What style fuel line is best?

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doogievlg

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What is everyone running for their fuel? Braided, steel, some sort of other flex line?
I’m about to run my fuel lines and bought some Russel push lock line but apparently that isn’t NHRA approved so I’m back to square one.
 
Follow the factory. Hard line except where soft line connections are needed.
Stainless if heat and rust are a concern
3/8 if it makes you sleep better.
Make sure the filter outlet is higher than the inlet - just like the factory.
Final stretch to the carb depends on the carb.
Braided stainless with real AN fittings are generlaly trouble free and will let you take the bowls off a holley a little easier when messing with the jetting or blocks.
A fuel log is nice if using a return line and pressure reg on the return.
I prefer steel hard line for the Holleys with a hose between the front and rear bowls.
But quality on most off the shelf is so-so.
If you're racing, look in the inlet and see if the connection is restricted. If so open it up.
The aluminum versions look nice but some (many?) have braided held with hose clamps.
Aluminum transfer s heat into the fuel quicker and if using hose clamps, might as well just make your feed line own out of a cheap steel one.

PS. insulated firesleeve and reflective fibre glass sleeves and wrapping over all my fuel lines in the engine compartment. And where the headers are super tight tight, zircotec's foil is the first line of defence. (it won't melt or burn if it touches the header.)
 
I run steel lines, easy to find leaks and cheap. Pretty sure NHRA only allows 6 inches of rubber hose for the entire system
Edit: 12 inches
 
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I run Braided stainless Steel line with AN fittings for long runs that i know i won't be playing with again for a long time
EX: fuel tank to pressure regulator

Because braided stainless can fray, and tears your fingers up, i run a black nylon braided line with AN fittings for places i may alter at some point, or want or disconnect for cleaning.
EX: pressure regulator to carb bowls.
 
The current NHRA rulebook allows for a maximum of twelve inches of rubber hose in the fuel system. Approved braided steel lines or hard lines are required. I run stainless hard lines with AN fittings as suggested above. You are allowed one cool-can as well.
 
I really like the Earls Ultra Pro hose and fittings. Very flexible, easy to assemble, available from summit the next day. Here's how I plumbed my '70 Dart. I have an Aeromotive Stealth 340 fuel cell, with the pump inside. I'm sure I've made plenty of mistakes, and it might be wrong, but this was my first time, and it works. I will change what needs to be changed if I have to though. Feed and return are 1/2", I probably should have gone a size bigger for the return.

I have since switched the hard lines from the fuel cell in the trunk to the soft braided lines, I was just experimenting with the hardline.

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I really like the Earls Ultra Pro hose and fittings. Very flexible, easy to assemble, available from summit the next day. Here's how I plumbed my '70 Dart. I have an Aeromotive Stealth 340 fuel cell, with the pump inside. I'm sure I've made plenty of mistakes, and it might be wrong, but this was my first time, and it works. I will change what needs to be changed if I have to though. Feed and return are 1/2", I probably should have gone a size bigger for the return.

I have since switched the hard lines from the fuel cell in the trunk to the soft braided lines, I was just experimenting with the hardline.

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I stopped at a hose shop today and this is what they tried to sell. Was it easy to cut and get the fittings on?
 
yes, very easy. wrap tightly with Teflon plumbers tape. then cut with a new razor blade, slide the braided sheathing back, thread the ferrule onto the hose, and then slide the sheathing up, remove the Teflon tape and insert the fitting and tighten. just like the directions say, it is easy. earls has a video.

Earls 620106ERL Earls UltraPro Hose End
 
For MoparDude 318, where your fuel and return lines pass through the front torsion bar frame, what did you use ?
 
I really like the Earls Ultra Pro hose and fittings. Very flexible, easy to assemble, available from summit the next day. Here's how I plumbed my '70 Dart. I have an Aeromotive Stealth 340 fuel cell, with the pump inside. I'm sure I've made plenty of mistakes, and it might be wrong, but this was my first time, and it works. I will change what needs to be changed if I have to though. Feed and return are 1/2", I probably should have gone a size bigger for the return.

