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Installing LR fuel lines

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Old 12-07-2011, 02:13 AM
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ZPmadA
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Default Installing LR fuel lines

I have sometime to install LR fuel lines I ordered a few months ago. I will also replace the jump line, FPR and dampener on my 86 Turbo. I will use the instructions posted on LR website:

http://www.lindseyracing.com/LR/Parts/FUELLINES.html

Anyone have any other advice? How tight should I tighten the hard lines?
How tight should it be at the FPR and dampener?

As tight as possible, or will that strip something and cause a leak?

Is there a way to pressurize the fuel system after installation without starting the car to make sure there are no leaks?

I will also replace the fuel filter with a Mann fuel filter.

Thanks all.
Old 12-07-2011, 02:43 AM
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Paulyy
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Originally Posted by ZPmadA

Anyone have any other advice? How tight should I tighten the hard lines?the stock fitting where steel, so they need to be real tight to seal, IICR the LR ones are aluminium so they still need to be tight but not as tight since it'll crush into place. you'll feel it when to stop.
How tight should it be at the FPR and dampener? Same again, if you've bought the OEM replacement, it'll need to be real tight, untill you cannot tighten any more.

As tight as possible, or will that strip something and cause a leak? If you over tighten the aluminium fittings, you run the risk of stripping the tread on the swivel

Is there a way to pressurize the fuel system after installation without starting the car to make sure there are no leaks? I think you can jump the DME relay to turn the fuel pump on. by putting pressure onto the vacuum line to the FPR only, you simulate boost(if turbo) to have more pressure in the rail. Assuming you're running a 2.5 bar FPR (36psi) and you add another 1 psi, the pressure in the rail is 37 psi, it goes up 1:1
Answers in red
Old 12-07-2011, 02:10 PM
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ZPmadA
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Not too sure what the black plastic piece on the bottom left of this picture (below the fuel lines) is for.
Old 12-07-2011, 06:29 PM
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It looks like a thing called a Wire Loom that keeps ignition wires routed next to each other neatly and keeps them from vibrating separately all over the place. You just put it either up in the middle of the fuel braided lines or near where the lines attach to the braided lines.
Old 12-07-2011, 07:24 PM
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MAGK944
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Originally Posted by ZPmadA
Not too sure what the black plastic piece on the bottom left of this picture (below the fuel lines) is for.
You'll find a bunch of those in the RH wheel well and under the RH side. They support the metal fuel lines. You will have to take one off and reinstall it afterwards to install the LR lines. Nice of them to include that in the kit as they often break when removed. Mike Lindsey is a class act!
Old 02-09-2012, 07:12 PM
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ZPmadA
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I am trying to install the LR line on the damper. The old OEM line can be tightened by finger all the way to the large nut that holds the damper. The lindsey line seems tighter on the damper. I can only turn it about two times by hand, and then need to use a wrench. It feels as if it is not metric like the damper. I'm worried this won't seal. Has anyone else experienced a 'tighter' feel with the lindsey lines, or are they suposed to tighten all the way to the nut by hand as smoothly as the old lines? BTW the damper is brand new, and the old line still tightens smoothly vs the lindsey line.
Old 02-09-2012, 07:32 PM
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Originally Posted by ZPmadA
I am trying to install the LR line on the damper. The old OEM line can be tightened by finger all the way to the large nut that holds the damper. The lindsey line seems tighter on the damper. I can only turn it about two times by hand, and then need to use a wrench. It feels as if it is not metric like the damper. I'm worried this won't seal. Has anyone else experienced a 'tighter' feel with the lindsey lines, or are they suposed to tighten all the way to the nut by hand as smoothly as the old lines? BTW the damper is brand new, and the old line still tightens smoothly vs the lindsey line.
It should go on like the old one. Try putting some ptfe plumbers tape on the threaded portion for lubrication, just once around. Don't force it, if it's not going on right there is something else wrong. Here's mine for reference:

Old 02-09-2012, 09:47 PM
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Ben951S
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Do not use white plumber tape in fuel applications. Yellow is for fuel, if yoy must.
Old 02-09-2012, 09:54 PM
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i will be doing this soon as well good luck
Old 02-09-2012, 10:08 PM
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Originally Posted by Ben951S
Do not use white plumber tape in fuel applications. Yellow is for fuel, if yoy must.
Thanks for the heads-up you've made me curious as to why you cannot use ptfe as a lubricant on fuel lines?
Old 02-10-2012, 02:46 AM
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not too tight on the FPR/damper fittings. My experience was on the compression fittings where you tie in the new braided lines to the old hard lines...you need to torque the crap out of those. I thought I had them tight and then went and started the car and fuel was spraying out like I finger tightened them. I grabbed two wrenches and torque'd the living hell out of them and got it to work. I let the car idle for a good 15 minutes before zipping everything back up to make sure there were no leaks.

Also, be VERY sure that you give yourself some slack with those braided lines - you DO NOT want them to be just long enough to hit the FPR/damper fittings. Remember that the engine rotates and if there's not enough slack there you could be in for some serious trouble. Measure appropriately and then give yourself an extra inch to be sure.

IMHO, I'd replace the fuel pump (at least replace the check valve on it - those things get funky) while your doing the filter, especially if it's never been replaced.
Old 02-10-2012, 02:56 PM
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MAGK944 - Looking at your photo, It looks like the lindsey line does not screw in all the way to the damper. There is a small space between and they are not touching each other meaning I cannot counter torque that large nut while tightening the fuel line. Is that correct? I believe the OEM line screws in all the way.
Old 02-10-2012, 03:10 PM
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Originally Posted by ZPmadA
MAGK944 - Looking at your photo, It looks like the lindsey line does not screw in all the way to the damper. There is a small space between and they are not touching each other meaning I cannot counter torque that large nut while tightening the fuel line. Is that correct? I believe the OEM line screws in all the way.
I cannot remember how the old lines fitted but here is a close up of the LR line fittings if it helps.




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