?
If we add 3 PSI in difference regarding pressure, the EFI pump flow rate performance may have dropped off less than 3%, yet the carbureted pump flow rate loss is much more dramatic at greater than 33%. Showing EFI systems are not nearly as sensitive to fuel line size as carbureted systems.
What happens if you drop the fuel line?
Excessive pressure drop in the fuel lines feeding a carburetor or EFI system will inhibit their proper function, and in the case of a bypass or return style regulator, excessive pressure drop through a return line will squelch the regulator’s ability to operate correctly.
What are the problems with fuel line hoses?
The hoses with the grey outside coating (UV protection) seem to have more problems than others. Attwood brand hoses seem to have more problems than some others. They had at least one recall of hoses due to delamination of the inner liner causing blockages. OEM hoses seem to last longer before showing problems.
Can a flexible fuel line replace a hard line?
Do not replace long runs of hard line with flexible fuel hose. Even the best fuel injection, low-permeation fuel line will have some amount of fuel vapor loss. Also, road debris can damage the line.
Can a low permeation fuel line be dangerous?
Even the best fuel injection, low-permeation fuel line will have some amount of fuel vapor loss. Also, road debris can damage the line. This is very dangerous, and it also can be difficult to seal the connection between the metal line and the hose that could be under 50 psi or more of pressure.
What causes fuel line blockages on a boat?
That liner can delaminate from the outer hose and cause blockages. The hoses with the grey outside coating (UV protection) seem to have more problems than others. Attwood brand hoses seem to have more problems than some others. They had at least one recall of hoses due to delamination of the inner liner causing blockages.