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Thread: Fuel line size

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    Spanner Monkey Turbosport Subscriber

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    Fuel line size

    Various posts already but mostly reference using AN8 fuel lines, would AN6 be large bore enough for Jenvey throttle bodies or do I need AN8

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    Re: Fuel line size

    All depends on the power you are asking the fuel supply to produce! Dash 6 ptfe is about 6mm ID and has coped 'just' with 350hp on one installation I did - really should be bigger for comfort!

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    Re: Fuel line size

    Can you use 8mm microbore plumbing pipe it's copper?

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    Re: Fuel line size

    i have plenty of times

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    Re: Fuel line size

    So is the 8mm microbore, good to go, is the 8mm the id or od, I'm putting a blacktop in a mk 1 escort
    Last edited by Cozziepower; 18-12-2015 at 19:46.

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    Re: Fuel line size

    dextrnal but unless your going to run over 500bhp it will be big enough

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    Re: Fuel line size

    Thanks Graham

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    Re: Fuel line size

    Quote Originally Posted by Cozziepower View Post
    Can you use 8mm microbore plumbing pipe it's copper?
    That's what I used run in my race car when it was on carbs, then changed the feed to braided ptfe and used the copper pipe as the return to the swirl pot when I converted to Jenveys.

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    Re: Fuel line size

    6AN 3/8" is plenty good enough for 600BHP
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    Re: Fuel line size

    I use 6AN for supply and return on cos N/A, as found on this forum.
    Many are using AN8 for supply, but with around 220hp, I thinks this is not required.

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    Re: Fuel line size

    Copper for fuel pipe.....only if you want a fire.

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    Re: Fuel line size

    Quote Originally Posted by Erikmex View Post
    Copper for fuel pipe.....only if you want a fire.
    ???????

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    Re: Fuel line size

    Just because it can work harden with vibration and fracture, I always try and avoid using copper even for brake pipes. Cunifer is better, but for fuel pipes I'd always use something where vibration or impact won't be an issue.

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    Re: Fuel line size

    TBH i think your looking at the theoretical problem that doesnt really exist, certainly not if you clip the pipe to the body rather than leave it flapping in the breeze.

    Anything CAN fail, its hard to get better fittings than Goodridge, but ive had one develop a fuel leak, a mate of mine had a wrc escort catch fire ( thankfully no real damage) again with a faulty top quality fuel pipe fitting that cracked, whilst ive never had or known of an issue with loads of cars running copper fuel pipe, so on that basis i'd say that £10 worth of B+Q copper pipe is safer that £500 worth of aeroquip.

    if using copper pipe and rubber hose i always solder an olive on the end of the pipe, that makes a nice smooth flare so theres no danger of damaging the hose or it coming off

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    Re: Fuel line size

    Quote Originally Posted by Graham View Post
    TBH i think your looking at the theoretical problem that doesnt really exist, certainly not if you clip the pipe to the body rather than leave it flapping in the breeze.

    Anything CAN fail, its hard to get better fittings than Goodridge, but ive had one develop a fuel leak, a mate of mine had a wrc escort catch fire ( thankfully no real damage) again with a faulty top quality fuel pipe fitting that cracked, whilst ive never had or known of an issue with loads of cars running copper fuel pipe, so on that basis i'd say that £10 worth of B+Q copper pipe is safer that £500 worth of aeroquip.

    if using copper pipe and rubber hose i always solder an olive on the end of the pipe, that makes a nice smooth flare so theres no danger of damaging the hose or it coming off
    Yeah I suppose, I've just seen copper pipe fail lots of times, brake and fuel, cunifer is only slightly more expensive and is much better and safer in my opinion.

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    Re: Fuel line size

    Just for reference, working with TVR's back in the late 90's, I noticed they used 8mm micro bore copper pipe for fuel on all their cars, the Cerbera AJP 4.5 V8 ran fine, so I'm sure our classics will be ok.

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    Re: Fuel line size

    Quote Originally Posted by Clint View Post
    6AN 3/8" is plenty good enough for 600BHP
    Picking up this old thread to ask this question again. Although most tend to use 8AN for the feedline, I'm tending to agree with Clint. Surely, with a high pressure pump, smooth bore pipe, and gentle radius bends, 6AN should do the trick?

    I'm in the process of plumbing lines for a 2.5 Duratec with turbo and was planning on using 6AN for feed and return. What do folks think?

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    Re: Fuel line size

    it will be fine

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    Re: Fuel line size

    I followed the advice and went for 6AN for the supply and feed but used 8AN from the tank to the pump






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    Re: Fuel line size

    How much clearance is there between the spring and the 90 deg, fitting into the tank? One good bump - could be tragic!

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    Re: Fuel line size

    Quote Originally Posted by katana View Post
    How much clearance is there between the spring and the 90 deg, fitting into the tank? One good bump - could be tragic!
    I'll 2nd that.

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    Re: Fuel line size

    Plenty, just looks deceiving in the photo. Hanger would basically have to go horizontal to have any effect as it’s hard up against the chassis

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    Re: Fuel line size

    Trust me, plenty, spring hanger would have to go horizontal first and what’s the chances of that

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    Re: Fuel line size

    I like that all black hose and fittings - where did you get em Donnie?
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    Re: Fuel line size

    Cheers - They all came from a company called torques, good quality and no issues and found them on eBay

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