Where is the return fuel line on an LS1?
12-05-2007, 09:31 AM
#3
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It is going into my 57 Chevy.
I'v got my fuel tank (F-150 rear steel tank w/ top vent) setup with a 255 lph pump and am getting ready to run my lines. I've got 5/16" for the return and 3/8" for the send.
1.) I plan on placing an inline filter on the send line, but do I also need a regulator of any kind?
2.) How do I go from a hard line to the hard line nipple on the LS1 fuel rail?
3.) Where does the return line connect on an LS1?
I'v got my fuel tank (F-150 rear steel tank w/ top vent) setup with a 255 lph pump and am getting ready to run my lines. I've got 5/16" for the return and 3/8" for the send.
1.) I plan on placing an inline filter on the send line, but do I also need a regulator of any kind?
2.) How do I go from a hard line to the hard line nipple on the LS1 fuel rail?
3.) Where does the return line connect on an LS1?
12-05-2007, 09:52 AM
#5
I would suggest using either the 99'+ Vette Regulator/Filter (or a Bypass regulator) near the rear, close to the tank. This way you only have to run a 3/8" (or larger) from tank to fuel rail. Search on it and you will find many are using it.
1) yes. you need a regulator to keep it at 58psi.
2) You can use Compression fitting to AN and Stainless steel (or others) braided hose.
3) There is no return line on a F-Body, the pump/regulator/return is all in the tank. Only the 97'-98' Vette had return lines from the fuel rail, 99'+ vettes used the intergraded Regulator/filter. (AC Delco GF822) As I have recommened above to use. Then just run the return line from the regulator/filter back to the tank (5/16").
1) yes. you need a regulator to keep it at 58psi.
2) You can use Compression fitting to AN and Stainless steel (or others) braided hose.
3) There is no return line on a F-Body, the pump/regulator/return is all in the tank. Only the 97'-98' Vette had return lines from the fuel rail, 99'+ vettes used the intergraded Regulator/filter. (AC Delco GF822) As I have recommened above to use. Then just run the return line from the regulator/filter back to the tank (5/16").
12-05-2007, 10:02 AM
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3) There is no return line on a F-Body, the pump/regulator/return is all in the tank. Only the 97'-98' Vette had return lines from the fuel rail, 99'+ vettes used the intergraded Regulator/filter. (AC Delco GF822) As I have recommened above to use. Then just run the return line from the regulator/filter back to the tank (5/16").
Just to clarify, the AC Delco GF822 reg/filter has two ports on one end and one on the other. Coming from the tank, I will have two lines (one send 3/8" and one return 5/16") going to the reg/filter. Continuing on from the reg/filter, will be one 3/8" line that will go to the fuel rail.
Do I understand it correctly.
12-05-2007, 10:11 AM
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Chevrev - I have a LS7 in my 57 Bel Air and use the Vette filter with integrated regulator that bczee recommended. S & P sells a kit with the filter and adaptors to allow AN lines to be used. Mounts near the fuel tank. Works great and simplifies the plumbing. 
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12-05-2007, 11:09 AM
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I'll check the kit out.
I really know next to nothing about fuel line fitting, etc...
-What does AN mean?
-What do the numbers, -3 AN, -6 AN, etc... mean? Is this a size?
From my sending unit, I have two metal lines, one 3/8" and one 5/16".
[IMG]
[/IMG]
-What fitting, line, etc... would i use to connect these to my steel tubing.
Also, would you recommend steel, stainless steel or aluminum line. I currently have steel line, but would like to use stainless or aluminum if I can squeeze it into my budget ...Which BTW is already oozing out from every pore and orifice!
Do you know of any threads that would be a great 'learning seminar' on fuel and brake plumbing?
I really know next to nothing about fuel line fitting, etc...
-What does AN mean?
-What do the numbers, -3 AN, -6 AN, etc... mean? Is this a size?
From my sending unit, I have two metal lines, one 3/8" and one 5/16".
[IMG]
[/IMG]-What fitting, line, etc... would i use to connect these to my steel tubing.
Also, would you recommend steel, stainless steel or aluminum line. I currently have steel line, but would like to use stainless or aluminum if I can squeeze it into my budget ...Which BTW is already oozing out from every pore and orifice!
Do you know of any threads that would be a great 'learning seminar' on fuel and brake plumbing?
12-05-2007, 11:44 AM
#10
AN is Air Force - Navy Aeronautical Standard or Air Force - Navy Aeronautical Design Standard that is used by the US Militrary for Aviation.
