Fuel Lines, Are plastic fuel lines o.k.? |
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Fuel Lines, Are plastic fuel lines o.k.? |
RenoRoger |
Jul 8 2014, 04:47 PM
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#1
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Member Group: Members Posts: 95 Joined: 11-November 10 From: Reno, NV Member No.: 12,370 Region Association: Northern California |
I am finally starting to restore a 1973 914 that's been sitting in my garage for 13 years. Removed the fuel tank, the fuel pump and filter which were still in their original location under the engine. The plastic fuel lines in the tunnel are original also. Porsche experts universally recommend to replace the plastic lines. Preformed stainless steel lines are available from the usual internet sources, however, they are not inexpensive at $75. Then I saw polyesthylene tubing made for Watts Manufacturing, N. Andover, MA. at Lowe's and Home Depot. 5/16 OD, 10' long for $4.99. Described as suitable for solvents and fuel. I called Watts Mfg and spoke to a technical adviser who confirmed that this tubing is quite impervious to gasoline and can be used for my purpose.
Any experience with polyethylene tubing? RenoRoger |
Cap'n Krusty |
Jul 8 2014, 04:57 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
I am finally starting to restore a 1973 914 that's been sitting in my garage for 13 years. Removed the fuel tank, the fuel pump and filter which were still in their original location under the engine. The plastic fuel lines in the tunnel are original also. Porsche experts universally recommend to replace the plastic lines. Preformed stainless steel lines are available from the usual internet sources, however, they are not inexpensive at $75. Then I saw polyesthylene tubing made for Watts Manufacturing, N. Andover, MA. at Lowe's and Home Depot. 5/16 OD, 10' long for $4.99. Described as suitable for solvents and fuel. I called Watts Mfg and spoke to a technical adviser who confirmed that this tubing is quite impervious to gasoline and can be used for my purpose. Any experience with polyethylene tubing? RenoRoger That would be "universally" except for me and a bunch of other seasoned 914 wrenches. If they're good, especially where they exit the tunnel, I recommend leaving the original lines alone. Nearly all failures can be attributed to owner/mechanic abuse or error. If I were changing them, I would go with Tangerine Racing's SS lines, especially if the car is apart. Note that the supply line is 9mm, not 8mm. $5 fuel lines are like a $29.95 brake job, they can end up costing you a fortune in the long run. The Cap'n |
Vysoc |
Jul 8 2014, 05:12 PM
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#3
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Vysoc Group: Members Posts: 586 Joined: 27-August 09 From: Young Harris, Georgia Member No.: 10,737 Region Association: South East States |
Chris Foley / Tangerine Racing Fuel Lines.
The way to go...........I sleep well at night!!! Fuel line issues..... are something that should and can be avoided. Vysoc (IMG:style_emoticons/default/flag.gif) |
r_towle |
Jul 8 2014, 05:15 PM
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#4
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
If you need to weld underneath the tunnel at the rear, or on the rear firewall near those lines, it's most likely going to melt the lines.
Remove and replace as needed....otherwise leave them till you melt them. |
pete000 |
Jul 8 2014, 07:16 PM
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#5
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Senior Member Group: Members Posts: 1,885 Joined: 23-August 10 From: Bradenton Florida Member No.: 12,094 Region Association: South East States |
I just did not like the idea of having 40 year old plastic lines. I swapped them out for the stainless. No carbeques for me.
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Krieger |
Jul 8 2014, 07:29 PM
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#6
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Advanced Member Group: Members Posts: 4,711 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None |
Some things you should not cheap out on are fuel lines.
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JeffBowlsby |
Jul 8 2014, 07:33 PM
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#7
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914 Wiring Harnesses Group: Members Posts: 8,510 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
The original tubing is Nylon 6. DO NOT use polyethylene, it has a very low heat rating and you will be pushing fuel through it in a hot engine bay. Carbeque virtually a guarantee.
I like The SS fuel lines Chris sells, but an alternate argument can be made for simply replacing them with nylon 6 tubing per the original. |
mepstein |
Jul 8 2014, 07:37 PM
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#8
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
If you don't want to spend $150 on ss lines, the cost of repairing, let alone restoring your 914 will be an eye opener.
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Elliot Cannon |
Jul 8 2014, 07:42 PM
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#9
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
If you are on a budget, you can also use steel brake lines. I only have one fuel line because I use carbs. Ten years ago I bought a long truck brake line, bent it to fit and it has worked great. Since then I have bought both supply and return lines from Tangerine Racing for when I decide to go to a 3.2 six one of these days. Real soon. Maybe in a year or two. Someday. (IMG:style_emoticons/default/laugh.gif)
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RenoRoger |
Jul 8 2014, 09:19 PM
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#10
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Member Group: Members Posts: 95 Joined: 11-November 10 From: Reno, NV Member No.: 12,370 Region Association: Northern California |
I value Cap'n Krusty's reply, a Porsche trained mechanic, with half a century's experience. I'll leave the original nylon lines in place and replace all the rubber hoses and clamps with fuel injection rated stuff. However, I must correct the Cap'n. Per my Chinese made micrometer, the supply line is 10mm and the return is 8mm. For fraction happy Americans 3/8" and 5/16" come close enough.
