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Thread: Fuel line size

  1. #1
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Fuel line size

    quick Q

    3/8 or 5/16 for fuel lines. looking to flow enough fuel for 230rwk. i would think 5/16 would be plenty.

    cheers mat
    Last edited by river; 16-07-2008 at 08:12 AM. Reason: Rename title to something more technical

  2. #2
    AVGAS DRINKING Carport Converter 30psi 4agte's Avatar
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    Default Re: bigmat

    5/16 will easy flow 230rwkw

  3. #3
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Re: bigmat

    cheers 30psi. brake lines and fuel lines monday it is. not long now and ill be driving.

  4. #4
    Junior Member Conversion King timbosaurus's Avatar
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    Default Re: bigmat

    What are you doing with respect to the fuel lines Mat?

    I ended up buying some aluminium pipe from VPW, and just bending it by hand to suit. Bit of a quick job, but does the trick. It was the only way to get it done quickly.

    Keen to hear what others are doing.
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  5. #5
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Re: bigmat

    using 5/16 bundy. using the old brake line routes to hold it in place and running new brake lines.......

    cheers mat.

  6. #6
    Junior Member Conversion King timbosaurus's Avatar
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    Default Re: bigmat

    steel bundy eh? mind me asking where you get it, and what's it worth? The 3/8 (i think) aluminium tube I got from VPW was $10 a metre, and I used about 6 metres. Interested to know whether there are any cheaper options.

    Out of curiosity, why are you running new brake lines? I would have thought it easier to leave them where they are and find a new route for the fuel lines.

    Timbo
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  7. #7
    umop apisdn Chief Engine Builder twentyEight's Avatar
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    Default Re: bigmat

    Forgive my ignorance as I haven't looked under the car at this yet, but what stops you from running the new fue line where the old fuel line ran?
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  8. #8
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Re: bigmat

    well it could be the old fuel line but we think its the old brake line............i received this car as a shell and nuts and bolts so who knows.

    can you have a look at yours and tell me if the fuel lines run along the tunnel.......

    as long as its safe and works im happy

    cheers mat

  9. #9
    ---------HO00NS---------- Chief Engine Builder IN 05 NT's Avatar
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    Default Re: bigmat

    brake lines run in the trans tunnel, teh fuel lines run along the floor near the chassis....thats a 23 tho.

  10. #10
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Re: bigmat

    any pics.......................?

  11. #11
    Hopefully soon a 5S-GTE Chief Engine Builder MWP's Avatar
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    Default Re: bigmat

    This is how i ran mine... dont know what stock lines were like though.


  12. #12
    Junior Member Conversion King timbosaurus's Avatar
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    Default Re: bigmat

    Mat, the actual fuel delivery and return lines actually run along the drivers side. Traceing them from the bay, they go past the steering box, along the trans tunnel, under the drivers' side rear seat, then cross over above the diff. They then turn to rubber hoses which lead to the tank.

    There is a hard line on the passenger side which is the fuel tank vent leading to the charcoal cannister.
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  13. #13
    Junior Member Backyard Mechanic bigmat's Avatar
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    Default Re: bigmat

    cool. do i have to use the charcoal box even though i have a newer motor?
    better ask the engineer i think

    cheers mat

  14. #14
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: bigmat

    yup, charcoal box is for fuel tank emissions, not engine

    brake lines to rear shoud be same size as from master to fronts.. ie pretty darn small..

    steel bundy good. alloy and copper not so good.. easier to accidentally break off the flares etc and not notice
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  15. #15
    Hopefully soon a 5S-GTE Chief Engine Builder MWP's Avatar
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    Default Re: bigmat

    Quote Originally Posted by bigmat
    cool. do i have to use the charcoal box even though i have a newer motor?
    better ask the engineer i think
    No need to ask, you definitely do need it.
    You need to run 3 lines from the engine bay to the tank (feed, return, evap).
    The the evap line runs from the plastic separator (i think you were missing this?) located above the fuel filler pipe to the charcoal can in the engine bay.

    The thinner steel line in my photo above is what i used for the evap line.

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