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      03-30-2020, 09:18 AM   #1
///Monika
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LPFP to HPFP Fuel Line

Before attempting to do this, I was wondering if anyone had any 'best practices' on running a 3/8" line (fuel-it). Ran a scope to look for any obstructions and it looks like very little room for anything. I see that there are two lines mounted/clipped into place which is an obstruction in of itself. Seems it might be best to start at the access point in the cabin as it would be pretty difficult to run it from underneath and make that 90. The plan is to leave the OEM fuel line intact in the event we want to return everything back to stock.

So far the LPFP (EOS BPM4 a well) has been installed and we're in the process of completing the HPFP (waiting on 1 part). The ethanol sensor is mounted and lines are running up to that point. Just need the to-tank line planned out.

Thoughts?

-- For reference, the following is being installed for e85.
Dorch Engineering S2 HPFP -- Fuel-It LPFP short line -- Fuel-It Ethanol Sensor -- [Fuel-Labs filter] -- Fuel-It LPFP long line -- Fuel-It Stage 2 (Walbro 525)

Last edited by ///Monika; 04-01-2020 at 01:34 PM..
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      04-01-2020, 01:26 PM   #2
///Monika
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A quick update. We were finally able to route the line. The fitment is pretty tight from the LPFP to it's exit point which is the OEM fuel and vent line. The lines are Fuel-It (Aeroquip) -6. Once the line is in place, it's best to pull the line back and forth to verify it's not binding anywhere.

A bit of a guide for others. First and foremost, protect the fuel line from any contaminants. We did so by placing yellow tape over and around the exposed end. The yellow really assists in locating the line from underneath the vehicle. Now, starting at the LPFP, just right of the OEM fuel line (blue), slowly work the line for about 2 feet. If your unsure of distance then lay the line longwise on the seat area and put a piece of tape on it. Keep in mind that you will not be running the line this entire distance, it's merely a guide. If you hit an obstruction then inch back and rotate the line and keep moving forward.

Now go underneath the vehicle. Locate the area where 4 lines ([L]black,black,white and blue[R]) are running 90 degrees just behind the fuel tank (drivers side). We used an LED endoscope and located the line (yellow tape). This can probably be done using a really bright LED but the area is pretty tight. You absolutely want to get that line on the right side of the OEM fuel line (blue; when facing the front of the vehicle). Take a coat hanger and cut it to the appropriate length. Put a 90 on the end and use a heat shrink tube over it (so it's on there tight) so it can grip the line. Now here's where you have to be patient. It helps to have two people. One that can pull the line back and forward as needed. Be very careful not to damage the OEM lines as you may want to put it back to stock one day. Just take your time. Once you have the line pulled, you're good to go. Just make sure that you pull the exact length you need and verify the line can move back and forth. It won't move with ease but you're verifying the line isn't binding or pinched anywhere.

Attaching a photo for reference. The mounts are sold by Summit Racing made by a company called NotchHead. You'll need NotcHead part# 2616-6 for -6 fuel line (cost was $18). We used a 1/4 drill bit, 4mm rivnuts (zinc plated carbon steel) and attached using M4 - 20mm (length) 304 stainless button head fasteners.

We'll take more photos once we receive the fuel filter (Fuel Labs, thanks to F87source for the recommendation) and Aeroquip -6 an push fittings. I hope this helps someone else who's doing this.
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      04-01-2020, 01:41 PM   #3
///Monika
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Another quick photo (endoscope) showing the amount of room you have to route the line from the LPFP.
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      04-01-2020, 09:26 PM   #4
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very nice!
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