Re: EFI fuel line ??
[Re: Sniper]
#2662435
06/04/19 11:17 PM
06/04/19 11:17 PM
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Joined: Oct 2005
Posts: 8,906 Ontario, Canada
Stanton
OP
Don't question me!
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OP
Don't question me!
Joined: Oct 2005
Posts: 8,906
Ontario, Canada
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Pretty sure Fine Lines or whomever will roll you a set of bigger fuel hard lines There is nothing on Fine Lines web site which indicates they make any lines other that the shorties from the master cylinder. I'll keep searching for another manufacturer.
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Re: EFI fuel line ??
[Re: GoodysGotaCuda]
#2662511
06/05/19 08:34 AM
06/05/19 08:34 AM
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Joined: May 2019
Posts: 6,306 nowhere
Sniper
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Joined: May 2019
Posts: 6,306
nowhere
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Every remotely modern semi truck headed down the road has nylon braided fuel and oil lines on it that live with absolutely no problems over hundreds of thousands of miles. Yes, diesel is different than gasoline, but today's rubber lines are all ethanol-rated.
Hardlines are fine if that is what you want to run, but they are by far not a requirement for a successful, long-lasting system. Assuming you know how to properly install plastic/nylon lines and have the appropriate tools.
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Re: EFI fuel line ??
[Re: poorboy]
#2662797
06/05/19 07:54 PM
06/05/19 07:54 PM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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Can I guess too? I think the problem is where the hard line connects to something else. With the pressures many of the efi fuel pumps are putting out, the old rubber hose with a hose clamp can't stand the pressure very long.
I'm running a 97 Dodge efi system on my 39 Dodge truck. Originally I ran a steel line, with slightly flared ends with high pressure efi rubber hose. I clamped the hose to the line with the end of the hose past the flared part of the steel line with a pair of the efi style hose clamps. On 3 different occasions (within a month) The pump blew the hose off the steel lines. Those pumps can pump a lot of gas in a hurry. The only fix that has lasted was when I stepped up to the hard plastic lines with the special ends those plastic line require. Its been well over 6 months and the plastic line are doing well. Haven't had a fuel leak since they were installed.
My guess? The steel lines and short hoses fail too often under the high pressure the efi pumps put out. The flexible plastic lines and their connections do not fail. I would NOT recommend using steel-nickle-copper, or any other hard line with a high pressure hose and high pressure hose clamps. Use the efi designed plastic line with the correct fittings for the plastic lines. Gene That is why you flare the steel line instead of sticking with the bulb/beaded end. 37 degree single flare JIC will work for AN fittings.
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: EFI fuel line ??
[Re: astjp2]
#2662799
06/05/19 07:56 PM
06/05/19 07:56 PM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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my guesses: 1. people are lazy, its easy to run a hose and install a few clamps 2. people dont have the skills to work with hard line 3. I will fall back to number 1 which eliminates number 2
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: EFI fuel line ??
[Re: Stanton]
#2663666
06/08/19 12:02 AM
06/08/19 12:02 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I think it is mostly that the flexible lines are easier and cheaper. With the hard lines, you still need flexible hose at each end which is two more hose fittings per flexible line and two more hard line fittings per line, so with a return type system, and extra 4 hose fittings, and 4-hardline fittings. In addition to that, it would be even more expensive for them to supply new hard lines for all the different vehicles. Most cars these aftermarket EFI systems are going on only have 5/16" hard line, and no return line, and on our old cars the old steel lines are likely full of rust and other trash that will get into the injectors. I like new stainless 3/8" hard lines, but it adds several hundred dollars more to go that route.
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Re: EFI fuel line ??
[Re: moparx]
#2663768
06/08/19 12:08 PM
06/08/19 12:08 PM
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Joined: May 2005
Posts: 4,749 Florida
BDW
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Posts: 4,749
Florida
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Wrong post
Last edited by BDW; 06/09/19 07:30 AM.
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