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I want to change the fuel line out to make it new again, the c3 that I bought had been sitting outside for a while and the metal fuel line looks like it's got a few bends and kinks in it. Should I make a new metal fuel line or can I run a rubber line from the mechanical pump up to the carb?
Me thinks he should fab his own steel line from pump to carb with an inline metal filter & NO rubber.
Yeah that's the Problem im running into the old steel line doesn't line up correctly with the new carb. and no it doesn't have it's own fuel filter so I need to use an inline filter.
Perhaps this all metal in-line filter MIGHT work for a DIY steel pump to carb line ... WIX pn 33265 ... OD = 2.17", Height = 4.215 ... threaded both in & out = 14 x 1.5mm inverted flare
Just a bit larger than present-day TP tube. A cursory search yielded Very Few with US/SAE threads YMMV https://www.wixfilters.com/Lookup/Pa...px?Part=111275
Me thinks he should fab his own steel line from pump to carb with an inline metal filter & NO rubber.
Exactly!
Originally Posted by Minsupa
Yeah that's the Problem im running into the old steel line doesn't line up correctly with the new carb. and no it doesn't have it's own fuel filter so I need to use an inline filter.
@lars has a paper for fabricating your own all-metal fuel line for this type of application. It shows how to convert from steel to AN fittings and back. PM me if you need his email, but it's all over the Forum.
Last edited by Bikespace; Mar 1, 2020 at 06:02 PM.
The problem with this is the inner liner is ordinary rubber fuel line. It will eventually rot with the all the additives in modern fuels. However, there are rubber fuel lines that will not rot as Holley sells such a fuel line. There are PTFE lines that are braided that work well. Just keep them away from High heat.
Easy to bend new hard lines-- a piece of brake tubing from your local parts store, a tube bender and a flaring tool. I make all my own lines and flare for whatever fittings I'm going to use. Brake tubing is soft enough to be easy to work with. And if you get really busy, it can be polished a little and clear coated.
There are a few choices for hard lines: Steel, stainless steel, aluminum or copper/nickel. I think the easiest to work with is copper/nickel or aluminum They are easy to bend. For a fuel line you could flare it but you do not have to. You can use compression fittings of the appropriate size. You can use an AN fitting in the carb and fuel pump and an AN compression fitting on the line. The AN fittings have an internal flare. You can go to Harbor Freight and get a cheap tubing bender so you will not kink the tube when you bend it.
Why not go -6 braided AN hose? All you need is some fittings and a nice cutter......it is resistant to heat and wear too. https://www.summitracing.com/parts/sum-230606
You can get the flare to -6 AN fitting if you look for the fuel pump.....then just run a small log filter: https://www.summitracing.com/parts/sum-230102
I do most of my pump to carb lines this way......I just did this 340 Demon a few weeks ago:
And these hand cutters are awesome for -6 and -8 braided line......cuts it nice and clean. https://www.mcmaster.com/3563a71
You will have to learn how to make braided AN fittings....but it is not hard......actually it is quite fun
Why not go -6 braided AN hose? All you need is some fittings and a nice cutter......it is resistant to heat and wear too. https://www.summitracing.com/parts/sum-230606
You can get the flare to -6 AN fitting if you look for the fuel pump.....then just run a small log filter: https://www.summitracing.com/parts/sum-230102
I do most of my pump to carb lines this way......I just did this 340 Demon a few weeks ago:
And these hand cutters are awesome for -6 and -8 braided line......cuts it nice and clean. https://www.mcmaster.com/3563a71
You will have to learn how to make braided AN fittings....but it is not hard......actually it is quite fun
Jebby
As I mentioned earlier, this hose will rot using the current fuel. PTFE braided hose will work for a long term solution. There are so many organic compounds in todays fuel that will permeate right thru the rubber. There are a couple rubber hoses that claim to work,. Holley has one called Vapor Guard and so does Gates called Barricade.
Why not go -6 braided AN hose? All you need is some fittings and a nice cutter......it is resistant to heat and wear too. https://www.summitracing.com/parts/sum-230606
You can get the flare to -6 AN fitting if you look for the fuel pump.....then just run a small log filter: https://www.summitracing.com/parts/sum-230102
I do most of my pump to carb lines this way......I just did this 340 Demon a few weeks ago:
And these hand cutters are awesome for -6 and -8 braided line......cuts it nice and clean. https://www.mcmaster.com/3563a71
You will have to learn how to make braided AN fittings....but it is not hard......actually it is quite fun
Jebby
So you can run -6 braided AN hose from the mechanical pump past the engine and up to the carburetor without worrying about heat or a fire then?
If you don't need to re-make a lot of fuel or brake lines for the car (or other vehicles you own), just buy a stock replacement line that is already made to fit.
If you decide to DIY the lines, go to your local auto parts store, buy the inexpensive flare-tool kit and purchase a length of CuNi (copper-nickel) line of the correct diameter. The CuNi stuff is good for fuel or brake lines, is a LOT more flexible and easier to form than regular steel lines and you can then make up anything you want.
If you want to DIY lines out of steel, you NEED to buy a good flare-making tool set or you will find that the inexpensive tools will soon fail (unless using CuNi lines).
Fuel line updates
