Confirming fuel line sizes
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Joined: May 2003
Posts: 445
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From: Delco pa
Car: 85 Z28
Engine: GMPP 350 HSR
Transmission: 700R4
Axle/Gears: 4th gen 3.42 Posi LS1
Confirming fuel line sizes
I am cutting my oem lines down at the frame rail for -6an lines to my HSR. I ordered 3/8 and 5/16 compression to female an adapters. Will this work?
Joined: Dec 2004
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Confirming fuel line sizes
Your right on the line size. You can also flare the line to an and use a an fitting and tube nut.
Joined: Dec 2004
Posts: 16,751
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Confirming fuel line sizes
Iirc 5/16 is a odd size like an-5 jic
https://www.jegs.com/i/Earls/361/165156/10002/-1
https://www.ebay.com/itm/0318-05-Ste...sAAOSwStdbEJdF
https://www.jegs.com/i/Earls/361/165156/10002/-1
https://www.ebay.com/itm/0318-05-Ste...sAAOSwStdbEJdF
Last edited by Tuned Performance; Feb 14, 2019 at 06:22 PM.
Thread Starter
Joined: May 2003
Posts: 445
Likes: 6
From: Delco pa
Car: 85 Z28
Engine: GMPP 350 HSR
Transmission: 700R4
Axle/Gears: 4th gen 3.42 Posi LS1
Re: Confirming fuel line sizes
Thanks for the help. I have both compression to -an adapters on the way. Now to route the braided lines away from my longtubes is gonna be the next fun part..
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Joined: Jun 2014
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From: Iowa
Car: 16' Silverado
Engine: 5.3
Re: Confirming fuel line sizes
I'm going to need to do this to my fuel lines also but I don't have a clue as to what's required to get the job done. I know my lines are 5/16 and 3/8 like was stated. Any particular way this should be done? Do the compression type fittings tend to leak so a person should use the type that require the lines to be flared?
Joined: Sep 1999
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: Confirming fuel line sizes
No, friction is the only thing holding the compression piece to the line. Under pressure it can push out of the fitting. This is why you don't use them for applications like fuel systems
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Joined: Dec 2004
Posts: 16,751
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Confirming fuel line sizes
You can flare both lines to 37 degrees. You just need a tube sleeve and nut.
https://www.hoseandfittingsetc.com/p...eves/parker-tx
https://www.hoseandfittingsetc.com/p...ves/parker-btx
You also need to find a jic 5-6 male to male fitting. This might be the challenge.
parker makes one 6-5 HTX
https://www.hydradynellc.com/product...ion-triple-lok
https://www.hoseandfittingsetc.com/p...hts/parker-htx
https://www.speedwaymotors.com/Speed...ool,29380.html
You can get the an-6 in aluminum or steel. I prefer the steel. More robust.
https://www.hoseandfittingsetc.com/p...eves/parker-tx
https://www.hoseandfittingsetc.com/p...ves/parker-btx
You also need to find a jic 5-6 male to male fitting. This might be the challenge.
parker makes one 6-5 HTX
https://www.hydradynellc.com/product...ion-triple-lok
https://www.hoseandfittingsetc.com/p...hts/parker-htx
https://www.speedwaymotors.com/Speed...ool,29380.html
You can get the an-6 in aluminum or steel. I prefer the steel. More robust.
Last edited by Tuned Performance; Feb 15, 2019 at 12:10 PM.
Re: Confirming fuel line sizes
I'd stay away from compression fittings in this application.....IMO, not a good idea
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