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Carburetor fuel connector

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BigBrother-84

Carburetor fuel connector

Hi Gentlemen!

This summer I changed the old malfunctioning carburetor for a new one.
Holly for the two.

Very satisfied, but one thing makes me not fully satisfied.

I just cannot figure out the way to connect the fuel pipe accordingly to, well, let's say my standards.
I have to use a rubber hose... I would like a rigid (bolted pipe) connexion, as the old one was.

There is probably a fitting to buy, to replace the fuel arrival one on the new carb, I just cannot find which one.

Here are the old and new carbs:

And their fuel inlet design:

If it matters to find a solution, their model:

Thanks in advance!

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

85lebaront2

Re: Carburetor fuel connector

Administrator

As the former owner of a Holley warehouse, there are two styles of fittings for those bowls, the banjo fitting in it and a small screw in style that takes a 5/16" inverted flare (like the old float bowl took). Look here, find the one you need and then look on Summit, Jegs or similar.
https://www.holley.com/products/fuel_systems/carburetor_components/fittings_fuel_lines_and_gauges/fittings/

Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

Snowpony

Re: Carburetor fuel connector

I believe#26-43 is the part you're looking for.
Almost certain it is the 9/16" thread
Curt

Snowpony

Re: Carburetor fuel connector

Problem may be the large radius the 3/8" tube will require.
There may be an issue with an air cleaner with a drop base as well.
Guess all I'm saying is9/16" x24 should be the carburetors internal thread
Curt again

BigBrother-84

Re: Carburetor fuel connector

Thanks Bill and Curt for you help,
Bill, I have to admit I am completely lost is the Holly fittings world.

I will first confirm the threads I need. I'll comme back with the precision. But for the pipe itself, this is not a real issue since I could completely change it and use the required end bolt fitting.

The carburetor bowl side replacement fitting is a more restrictive question...

Curt, you say

Snowpony wrote

Problem may be the large radius the 3/8" tube will require.

So I understand there is no 90° fitting to do the job, the pipe will have to turn to plug into the carb?

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

JimJam300

Re: Carburetor fuel connector

I looked around the web a bit yesterday, I was able to find some street elbows in various different materials with an SAE thread type on places like McMaster-Carr and other plumbing/HVAC supply stores. I also saw Summit carries a bunch of different pieces, but some don't list the full specs. When you get the size and pitch of that threaded connection let's see what we can find.

1982 Bronco restomod in progress: Built 4.9L, T19 4spd, 9" 3.00 rear w/ Eaton TrueTrac, 31" tires, fuel injection soon
https://www.youtube.com/@jimjamauto

ArdWrknTrk

Re: Carburetor fuel connector

Administrator

9/16-24 M x 1/2-20 (5/16 inverted flare) F street elbow....

That's going to be an interesting one to find, and you better have an assortment of seal washers to get the clocking right.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

85lebaront2

Re: Carburetor fuel connector

Administrator

In reply to this post by JimJam300

I think before I McGyvered something, I would see what the size on the tube on the banjo fitting is. If it is 5/16, then get a compression union, male to male in 5/16", cut the bubble off the end of the banjo fitting and make a nice solid joint. Brace the line from the pump so it won't vibrate.

Bill AKA "LOBO" Profile

BigBrother-84

Re: Carburetor fuel connector

85lebaront2 wrote

I think before I McGyvered something [...]

LOL!!!

Don't worry, I'll not try any Frankenstein operation on my new carb without consulting my pro friends.

For the moment, was busy on my radiator swap, I'll come back with my carburetor connector issue.

Thanks guys for your knowledge and help!

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

BigBrother-84

Re: Carburetor fuel connector

In reply to this post by 85lebaront2

85lebaront2 wrote

[...] I would see what the size on the tube on the banjo fitting is.

Bill, your idea about a simple banjo swap strategy would be very simple. Something like this, with the good diameter and threads would be so easy!

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

ArdWrknTrk

Re: Carburetor fuel connector

Administrator

This post was updated on .

Brake banjos are usually 10mm/ 3/8" ID.

You're looking for something 9/16 ID and 1/2- 20 x 5/16 inverted flare.

Check out this one:. https://www.autotoolworld.com/SUR-and-R-PS2305-M14-Banjo-12-X-20-Thread-_p_227407.html?gclid=CjwKCAjw5P2aBhAlEiwAAdY7dCn74QGK0fysnX1J6rjd8HWvpifOC3YiB7WOWzBn-R11axaGLDzj4hoC3XoQAvD_BwE

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

BigBrother-84

Re: Carburetor fuel connector

Ok guys, here is my plan.

In my basket, ready to order:

Adapter, AN to Inverted Flare, Straight (-6 AN to 1/2-20 in. Inverted Flare)

Coupler, Straight, Swivel (-6 AN Female AN to -6 AN Female AN)

9/16 in. Banjo (-6 AN Male Threads)

Any comments before I order?

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

Rusty_S85

Re: Carburetor fuel connector

BigBrother-84 wrote

Ok guys, here is my plan.

In my basket, ready to order:

Adapter, AN to Inverted Flare, Straight (-6 AN to 1/2-20 in. Inverted Flare)

Coupler, Straight, Swivel (-6 AN Female AN to -6 AN Female AN)

9/16 in. Banjo (-6 AN Male Threads)

Any comments before I order?

I take it you dont have the ability to do an -AN flare on the hardline right?

If you do I would recommend that, you would just need a -6 tube nut and tube nut sleeve (fits 3/8" line) and flare it to -6 AN then it will fit the banjo fitting.

"Old Blue" - '56 Fairlane Town Sedan - 292-4V, Ford-O-Matic transmission, 3.22:1
'63 Belair 2dr sdn - 283-4V, Powerglide transmission, 4.56:1
'78 Cougar XR7 - 351-2V, FMX transmission, 2.75:1 9inch
"Bruno" - '82 F150 Flareside - 302-2V, C6 transmission, 2.75:1 9inch, 31x10.50-15 BFG KO2

BigBrother-84

Re: Carburetor fuel connector

This post was updated on .

You got it, I am not equipped for tubing fitting/modification. And here, not easy to find specific threads tubes.

That's why I need an easy "plug and play" solution.

I am wondering about the banjo size, cannot find clear carburetor specs for that part on the web.
Is 9/16" ID the right diameter for my new Holley Carb?

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

BigBrother-84

Re: Carburetor fuel connector

For those interested, I took off the existing banjo, 9/16" ID confirmed.

So, my plan sounds good.
I ordered the 3 fittings.

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

BigBrother-84

Re: Carburetor fuel connector

Final step done.

Recap:

1- The new Holley Carb comes with a banjo, for rubber hose fitting. But original one was Female 1/2"-20 Inverted Fare ended, to screw with the rigid fuel pipe:

2- The easy solution (not satisfied about it):

3- The fittings solution [1/2-20 Inverted Flare F to -6AN Male] + [straight coupling -6AN F to -6 AN F] + [9/16 Banjo -6AN Male]:

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

Gary Lewis

Re: Carburetor fuel connector

Administrator

Ta Da! It worked!

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI