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Thread: Copper Fuel Pipe - what diameter.

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    Copper Fuel Pipe - what diameter.

    I'm running copper fuel pipe down the inside of the MK2 Escort I'm building (running Zetec on standard injection). I plan to flare either end of the copper pipe and use high pressure rubber pipe for the bendy parts.

    Does anyone know what diameter copper pipe I need for this? The standard internal diameter rubber hose needs to slide over the copper pipe at either end.

    Any help appreciated.

    Thanks.

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    Re: Copper Fuel Pipe - what diameter.

    Is there any reason why you can't get a roll of 8mm copper pipe from B&Q and use that?

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    Re: Copper Fuel Pipe - what diameter.

    No reason as long as the rubber pipe will slide over it.

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    Re: Copper Fuel Pipe - what diameter.

    Do not attempt this please!!! Use some proper jic connectors on the copper pipe and get the corresponding fittings on the injection hose too. I wouldn't trust a flare and hose clip to take the pressure on fuel injection, maybe for carbs but not injection.

    Try Think Automotive in Isleworth for the bits http://www.thinkauto.com/

    She's built like a Steakhouse, but handles like a Bistro

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    Re: Copper Fuel Pipe - what diameter.

    i normally agree with richard, but i think hes being a bit over cautious on this one,

    i've run 8mm copper pipe with flare for years on injected motors with never a problem, includin my race cars where incidently once the boost is up and the fuel pressure regulator has done its thing the fuel pressure is in the region of 60psi.

    until very recently vauxhall used push fit rubber hoses and normal hose clips over flared pipes on all there injected cars and many many car manufacturers use push fit hoses and clips on injection fuel filters
    Last edited by Graham; 08-11-2007 at 20:27.

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    Re: Copper Fuel Pipe - what diameter.

    this is true but for the sake of a couple of quid I would use a bulkhead fitting just for neatness.

    She's built like a Steakhouse, but handles like a Bistro

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    Re: Copper Fuel Pipe - what diameter.

    My manta is just copper flared from new
    Its also what im doing to the escort

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    Re: Copper Fuel Pipe - what diameter.

    Have a look at this http://www.turbosport.co.uk/showthre...108910&page=20

    I also bought these as i was unsure about flaring the pipe method for a coupla may be well worth peace of mind

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    Re: Copper Fuel Pipe - what diameter.


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    Re: Copper Fuel Pipe - what diameter.

    Apologies down the middle of the thread is a piccie of some copper to 8mm rubber pipe adapters. These have multiple ridges on to stop the pipe blowing off.

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    Re: Copper Fuel Pipe - what diameter.

    A copper flare is fine, the pressure in a brake circuit will far exceed that of the fuel delivery pump (60psi)

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