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Cap'n Krusty |
Jul 8 2014, 11:15 PM
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#11
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
My mistake, and I stand corrected. BTW, 3/8 line is NOT a good fit, just so you know. Try using a 10mm wrench on a 3/8 bolt .............. The hose we use for that is 9mm.
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ChrisFoley |
Jul 9 2014, 11:39 AM
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#12
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I am Tangerine Racing Group: Members Posts: 7,925 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
We use 3/8" (9.5mm) and 5/16" (7.9mm) Gates Barricade hose exclusively on fuel system work done here.
Its foolish to try and stretch a smaller size onto the fittings as was done with the original style hoses. The Barricade hose fits tightly and doesn't like to be stretched. |
jeffdon |
Jul 9 2014, 12:11 PM
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#13
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
I replaced mine with SS. However, when I was pulling the old ones out, i discovered how tough the original lines were. There was no need to replace them. They were not brittle at all, and had many years left on them.
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biosurfer1 |
Jul 9 2014, 12:25 PM
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#14
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Teener fo Life! Group: Members Posts: 3,020 Joined: 3-August 03 From: Roseville, CA Member No.: 977 Region Association: Northern California |
Roger! Great to see you posting... FYI, Roger joined up just to register for WCR this year and made it out in his great looking 912, mentioning he had a 914 in his garage that he's been "getting around to" for 13 years. Glad to see Roger posting, great guy originally from the motherland and probably still celebrating the thrashing Brazil got yesterday in the World Cup!
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76-914 |
Jul 9 2014, 12:34 PM
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#15
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,502 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
We use 3/8" (9.5mm) and 5/16" (7.9mm) Gates Barricade hose exclusively on fuel system work done here. Its foolish to try and stretch a smaller size onto the fittings as was done with the original style hoses. The Barricade hose fits tightly and doesn't like to be stretched. Chris, I bought some Barricade from you but your on line cat shows 30R9??? BTW, (IMG:style_emoticons/default/wub.gif) the Barricade product. |
ChrisFoley |
Jul 9 2014, 02:43 PM
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#16
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I am Tangerine Racing Group: Members Posts: 7,925 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
Chris, I bought some Barricade from you but your on line cat shows 30R9??? BTW, (IMG:style_emoticons/default/wub.gif) the Barricade product. My supplier changed brands on me and I never bothered to update the webpage since the Barricade meets or exceeds 30R9 spec. I now buy 250 ft rolls because I was tired of the 25 ft rolls being wound so tight it flattened out the hose. |
mtndawg |
Jul 9 2014, 03:16 PM
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#17
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Member Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None |
I always think if a team of sports car engineers came up with the solution, it's going to work fairly well (except battery trays). I like both the nylon and steel. When I had my first 914 I scoured (wasted time) on the internet looking for info about Nylon 6. It's heat tolerant and probably lasts until the end of humanity unless you're pointing a torch flame on it.
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ClayPerrine |
Jul 9 2014, 03:33 PM
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#18
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Life's been good to me so far..... Group: Admin Posts: 15,465 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I am going to put in my $.02.
I normally agree with the Cap'n, but on this I do not. Spend the money and get a set of Tangerine racing fuel lines. It is worth it for the piece of mind they offer. Having been the victim of a car fire that almost cost me my marriage, I won't own a 914 with the plastic fuel lines. The fire marshal that examined her car after the fire determined the high pressure side plastic line split and sprayed gasoline over the hot heat exchangers. Instant fire. Watching a car that is part of your heart and soul burn is heartbreaking. I know. It is not much money.. but the cost to not do it could be tremendous. |
billh1963 |
Jul 9 2014, 04:23 PM
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#19
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Car Hoarder! Group: Members Posts: 3,402 Joined: 28-March 11 From: South Carolina Member No.: 12,871 Region Association: South East States |
Shameless plug but if your car still has fuel injection look at the Tangerine racing fuel line kit I have for sale in the classifieds. All new fuel lines, fuel elbows, clamps, etc.
Even if you don't buy mine don't cheap out and do a half-ass solution. When it comes to brakes, tires, and fuel related components buy quality...it's only your life you are talking about! (IMG:style_emoticons/default/chair.gif) |
Cairo94507 |
Jul 9 2014, 06:10 PM
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#20
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Michael Group: Members Posts: 9,759 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California |
(IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/wacko.gif) (IMG:style_emoticons/default/screwy.gif) Replace them with stainless steel from Tangerine Racing please. We don't need any more stinking carbeques.
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