I have a single teflon lined AN hose from the fuel pump filter back by the fuel tank to the driver frame rail by the lower radiator hose.
Same here, I have no hard line, it's all braided hose from the tank to the carb. I just looked at my original invoice from Summit and it appears I have just rubber hose from Aeroquip FCA0615. For $2 more, I could have bought the teflon PTFE lined hose, FCC0615. I guess I didn't know what I didn't know. It does say the rubber liner is "compatible with most fuels, coolants, and oils", I thought that meant it was fine for gasoline, but maybe not for alcohol or some exotic fuel (nitro). After 6 years and 17k miles, I haven't had a hint of a leak, but I think I know what my winter project will be.
As for me a 55gal drum of Sunoco 260 GTX is waiting for my car. Yes, it is more expensive but so is the car. I have pure gasoline free from additives which harm the performance, gas mileage and on top it has 5 years shelf life (pump gas 4-6 Month).
I think there is still a lot of mis-information on AN hose, fittings, materials, and how to make them. Earl's store has a few vids on the topics. There are some on the WWW if you search Google for them.
The vid on OEM tubing adapters shows how to adapt to hard lines without flaring the tube. These use a compression ring technique. Flaring is a little more secure though, if you can get a flaring tool and a tube sleeve and nut on the tube. Here's a couple of pages on how to bend hard lines, flaring the ends and using tube sleeves and nuts to connect to AN adapters.
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Last edited by ROADRACER83; 08-02-2012 at 02:43 PM..
Also, should I use 3/8" steel or aluminum tubing? Is either metal not compatible with the earl's fitting above? Aluminum sounds easier to install, but more vulnerable to damage?
Finally, I'll replace the remainder of SS braids with the Aeroquip mentioned in earlier posts.
My car is a carbed 392 with a mechanical pump. It is a low pressure system without a return line (set to 4psi). Assuming proper fit, I should be well within parameters of all components, right? Does anyone foresee issues I haven't? Thanks in advance.
I too want to go to current-fuel-compatible hoses! Right now I've got, as instructed in my MkII's manual, rubber hoses connecting the tank pipes to hard pipes in the RR wheel well, hard pipes leading to the front of the passenger wheel well where rubber hoses connect them to the hard pipes of the EEC IV fuel rails, with good ol' hose clamps holding it all together.
I'd like to do stuff like CobraCruz says, but with electronic injection, will the flare connectors handle the fuel line pressure? They're rated at 50 psi, which should be more than enough for carb, but does anyone know if this will work with EFI?
I'm actually converting from braided stainless steel. The Earls AN fitting should allow a pretty painless switch.
I'm leaning towards the 3/8" aluminum solid fuel line. In my mind, it seems like an easier tubing to work, but wonder if SS would be safer. The Earls compression ring seals around either metals equally, right?
Also, its probably wise to use the flares on EFI. I think using the compression ring on such high pressures is a bit risky. However, I'm probably the farthest from an expert. Any advice out there?
These are the type of things we're talking about here, right?
These are on '50s MGs, so their fuel pumps only need to make enough pressure to keep the carbs full.
The second pic is for sure rubber hose under there. The top pic almost looks like teflon hose but the ferrules are wrong. Those are for air hoses and it looks like it was crimped on a dayco crimper.
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It's the second picture I'm interested in, and the line on the left in particular. The braided sheath stuff on the right could be rubber underneath, but like brake hoses, you could make one out of teflon.
On the left, it looks like a copper pipe has been flared to take the fitting to connect it to the flex hose-- those are the fittings rated at 50 psi-- will they work at EFI pressure?
I was poking around on various hose sites a couple of months ago and I'll edit in the things I was looking at when I get a better chance later today. (Lunch break is ending!)
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