I have since switched the hard lines from the fuel cell in the trunk to the soft braided lines, I was just experimenting with the hardline.

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Maybe it's because I'm on my phone, but I am so lost, looking at your set up
Are you running your fuel into the filter, then the log, then the regulator and the "out" port from there back to the tank?
 
Ran as much steel hard line as I could then PTFE braided anywhere there is need for flexing.
 
I really like the Earls Ultra Pro hose and fittings. Very flexible, easy to assemble, available from summit the next day. Here's how I plumbed my '70 Dart. I have an Aeromotive Stealth 340 fuel cell, with the pump inside. I'm sure I've made plenty of mistakes, and it might be wrong, but this was my first time, and it works. I will change what needs to be changed if I have to though. Feed and return are 1/2", I probably should have gone a size bigger for the return.

I have since switched the hard lines from the fuel cell in the trunk to the soft braided lines, I was just experimenting with the hardline.

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nice ! You built a nice fuel system, fuel starvation will not be an issue.
I used 1/2" in my system, took the advice from an old timer. He said spends your money once and build it right.
You need 1/2 to feed over 600 hp in the 1/4.
 
Maybe it's because I'm on my phone, but I am so lost, looking at your set up
Are you running your fuel into the filter, then the log, then the regulator and the "out" port from there back to the tank?

yes sir, precisely. From the research I have done, that is a way to get a constant flow of cool fuel from the tank straight to the carb. The vapor lock issue I was having before is nonexistent. The carburetor return style regulator is plumbed on the return line because it acts as a return restrictor. I remember talking about doing it this way with a few other members.
 
Very interesting
Almost looks to me, like you would have max psi going into the carb, and regulated psi back into the tank
(Obviously it works, but I dont see how)
Have you had a fuel pressure gauge on it, and verified it reacts to changes on the regulator?
 
nice ! You built a nice fuel system, fuel starvation will not be an issue.
I used 1/2" in my system, took the advice from an old timer. He said spends your money once and build it right.
You need 1/2 to feed over 600 hp in the 1/4.
Thank you. The fuel system works pretty good as far as I can tell. Having this 1" thick wood spacer REALLY keeps the carb cool to the touch. I'm a believer.

AED Birchwood Carburetor Spacers 6170

Very interesting
Almost looks to me, like you would have max psi going into the carb, and regulated psi back into the tank
(Obviously it works, but I dont see how)
Have you had a fuel pressure gauge on it, and verified it reacts to changes on the regulator?

At first that's what I thought. But it works and I don't know how. lol. Someone on here explained it to me, I'll search for the thread and get an answer. I have a gauge mounted on the fuel log, its not in those pictures. The way I have it, it works when I adjust the regulator for any given pressure. :)
 
Thank you. The fuel system works pretty good as far as I can tell. Having this 1" thick wood spacer REALLY keeps the carb cool to the touch. I'm a believer.

AED Birchwood Carburetor Spacers 6170



At first that's what I thought. But it works and I don't know how. lol. Someone on here explained it to me, I'll search for the thread and get an answer. I have a gauge mounted on the fuel log, its not in those pictures. The way I have it, it works when I adjust the regulator for any given pressure. :)
Your making me feel like Joe dirts dad "how does the positrack rear end in a Plymouth work? It just does"

Guess this is one of those things I just cant understand, but I'm excited to hear it works
 
plain old roll-yur-own 3/8 steel. 400hp streeter. I put a big EFI filter at the right rear corner with screw-on fittings. Then one piece to the pump. Then one-piece to the dual feed for the 750DP.
I have a short jumper at the back by the 3/8 sender/pick-up. another at the pump to supply, and a third shortie at the dual-feed, just to make it quicker to remove the carb. That EFI filter has over 125,000 miles on it........ one of these days I guess I should probably look at it,lol.
 
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