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Fuel line fitting size?

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Old Sep 28, 2005 | 09:19 AM
  #1  
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Fuel line fitting size?

I need to know the size of the fittings where the rubber lines meet the hard lines by the brake master cylinder. Thanks!
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Old Sep 28, 2005 | 09:22 AM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Here's a picture of my engine bay. I'm about to start her up, I just need to hook up a few more wires and the intake. But as you can see my steel hoses end, go to rubber ones, then go to the hard lines. I want to do away with the rubber lines right there. I've never worked with fuel lines before so I've no idea what I'm doing.
Attached Thumbnails Fuel line fitting size?-engine.jpg  
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Old Sep 28, 2005 | 09:34 AM
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From: West Warwick RI, postal code: 02893
Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
Well you are gonna want to go with steel braided. This is b/c the motor will want to flex under load and if you have all solid lines they will fatigues at some point. Go with braided from the solid to solid. Call Russel or any other company that sells braided lines. you can also call Jegs. They sell a AN adapter to change the stock line ends to AN type. then run normal braided hose, and they 2 more adapters and go into the fuel rail lines.

Hope this helps. Make calls you can get something like this done and figures out in 20 minutes on the phone.
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Old Sep 28, 2005 | 03:52 PM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
I somehow doubt online sales reps are going to be able to give me size of my stock hoses. I already have the fittings where it meets the fuel rails luckily.
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Old Sep 29, 2005 | 08:17 AM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Bump for the right size. Someone must have changed them before.
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Old Sep 29, 2005 | 08:31 AM
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From: West Warwick RI, postal code: 02893
Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
My last post must have not been too clear.

If you look at, or call Jegs, they sell fitting that go from the stock kind to standard AN. If you use these you can go straight from the hard line to the standard braidd hose, then to the fuel rail lines. When you buy the fittings, there is only one kind, and they say how big the standard size hose that it converts to. Buy a foot or two of that size and you are all set.

Hope this clears things up. I have seen it done. Love to see other guys here in MA. Are you ever around Boston? I live in Needham and am trying to start a local thirdgen club.

If you can't find the parts I can post links and part #s.

-Dennis
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Old Sep 29, 2005 | 08:33 AM
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
The fittings you need are hard to get since Jegs and Summit usually only have 1 of the 2 for some reason.

I believe these are the 2 you need,
-6 AN Male to 14mm x 1.50 Female
http://www.holley.com/products.asp?product=9894DBHERL

-6 AN Male to 16mm x 1.50 Female
http://www.holley.com/products.asp?product=9894DBJERL
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Old Sep 29, 2005 | 08:36 AM
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From: West Warwick RI, postal code: 02893
Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
310-74730 These are the accel fittings. I looked it up in less than a minute. The jegs web site is not all that bad.

It changes your stock style end to 6-AN.


023-FCA0603

That part # is just a quick example of some braided hose. Less than 15 bucks. All you would need after that is the fittings to go back into the fuel rail hard lines.
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Old Sep 29, 2005 | 09:49 AM
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Originally posted by dennisbernal91z
310-74730 These are the accel fittings. I looked it up in less than a minute. The jegs web site is not all that bad.

It changes your stock style end to 6-AN.
those are the wrong fittings. The hard lines on the body are male and need female fittings.

those fittings you posted are for the hard lines at the TPI fuel rail itself.
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Old Sep 29, 2005 | 10:05 AM
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From: West Warwick RI, postal code: 02893
Car: Building LS3, T56 Z28
Engine: LS3
Transmission: T-56
Axle/Gears: Moser/ 4.11
Oh my bad. I kinda rushed and only took a few seconds to look up the parts. Sry.

Your list is def correct.
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Old Sep 29, 2005 | 11:42 AM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
So I can get those plugs and -6AN hose and it'll plug right in then use hose clamps to keep it tight?
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Old Sep 29, 2005 | 01:00 PM
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
you don't use hose clamps on braided line with AN fittings.
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Old Sep 29, 2005 | 04:31 PM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
What connectors do I use then?
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Old Sep 29, 2005 | 06:31 PM
  #14  
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Well, the HSR Fuel rail has AN fittings, the Hard line adaptors have AN fittings, so you get a length of steel braided line, cut it into 2 smaller lines, get 4 -6AN hose ends and that is it.

You will be making 2 new lines to go from the body to teh HSR.
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Old Sep 29, 2005 | 06:51 PM
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Thanks, thats all I needed!
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Old Sep 30, 2005 | 09:43 AM
  #16  
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Ignore this accidental bump. Thanks again guys!

Last edited by firebirdjosh; Sep 30, 2005 at 09:46 AM.
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Old Oct 7, 2005 | 08:38 AM
  #17  
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Originally posted by Zepher
Well, the HSR Fuel rail has AN fittings, the Hard line adaptors have AN fittings, so you get a length of steel braided line, cut it into 2 smaller lines, get 4 -6AN hose ends and that is it.

You will be making 2 new lines to go from the body to teh HSR.
Actually the hardline that sends fuel to the rails isn't -6AN. Anyone know what size it is? Its clearly larger than the other side. Also, can I use -6AN on one side of a hose and -xAN on the other size?
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Old Oct 7, 2005 | 10:33 AM
  #18  
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
on my HSR rail, the back pass side is -6an and on the end of the regulator has -6an. I had the complete kit from Holley.
Was yours used or new?
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Old Oct 7, 2005 | 12:39 PM
  #19  
firebirdjosh's Avatar
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
My rails from holley are both -6AN, but I'm talking about the hardlines that travel the body of the car. They end under the brake master cylinder area. The return line is -6AN. The other is slightly larger. Do you happen to know the size?
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Old Oct 7, 2005 | 01:00 PM
  #20  
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
The fittings I posted above are the ones you need to adapt the hard lines on the body to -6an.

-6 AN Male to 14mm x 1.50 Female
http://www.holley.com/products.asp?product=9894DBHERL

-6 AN Male to 16mm x 1.50 Female
http://www.holley.com/products.asp?product=9894DBJERL
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Old Oct 7, 2005 | 01:07 PM
  #21  
firebirdjosh's Avatar
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Thats weird, my -6AN fittings went right on the smaller 14x1.5mm fitting no problem. The -6AN on the 16x1.5mm isn't even close to fitting though.

Thanks for the help, found the fitting at summit!

Last edited by firebirdjosh; Oct 7, 2005 at 01:32 PM.
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