Alfa145
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| posted on 15/2/13 at 09:57 PM |
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Fuel Return Pipe Diameter
I have an existing 6mm copper fuel pipe in my car and I'm in the process of upgrading to fuel injection and I will be fitting a new 8mm high
pressure pipe for the fuel feed and thinking of using this existing pipe as the return to tank.
Is 6mm a suitable diameter for using as a return for the new fuel injection set up?
Cheers
Rob
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daniel mason
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| posted on 15/2/13 at 10:30 PM |
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are you running an fpr at all?
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Alfa145
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| posted on 15/2/13 at 10:45 PM |
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if FPR is Fuel Pressure Reg then Yes. Just after the fuel rail.
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britishtrident
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| posted on 16/2/13 at 09:32 AM |
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6mm is fine for a return line.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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daniel mason
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| posted on 16/2/13 at 09:47 AM |
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6mm will be fine. thats what im using!
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scudderfish
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| posted on 16/2/13 at 10:14 AM |
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If you're overloading a 6mm pipe on fuel return, you need to use the loud pedal more! 
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coozer
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| posted on 16/2/13 at 11:13 AM |
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I used a 10mm pipe as return to stop it interfering with the pressure regulator.
1972 V8 Jago
1980 Z750
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coyoteboy
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| posted on 17/2/13 at 10:17 PM |
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Same diameter as your FPR feed pipe would be suitable.
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