The AN - (dash) standards convert to inches would be like a -6 would be 3/8" inch, -8 would be 1/2". If you notice that they come out to 1/16" inches increments. for AN -8 that woudl be like 8 x 1/16 = 1/2"
Depending on your application and if you need to go by any saction rules. You can just about us any of the standard tubing and hose. I have a Stainless Steel Hard line between my Tank and Engine. I use AN fitting and Stainless steel hose to connect the hard line to the fuel rail and the tank/regulator/filter.
Off hand. .no.. but there are many thread.. just search out fuel system, regulators, fuel lines... etc..
Yes.. as Wardrum stated, S&P and other Sponser and vendor have complete kits. But if you figure it out... you can build what you need and save a bit of $$.. just look over some of the picture you find of the kits and can be taylored for you car.
You can just about get any type of AN fitting to adapter (37 deg flare, compression, O-Ring). If you use AN for your Power steering, use the correct rated hose, Russell had Teflon Line Steel Braided hose that I am using. Very high pressure rated. You can get them in straight, or elbows and bends in 45, 60, 90 120, 180 degs... etc..
The AN - (dash) standards convert to inches would be like a -6 would be 3/8" inch, -8 would be 1/2". If you notice that they come out to 1/16" inches increments. for AN -8 that woudl be like 8 x 1/16 = 1/2"
Depending on your application and if you need to go by any saction rules. You can just about us any of the standard tubing and hose. I have a Stainless Steel Hard line between my Tank and Engine. I use AN fitting and Stainless steel hose to connect the hard line to the fuel rail and the tank/regulator/filter.
Off hand. .no.. but there are many thread.. just search out fuel system, regulators, fuel lines... etc..
Yes.. as Wardrum stated, S&P and other Sponser and vendor have complete kits. But if you figure it out... you can build what you need and save a bit of $$.. just look over some of the picture you find of the kits and can be taylored for you car.
You can just about get any type of AN fitting to adapter (37 deg flare, compression, O-Ring). If you use AN for your Power steering, use the correct rated hose, Russell had Teflon Line Steel Braided hose that I am using. Very high pressure rated. You can get them in straight, or elbows and bends in 45, 60, 90 120, 180 degs... etc..
12-05-2007, 01:20 PM
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what type of fitting is required to connect to the 3/8" tubing to the outlet port of the filter/regulator? For the inlet 3/8" and 5/16" could I just use fuel injection rated rubber hose and double clamp?
Is distance from the tank to the location of the filter/reg a critical factor?
Is distance from the tank to the location of the filter/reg a critical factor?
12-05-2007, 03:24 PM
#13
Most are using after market Quick Disconnents.. I use the Russell 3/8" and 5/16" to AN -6 fittinga and hoses. A few have modify the original fitting and tubings. There is a kit to help in OEM Q/D fitting and plastic/poly hose. Doman has it.
The distance is of no critical factor..
The distance is of no critical factor..
12-05-2007, 07:39 PM
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Could I just slip 3/8" fuel injection rated hose over the bead and clamp on both sides of the bead. Wouldn't this work fine, although not the prettiest...or is there too much pressure?
Last edited by chevrev; 12-05-2007 at 08:07 PM.
12-05-2007, 11:03 PM
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Yeah, your probably right. Besides, I know that if I don't do it the way that I want it, then I'll end up redoing it!
I built a complete exhaust system in aluminized steel, 2 1/4", and before I even did the final install, I had ordered 3" stainless tubing and bends!
I completely cleaned, prepped and painted the C4 suspension components after deciding against replacing all the bushing, ball joints etc...and yep...before installing it, I ripped out all the old bushings and put new ones in...of course messing up the paint and making more work and cost for my self in the long run.
It's like buying cheap tools...I always end up getting the better one eventually and look back at all the time that i wasted with that piece of junk and...
Well, that's enough, but i've got a whole laundry list of "...it's not quite good enough...redo it"
I built a complete exhaust system in aluminized steel, 2 1/4", and before I even did the final install, I had ordered 3" stainless tubing and bends!
I completely cleaned, prepped and painted the C4 suspension components after deciding against replacing all the bushing, ball joints etc...and yep...before installing it, I ripped out all the old bushings and put new ones in...of course messing up the paint and making more work and cost for my self in the long run.
It's like buying cheap tools...I always end up getting the better one eventually and look back at all the time that i wasted with that piece of junk and...
Well, that's enough, but i've got a whole laundry list of "...it's not quite good enough...redo it"
