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Re: Aluminium fuel line pressure?
[Re: SLOW67]
#1542225
12/01/13 01:14 PM
12/01/13 01:14 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Inverteed flare steel line. The aluminum uses tube inserts or shoulders, but the biggest problem is it is very crack prone, and not what I would want on a 50PSI sytem. 
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Aluminium fuel line pressure?
[Re: SLOW67]
#1542227
12/01/13 01:29 PM
12/01/13 01:29 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I dont know why they state 25 psi as the max.. that line has a MUCH higher burst pressure... hell in a production car they use plastic lines and run 50# line pressure... yes the fittings tend to be leak points and if the line is held correctly then even cracking is down to a minimum... I ran 1/2" alum line on my car and had it on there for 10 years without a single leak... I changed over to braided line and now I am thinking to go back to alum 
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Re: Aluminium fuel line pressure?
[Re: Quicktree]
#1542228
12/01/13 01:32 PM
12/01/13 01:32 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
what are you running that requires 50psi? I wouldn't run aluminum lines with today's choices out there.
If his regulator is up front and his pump output
is that high then the line pressure is 50#
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Re: Aluminium fuel line pressure?
[Re: MR_P_BODY]
#1542229
12/01/13 01:42 PM
12/01/13 01:42 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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I Win
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Quote:
Quote:
what are you running that requires 50psi? I wouldn't run aluminum lines with today's choices out there.
If his regulator is up front and his pump output
is that high then the line pressure is 50#
I understand that but most pumps can be turned down at the pump
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Re: Aluminium fuel line pressure?
[Re: Quicktree]
#1542230
12/01/13 02:11 PM
12/01/13 02:11 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Im guessing an EFI system.
Plastic may be ok in a production car, but I doubt it allowed in a race car.
With the lite weight braided lines now, I wouldnt go backwards.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Aluminium fuel line pressure?
[Re: CompWedgeEngines]
#1542231
12/01/13 02:13 PM
12/01/13 02:13 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
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Quote:
Im guessing an EFI system.
yes thats what I figured, but if it's not needed why run that much pressure?
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Re: Aluminium fuel line pressure?
[Re: Quicktree]
#1542232
12/01/13 02:32 PM
12/01/13 02:32 PM
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Joined: Sep 2009
Posts: 928
NC
SLOW67
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super stock
Joined: Sep 2009
Posts: 928
NC
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Quote:
Quote:
Im guessing an EFI system.
yes thats what I figured, but if it's not needed why run that much pressure?
I am currently running a carb but EFI is in the near future. My plan is to run ford style injectors which I have that are rated at 43psi. My EFI system is GM so my pressure will be at 58psi like a standard GM system. It will have a variable pump control so it will not be at 58 all the time but under boost it will be 58 or more. This also lets me run a smaller injector too. I can run injectors rated at 42lbs @43psi @80%duty cycle. At 58 psi they will be in the 50lb range @ 80% duty cycle and maybe higher @ 95%. My intention is to balance the injector sizing so that I can get better economy at cruise and idle and still have enough for the boost at WOT.
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Re: Aluminium fuel line pressure?
[Re: MR_P_BODY]
#1542233
12/01/13 02:35 PM
12/01/13 02:35 PM
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Joined: Sep 2009
Posts: 928
NC
SLOW67
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super stock
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Joined: Sep 2009
Posts: 928
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Quote:
I dont know why they state 25 psi as the max.. that
line has a MUCH higher burst pressure... hell in a
production car they use plastic lines and run 50#
line pressure... yes the fittings tend to be leak points
and if the line is held correctly then even cracking
is down to a minimum... I ran 1/2" alum line on my
car and had it on there for 10 years without a single
leak... I changed over to braided line and now I am
thinking to go back to alum
When you say held correctly you mean "floating" in rubber isolators? Thats how I planned on hanging it, but If there is a better way I'll do it. And yes you talked me out of putting the reg. at the back lol
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Re: Aluminium fuel line pressure?
[Re: Quicktree]
#1542241
12/01/13 03:10 PM
12/01/13 03:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
don't know you will have to call and ask, I have had ethanol in my braided line going on 2 years with no leaks.
I have 4 or 5 years on my braided line running E-85
for that time period and no issues
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I'm kind of confused over this being that it is a metallic line you would think it would hold more. My pump pushes around 50psi. Does anyone know where I can buy metallic line that is rated higher?
even our local E10% pump gas will 
That or stainless steel lines 