Pump to Carb Fuel Line Setup

[NJBronk]

I want to get rid of the rubber fuel line in the engine compartment. A PO cut the steel tubing about half-way, leaving a vertical post, then connected a rubber line with a Fram plastic fuel filter in the middle then on to the Holley Carb.

I considered going back to stock replacement steel but didn't want even the short rubber hose section, so I am thinking:

This connection from the existing steel line: https://www.amazon.com/dp/B098NNRVPZ/?tag=classicbroncos-20
This PTFE hose kit: https://www.amazon.com/dp/B07JFPXHB2/?tag=classicbroncos-20
This replacement for the banjo inlet on the Holley: https://www.holley.com/products/plu...fuel_injection_adapters/banjo/parts/977666ERL

So it would be all 5/16" line and 6AN fittings.

Should I install an in-line filter as well? I don't have anything but (presumably) the sock on the pickup in the tank and the Fram in-line in the engine compartment...

 

[DirtDonk]

I want to get rid of the rubber fuel line in the engine compartment. A PO cut the steel tubing about half-way, leaving a vertical post, then connected a rubber line with a Fram plastic fuel filter in the middle then on to the Holley Carb.

Pretty common change for several reasons.
Some just didn't like the crappy bends in the original. Some few wanted to get rid of the return manifold found on some '73 model Broncos. Some wanted to add a filter. And some needed to because of changing the carburetor.
Sounds like yours was for the carb change.

I considered going back to stock replacement steel but didn't want even the short rubber hose section

Stock replacement would be 5/16" anyway, so too small for the Holley unless they make adapters now?
Any reason you don't want even one bit of rubber? I know some of the modern stuff is crap, but if you get good stuff it should last many years.
That said, I'm a fan of metal line and bending my own.

, so I am thinking:

This connection from the existing steel line: https://www.amazon.com/dp/B098NNRVPZ/?tag=classicbroncos-20
This PTFE hose kit: https://www.amazon.com/dp/B07JFPXHB2/?tag=classicbroncos-20
This replacement for the banjo inlet on the Holley: https://www.holley.com/products/plu...fuel_injection_adapters/banjo/parts/977666ERL

So it would be all 5/16" line and 6AN fittings.

That looks like pretty nice stuff. Would look great under the hood there.
I wonder how long the braid will stay happy? As long as it's not laying up against something, it should last I would think.
But is the hose, at .315/5/16 inch still compressible enough for the fittings? Funny they still call it "-6" though, since dash-six means literally 3/8 inch.
Maybe it's a reference to the outside dimension somehow? Doubt it, but it does seem strange.
But if it all plays nice together, should be great. Guess that's the best way to go for going 5/16 to 3/8 back and forth.

And the inside liner should last longer than rubber in theory at least.

Should I install an in-line filter as well? I don't have anything but (presumably) the sock on the pickup in the tank and the Fram in-line in the engine compartment...

I always did. And with just a few extra fittings, you should be able to easily fit a filter between the pump and carb.
Do you have stock tanks? The sock is a decent enough pre-filter, but is it still intact? Have you been inside the tank and checked it? Or has it been replaced?

I'm sure others will have their recommendations and comments. Lots of fuel systems have been experimented with and replaced over the years by members here. Should be a fun discussion!

Good luck.

paul

 

[Lawndart]

A little opposite sidetrack ---
I am running a Holley 4bbl and cut the steel line, then rubber to a filter, rubber to the carb. Every now and then I would get some seepage where the rubber slipped over the steel line. I wanted to "bead" the steel line at the cut, but I do not have the tooling for that.
So this past winter, I was going to do a line like you mention (similar to aircraft line). Then I started thinking - "what will happen if I am far from home and something goes wrong with that line? I would be hosed...

So, I decided to basically go rubber from the pump to the carb. I did a lot of searching and even ordered a couple fittings that just did not work well. Then I found this -
Holley p/n: 26-44

Proper connection to the fuel pump and I can run rubber from the pump to the carb and routed like I need. Working great. Also easy to get rubber almost anywhere if there was ever a problem.

 

[ntsqd]

When you do use rubber hose buy the "Emissions Barrier" type. Preferably from a name mfg like Gates. It is expensive, but it lasts.

 

[SteveL]

Just go with regular rubber line or gates like mentioned. I had stainless braided line on mine. The bronco started running bad like lack of fuel. Ended up the line rotted inside the braided outer sleeve. If you squeezed the line it gushed gas all over the intake. Looked fine on the outside. Since then I just run the standard rubber line

 

[NJBronk]

Ok, maybe I'll keep the rubber and just make sure I check in on it regularly.

Thanks, all!

 

[FordFarmer]

Regarding the in line filter, I have two. One screws into the carb, the other is a cheap plastic type that’s mounted before the fuel pump. When I daily drove it for a coupe years I ran fuel with ethanol. It must have been stripping 40 years of funk out of the tank because every time I changed the oil that little filter was full of black gunk. Now that it’s a weekend cruiser and I run exclusively non ethanol fuel that filter stays clean. Years ago someone here had some pretty solid logic for not running the extra filter like I do, I just can’t recall what that logic was. But in my case I think it helped more than it hurt.