Fuel Line help 71' - Chevelle Tech
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post #1 of 11 (permalink) Old Feb 5th, 13, 7:25 AM Thread Starter
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steve
 
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Fuel Line help 71'

Ive researched for 2 days now and cant find a staright answer on what I need. How do I run the fuel lines and what size lines do I need? I plan on bending them myself. Its a mild 350 and I have the EEC(?) gas tank. The original lines are long gone. They used rubber hose the whole way on the outside of the frame. I plan on using my canister so I need to hook up the vent line(line). Short on money because of a wedding coming up and the government possibly furloughing us. Thanks for the help guys
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post #2 of 11 (permalink) Old Feb 5th, 13, 10:46 AM
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Re: Fuel Line help 71'

did you try Inline Tube, they manufacturer most of the prebent lines for the industry they also carry straight stock in Steel or Stainless.

http://inlinetube.com/Preformed%20Li.../CH-CAT-03.htm

1968 - 72 Chevelle / Malibu / SS Main Fuel Lines
--------------------------------------------------
1970-72 Main Fuel Line 1pc, PS Side, 3/8" Hardtop
1970-72 Main Fuel Line 1pc, PS Side, 3/8" Conv.
1970-72 Fuel Return Line 1pc, PS Side, 1/4" Hardtop
1970-72 Fuel Return Line 1pc, PS Side, 1/4"Conv.


1970 - 72 Chevelle / Malibu / SS Fuel Emission Lines
----------------------------------------------------
1970 Fuel Vapor Line F to R 1pc, DS Side, 5/16" Hardtop
1970 Fuel Vapor Line F to R 1pc, DS Side, 5/16" Convertible
1971-72 Fuel Vapor Line F to R 1pc, DS Side, 5/16" Hardtop
1971-72 Fuel Vapor Line F to R 1pc, DS Side, 5/16"Convertible
1971-72 Vapor Tank Line 3pc

......._________
.../ /__________\ \
</______________\>
..| O O __ss__ O O |
..\_____|___|_____/
....|__|. . . . . .|__|


1971 Chevelle Super Sport convertible
(Body-off / Documented Matching#s w/3 Build Sheets)
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post #3 of 11 (permalink) Old Feb 5th, 13, 11:10 AM Thread Starter
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steve
 
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Re: Fuel Line help 71'

haha, I didnt think about looking at their site for the sizes. Thanks
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post #4 of 11 (permalink) Old Feb 5th, 13, 11:33 AM
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Claude
 
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Re: Fuel Line help 71'

I was told that all small block Chevelles came with 5/16" diameter lines, big block cars had 3/8"...Nowadays, they can be had in 1/2" !

Claude.

1971 Chevelle "SS 496"
1987 Buick Grand National 9.48 @ 142 mph
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post #5 of 11 (permalink) Old Feb 5th, 13, 11:35 AM Thread Starter
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steve
 
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Re: Fuel Line help 71'

does it matter if I put 3/8 on? will this affect the motor?
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post #6 of 11 (permalink) Old Feb 5th, 13, 12:08 PM
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Dave
 
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Re: Fuel Line help 71'

Quote:
Originally Posted by 71'bu View Post
does it matter if I put 3/8 on? will this affect the motor?
Many of the higher horspower small blocks also had 3/8" sending units and lines. Even the current ZR1 Corvettes (638HP) and Cadillac CTSV (556HP) use 3/8" lines so you would be well served to use that size. Anything larger is just overkill on a typical street driver.

Dave
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post #7 of 11 (permalink) Old Feb 5th, 13, 4:49 PM
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Re: Fuel Line help 71'

350 Small blocks that I have seen had 3/8" lines. 307 and smaller had the 5/16".

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post #8 of 11 (permalink) Old Feb 5th, 13, 9:42 PM
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Re: Fuel Line help 71'

Did a little research and found `fuel return line' was only used on AC cars only. My non AC `71' SB only needed a 3/8 Fuel & 5/16 Vapor line.

......._________
.../ /__________\ \
</______________\>
..| O O __ss__ O O |
..\_____|___|_____/
....|__|. . . . . .|__|


1971 Chevelle Super Sport convertible
(Body-off / Documented Matching#s w/3 Build Sheets)
http://www.fquick.com/garages/viewga...=1&carid=56357
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post #9 of 11 (permalink) Old Feb 6th, 13, 12:33 AM
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Kevin
 
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Re: Fuel Line help 71'

I would use 3/8"for a feed line. On my car the BB's got a 3/8" and the SB cars had 5/16". I used a combo of braided SS and hard lines. Worked out pretty good and they feed the hungry 383 without a problem.

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post #10 of 11 (permalink) Old Feb 6th, 13, 6:45 AM Thread Starter
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steve
 
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Re: Fuel Line help 71'

OK thanks for the help guys. While my body is in the air, Im going to run the 2 line sup the passenger side for the pump, then do the line on the driver side for the canister.
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post #11 of 11 (permalink) Old Feb 6th, 13, 1:37 PM
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Re: Fuel Line help 71'

On my 71 ElCamino,an L48 350 car,it has a 3/8 fuel line on the pass side and a vapor line on the drivers side that I think is a 3/8 vapor line but I have to check to be sure.My vapor cannister is long gone so I cannot help you there.

John
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