fuel lines Holley vs Promax

[mr340]

has anyone tried Holley/Earl's new six pack fuel lines? Not sure I like the carb fitting, I think being able to disconnect at the carb without removing the carb fitting would be better.
Opinions?
https://www.holley.com/blog/post/revamp_your_old_six_pack_setup_/

 

[steve340]

You are right I do not think I would buy that setup.
I cannot see how it would "swivel" at the carburettor fitting?????
I am like you the fewer times you screw in and out of the float bowl muck metal the better.

 

[biomedtechguy]

The Promax lines make it much easier to work on the carbs and intake. MUCH easier. I had to try a couple of different fitting to fuel bowl gaskets before I got a good seal, and I should have flushed the SS braided lines out before I installed them because I wound up with braid clippings in my center carb Promax metering block.
Even with the problems, both easily rectified, I definitely love the braided lines!
I would jump on the Holley brand as the gaskets that seal the fitting at the fuel bowl look like they would seal on the first try. I may get some of those gaskets from Holley.
I also got the SS braided lower line from the mechanical fuel pump, and that includes a 40 micron reused filter and pressure gauge.

 

[biomedtechguy]

You are right I do not think I would buy that setup.
I cannot see how it would "swivel" at the carburettor fitting?????
I am like you the fewer times you screw in and out of the float bowl muck metal the better.

The Holley or Promax setup allows multiple points to disassemble the fuel lines that means you don't have to take the fuel bowl fitting in and out.

 

[Mr Belvedere]

You are right I do not think I would buy that setup.
I cannot see how it would "swivel" at the carburettor fitting?????
I am like you the fewer times you screw in and out of the float bowl muck metal the better.

If using these lines I would disconnect at the tee and leave the hose attached to the bowl. You ain't getting to those easily anyways.

 

[mr340]

for the Holley set-up the disassemble point on the center and rear carb is @ the "T" where as on the Promax you disconnect at all 3 carbs without removing the large bowl fitting, plus access to the mounting bolt on the rear carb may be restricted. maybe pics from a diff angle would show otherwise. Hoping someone has installed this set-up and can answer these Q's .

 

[biomedtechguy]

I just had to remove and replace my intake, and I did that at the inline fuel filter connector.
It's been too long for me to say what I disconnected to remove all 3 carbs.
I will say that I worked with the factory style fuel lines and fittings, or more accurately, they WORKED ME.
No comparison! Unless it has to look factory, the flexible AN fitting equipped lines are the way to go!

 

[mr340]

Unless it has to look factory, the flexible AN fitting equipped lines are the way to go

Agreed, Just trying to decide which one

 

[biomedtechguy]

Agreed, Just trying to decide which one

If you get the Promax, like I did, be SURE to flush the lines before you install them.
I don't know if it was the lower or upper line or both (I suspect lower) that had tiny steel braid clippings in it, but they wound up in the metering block.
It's bad because I thought to flush them, because I worry about, well, everything, but I had so much to do. Should someone have to flush new fuel lines? I wouldn't think so, but yes, I did, and should have.
I went the whole week of Cruisin the Coast with the freshly rebuilt and modified Holley 2bbl carbs running poorly, and it wasn't until after I took all 3 apart and found the braid clippings in the vertical fuel fittings (I can never remember what they're called) of the center carb metering block. Once I flushed all that out, it ran fine. Look at the vertical brass fittings, some are solid, some have a tiny hole, and the braid clippings were stuck in some of those. (I'm sure someone knows what they are called)

 

[RJRENTON]

If you get the Promax, like I did, be SURE to flush the lines before you install them.
I don't know if it was the lower or upper line or both (I suspect lower) that had tiny steel braid clippings in it, but they wound up in the metering block.
It's bad because I thought to flush them, because I worry about, well, everything, but I had so much to do. Should someone have to flush new fuel lines? I wouldn't think so, but yes, I did, and should have.
I went the whole week of Cruisin the Coast with the freshly rebuilt and modified Holley 2bbl carbs running poorly, and it wasn't until after I took all 3 apart and found the braid clippings in the vertical fuel fittings (I can never remember what they're called) of the center carb metering block. Once I flushed all that out, it ran fine. Look at the vertical brass fittings, some are solid, some have a tiny hole, and the braid clippings were stuck in some of those. (I'm sure someone knows what they are called)
View attachment 961179

I believe the vertical channels you mentioned are referred to as primary well emulsion channels, where the liquid fuel is mixed with a controlled amount of air.
BOB RENTON

 

[biomedtechguy]

I believe the vertical channels you mentioned are referred to as primary well emulsion channels, where the liquid fuel is mixed with a controlled amount of air.

Well, thanks. What I am absolutely sure of is that when you add in shards of stainless steel braid clippings sticking out through the fittings that do have holes, it impedes the flow of fuel, and makes the engine run poorly...

 

[Moparsr2fast]

Hey guys,
in the middle of assembling the Promax lines on my 440 6. I am using a Firecore rtr dizzy. Seems the advance can will interfere with the fuel line. Anyone else have this issue, and if so, what did you do?

 

[biomedtechguy]

 

[Moparsr2fast]

Sometimes the answer is staring you in the face.... Thankyou sir

 

[biomedtechguy]

Hey guys,
in the middle of assembling the Promax lines on my 440 6. I am using a Firecore rtr dizzy. Seems the advance can will interfere with the fuel line. Anyone else have this issue, and if so, what did you do?

Sometimes the answer is staring you in the face.... Thankyou sir

I'm going to have to do something different because the shop is in the process of doing a lot of work on my Roadrunner, and a big part of that is the Wraptor serpentine belt and accessory system. That fuel line will have to be addressed in some manner. I'm also going to tie my vapor separator back in, right now it's blocked off.
Post some pictures when you are finished please.