Hello guys, first time post and glad to be here. Posting for my 88yr old dad who has always been a 32 ford roadster fan. Im trying to help him replace a 48" fuel hose that is braided and has straight female AN type fittings on either end.One end attaches to fuel gauge from hardline from tank, other routes up behind alt bracket to inlet to fuel filter. My question is two fold..where can I buy a pre-made line just like it or one that will work? My main question is what size is this fitting? By the info I have found on web, 1/2" OD would be dash eight. However, Im not that sure. I went on Summit racing, and I can find hose made for nitrous (blue fittings not red for gas), and not sure it will work or not. Any help appreciated. This is a rod he bought custom built. Small block chevy 5.7l I believe.
It would help a whole bunch when posting a question like this is that you inform the viewing audience the city and state where you live. By the looks its a -6 line, very common for fuel supply
If the threads measure 9/16” OD with 18 threads per inch you have a -6 line, -8 would be 3/4”-16 thread. Try a hydraulic hose/fitting supplier or maybe an industrial supply house. Most hydraulic shops will make up a hose while you wait.
Try this. Given the fact that a minor mistake on a fuel line can have catastropic results and the the age of your dad, I would contact one of the companies that specialize in making fuel lines and have them make you a replacement. You may need to send them your old fuel line, but most likely they can do it over the phone. I would be very careful because its your Dad. Earls (Holley) 310 609 1602 Ky inlinetube.com 800 385 9452 Michigan PerformancePlumbing.com 888 505 8355 Arizona
Measure the hole in the 3rd photo if it’s close to 5/16” it a -6. I have no clue where you are but a hydraulic hose supplier near me will make any style you could want or need.
Wow, that is a lot of flex hose. I would remove it and plumb in hard line and flex only form frame to engine. And I would move that line and gauge away form the header tube. As long as you are doing it, do it right.
Yes..silicon valley, Cali. He lives far away from me, and I spent the afternoon removing the line. Unfortunately, had to reinstall the line because the tank starting leaking fuel all over the shop floor. I could find no safe way to plug the exposed male compression fitting on the gauge, so had to refit the old hose to stop the flow. I only have images to work with. Id really rather buy a 48" line pre-made professionally somewhere, like Summit with the correct fittings already crimped or fastened on. And yes, I do not want even a small margin of error for leakage..my Dad is too old to deal with it and I would never live it down. We have a place called Royal Br***, here where I live, that can probably fabricate one. It means another trip over to his house and way to figure out how to plug the tank from leaking. Its in a tough spot, and the frame rail blocking access,along with header pipe and such.
In AN fittings, 1/2" thread would be a -5 fitting for 5/16 hose or tubing. The fittings for 3/8 hose would be 9/16 thread OD, and 1/2" hose would have 3/4 thread OD on the fittings. The SAE fittings are the same thread except for the -6 size for 3/8 lines, which I believe is a 5/8 thread OD. So what I am thinking is the fitting is for a -5 hose and would have 1/2-20 thread. It is very common for automotive fuel lines but I am not familiar with the braided stuff as my background is industrial.
Unless its optical illusion id worry most about how close the line/gauge are to the header. From the pic they look to almost touch. hot fuel is basically as bad as leaking fuel
Unless you have the time and ability to replace the hose properly with hard line (Nickel copper In 3/8” would be good), you should probably look up a reputable hot rod shop in the vicinity and have them do it. The 4’ braided hose was a quick way to run the fuel line and probably shouldn’t just be replaced. A properly secured hard line with a short flexible hose to the fuel pump is the way it should have been done in the first place. It’s California, surely there must be a hot rod shop capable of doing the job.
Chris, you probably used an 11/16' wrench to loosen the fitting, that would make it a -6. Stop at a local hydraulic shop and buy a AN 929-6 cap, you can take the fuel line off and prevent the fuel leak with that.
I know its not fancy looking but for low pressure fuel, push lock fittings are the bees knees. Hell people use them for trans cooler lines. Properly secured, I don't see a problem with flexible line all the way. Hydraulic systems use huge lengths of it at 2000+ psi and some decent temperatures. Big thing is to make sure its not rubbing/chafing, and isn't flopping in the breeze.
The color of fittings on AN hose does not mean anything. Many fittings are a combination of blue and red, bur recently black and silver colored fittings have become commonly available. The size thing....the -6 number means 6/16" (or 3/8" )nominal inside diameter for the hose. The actual diameter is a bit smaller than the nominal diameter, which is why someone mentioned that if it measures around 5/16", then it's probably -6 hose. I like the idea of buying a pre made length of hose with the ends attached, because it sounds like in your situation, learning how to install the ends might not be something that could easily be done. Also, as for making other changes to the system, sure, that's a good idea, but not what needs to be done right now. good luck!
Ok Guys, I really appreciate the candor and advice. I called two of my local places (Ace fuel, and Royal Br***), and neither was able to build a fuel line. The Royal Br*** place makes everything hydraulic, but not for fuel. I found this on Summit, and the supplier says its rated for gasoline. They replied to a question I posted yesterday about a dash 8 product same length and fitting. I just looked and found this one in dash six which I bet is the correct size. Yes, it should be hardlined..but my father is not doing well, and I dont know how much longer he will be able to climb in and actually drive his car. Right now, this is a mercy mission for me. I gotta get it running (albeit safely) and let him have a bit of fun. He lives way out in the country, and he isnt going far. I actually own and operate a European car repair shop..20plus years now. It keeps me busy full time, and wish I could get this rig down to the shop, but he is really weird about his "baby". Long story..you know how Dads can be. Do you guys think this will work okay for now and do you agree if its made for nitrous, should be for gas? In the description, it says "fuel" needs.
There has to be some hotrod/racecar shops up in Northern Cal. that can put something together for you. So the problem is that the hose is leaking? Performance Motorsports (San Jose) Brendan Murry http://racecarparts.com/
Chris, I edited my original post, but I think you had already read it. It has the name of companies that can make what you need. I would recommend that you get something you can bend in the shape you need. A 5/16 or 3/8 piece of rod from Lowes will do. Bend it in the shape you need to clear and still fit. You may want to reroute it to avoid the exhaust heat if there is room. Then send that to one of the companies I posted. Tell them one end needs to be solid and the other end needs to have a short flexible length (1 ft ) where it attaches to the intake.
Nitrous oxide systems on carburated cars have two plumbing systems, one for fuel, one for nitrous. So yeah, it should be ok for gasoline.
Im going to order the above hose..two weeks wait time, and see how she fits. This fuel hose is secured along the right frame rail with three rubber lined adel clamps and looks real pro. Im sure it should hold up to the little time my Dad will be driving this thing. I appreciate everyone's experience and advice very much. I wish I was retired and had time to chase down all the little leads, but I do not. Ill report back in a few weeks and let everyone know what happens. Best,
The hose you've ordered will work great. It is a better grade of hose, known as PTFE lined hose(Teflon liner), instead of the rubber liner hose you're replacing. The PTFE is impervious to all modern fuels and alcohols, won't go bad with age like rubber does either. Because of the better material, wall thickness of the hose is thinner, so it will also be a nice amount smaller in OD making it clearance fit some areas better. The PTFE hose is what almost all racers are using to replace older stainless braided rubber liner AN hose that either starts leaking or starts letting vapor p*** through it and stink up your garage due to the old hose not being able to resist modern gasoline additives and ethanol.
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