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Old 11-16-2004, 07:35 AM
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Dual fuel lines needed:

I have a stock 69 camaro that has the dual fuel lines, 3/8 inlet and 1/4 in return. I am looking at going to a single line only and removing the return. I also am thinking about putting on a in line filter.
I use the Edelbrock 1901 Quadrajet 4-barrel carb, on a 350/300hp, which also has a filter.
What are the opinions?

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Old 11-16-2004, 07:44 AM
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Fuel Lines

I may be wrong but I believe if you have a tank set up with a return line and a vented system you have to leave it that way without a vapor lock problem. If Doc or Poncho is listening in they can correct that if I'm wrong.
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Old 11-16-2004, 10:11 AM
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You do not have to run the "return" line. You can run a single line but, the tank must be vented (either the cap or another vent). If not you will create a vacuum and you will not be able to pump fuel.

Royce
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Old 11-16-2004, 05:50 PM
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I eliminated the return line when I plumbed my GTX (the tank is vented) In 3 summers of cruisin' in some extremely hot weather, vapor lock hasn't been a problem...
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Old 11-16-2004, 06:01 PM
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Leave the return line open at the fuel pump end. It will act as a vent. You may want to bend it upwards so the end of it is above tank level.

A vented cap behind the lisence plate might spill gas on acceleration.

Why do you want to eliminate the return line anyways?
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Old 11-16-2004, 06:15 PM
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The repop vapor seperator/fuel filter was around $40 and a 3/8" inline filter is $4.

Guess I'm too cheap...
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Old 11-16-2004, 06:18 PM
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Just bypass it............................
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Old 11-16-2004, 07:43 PM
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Thanks for a lots of info:
I am running the single line because I have a Holley mechanical pump that is not set up for a return line and I have a new single line sending unit with a new fuel tank. I don't like the setup on the return line between the carburetor and the fuel pump.
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