Fuel line for EFI application and E10.
Most of the available aftermarket flexible fuel line worries me, the description is "resistant to alcohol". This means they slowly deteriorate and would require frequent replacement. The two choices that appear to solve the problem are Teflon coated lines and plastic lines as used by GM and others. Teflon coated lines should last the life of the care but are very expensive. Plastic lines seem to last as long as they are not abused.
I made a line to connect from the firewall to the engine using Dorman nylon hose, Taylor heat protective sleeving and quick disconnect fittings. There is a Dorman tool that will press the connectors on the line but it runs about $100 and is expensive for something with limited use. Some people have rigged a caulk gun to press the fittings on. I have a method that works well. I use a 10 ton press to make quick work on the job.
This is the materials used. Dorman plastic fuel line, Taylor heat resistant sleeving and the fittings. I also used a couple of short pieces of heat shrink to clean up the look.
This is my setup for pressing the connector ends on. I used the fuel line clamps out of my MasterCool Hydraulic set to hold the line, but a cheap $10 harbor freight flaring tool could be used to hold the line. In my case I used vise grips to hold the clamp on the line. Here the hose and connector are aligned and ready to be pressed on.
When pressing the connector on the barbed end will want to push the hose sideways you can easily guide it with one hand and work the press lever with the other.
This shot shows the hose starting to slide over the barbs.
The final result
At this point I cut a piece of the Taylor sleeving to length. The Taylor sleeving will also protect the nylon fuel line from abrasion.
The competed end with a piece of heat shrink over the Taylor sleeving and barbed end of the quick disconnect.
Now repeat doing the other end. Be sure to slide a piece of heat shrink over the line before pressing the other connector on.