Inspired by martymil’s post I decided to pull my HPFP filter, drill my fuel rail, add an inline filter and upgrade the line from the tank to the HPFP hard line. There are some gains by going straight to the HPFP but people are using a 1/8 npt adapter and the LPFP seals with an o-ring. Everyone says it works, but I decided to just leave the stock hard line. I was not a huge fan of pushloc hose so I looked into PTFE hose. It is much better suited for ethanol. The downside is that generally it is less flexible when compared to rubber hose. It was a tight fit especially for the fuel filter but overall turned out well. I chose to go with Racetronix hose and fittings because they offer quick connect PTFE hose ends. It makes for a clean install. This is a great option if you are just looking to upgrade the line from the tank to the HPFP or are looking to upgrade the line and add an ethanol sensor. Obviously the inline filter is optional when pulling the HPFP filter but I figure it is extra insurance. I do not have results yet due to breaking in a new clutch but will post up logs when I can. Based on martmils and others results it should help a bit on the high pressure side.
Parts list if adding an inline filter (If using an ethanol sensor you will need 2 additional $10 fittings) 7 feet will most likely work but 8 is a safer bet.
Fuel filter element- This was the smallest micron filter I was able to find that was rated for ethanol.
Parts list if just upgrading the line and adding an ethanol sensor- (remove the 2 6an-3/8 quick connect if just looking to upgrade the line)
Drilled fuel rail (11/64 or 3/16 drill bit) Before/After
HPFP filter removed
Mounting the fuel filter (note: this is on a manual trans car. The clutch line had to be slightly bent) Dimensions just to give a rough idea and your results may be different.
Upper line from filter to hard line (90 6an end to 6an 5/16 female quick connect). You will want to remove the intake manifold for easier access to the quick disconnect on the hard line.
Modified stock clips- I use a Dremel to modify the stock clips so the new line clips into place. The two rear clips have a larger spot that is not used so the rear two do not need to be modified.
This stock bracket needs to be bent to give a little extra clearance for the new fuel line. It can easily be bent back to stock
Rear hose/house routing. It runs pretty much in the location of the stock line and does not rub anywhere. It is a tight fit routing it up to the tank. It helps to remove the drive side tank strap bolt for more clearance. I did not measure the exact length on this hose as your results will vary depending on filter mounting.
Parts list if adding an inline filter (If using an ethanol sensor you will need 2 additional $10 fittings) 7 feet will most likely work but 8 is a safer bet.
Fuel filter element- This was the smallest micron filter I was able to find that was rated for ethanol.
Parts list if just upgrading the line and adding an ethanol sensor- (remove the 2 6an-3/8 quick connect if just looking to upgrade the line)
Drilled fuel rail (11/64 or 3/16 drill bit) Before/After
HPFP filter removed
Mounting the fuel filter (note: this is on a manual trans car. The clutch line had to be slightly bent) Dimensions just to give a rough idea and your results may be different.
Upper line from filter to hard line (90 6an end to 6an 5/16 female quick connect). You will want to remove the intake manifold for easier access to the quick disconnect on the hard line.
Modified stock clips- I use a Dremel to modify the stock clips so the new line clips into place. The two rear clips have a larger spot that is not used so the rear two do not need to be modified.
This stock bracket needs to be bent to give a little extra clearance for the new fuel line. It can easily be bent back to stock
Rear hose/house routing. It runs pretty much in the location of the stock line and does not rub anywhere. It is a tight fit routing it up to the tank. It helps to remove the drive side tank strap bolt for more clearance. I did not measure the exact length on this hose as your results will vary depending on filter mounting.