205 Fueling
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Thread: 205 Fueling

  1. #1
    1000+ Posts Luca's Avatar
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    Default 205 Fueling

    205 owners as u know the fuel flows from the tank to the fuel can in a 205. Then it flows through the fuel rail and then through the fuel pressure reg..... after the fuel reg there's a fuel line that runs back towards the fire wall and disapears under it.....

    Where does it run too? back to the tank?

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    Last edited by Luca; 29th May 2004 at 05:42 PM.

  2. #2
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Luca
    205 owners as u know the fuel flows from the tank to the fuel can in a 205. Then it flows through the fuel rail and then through the fuel pressure reg..... after the fuel reg there's a fuel line that runs back towards the fire wall and disapears under it.....

    Where does it run too? back to the tank?
    It's the return line back to tank, at atmospheric pressure.

    '92 205 Mi16
    '90 Mi16x4

  3. #3
    1000+ Posts Luca's Avatar
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    Peter I've thought about it and I've gone down stairs and looked at it and it doesn't make sense....

    The fuel reg holds the fuel in the fuel rail until it reaches 3.5 bar (aftermarket fuel reg) and then the valve opens releasing it into that tube back to the tank. Wouldn't it be running consistantly at 3.5 bar after the fuel reg and not before?

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    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Luca
    Peter I've thought about it and I've gone down stairs and looked at it and it doesn't make sense....

    The fuel reg holds the fuel in the fuel rail until it reaches 3.5 bar (aftermarket fuel reg) and then the valve opens releasing it into that tube back to the tank. Wouldn't it be running consistantly at 3.5 bar after the fuel reg and not before?
    No, it's just like any other hydraulic circuit. Between the pump and the regulator it's 3.5 bar. Bewteen those two are the injectors. So there's always 3.5 Bar +/- manifold pressure at the injectors.

    '92 205 Mi16
    '90 Mi16x4

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    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by PeterT
    No, it's just like any other hydraulic circuit. Between the pump and the regulator it's 3.5 bar. Bewteen those two are the injectors. So there's always 3.5 Bar +/- manifold pressure at the injectors.

    very true

    pressure is only created by resistance and in this case it's the regulator

    after that there is a pressure drop in the line back to the tank

    to get really pedantic there would actually be a little bit of vaccuum after the regulator
    3 x '78 604 SL

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    1 x secret project

    1 x '98 406 STDT troop carrier and i don't care if it stinks, i don't sniff it's arse Death by wank tank

    1 x '99 406SV 5spd wagon, time to burn more fuel

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    WTD long range fuel tank for 605

  6. #6
    1000+ Posts Luca's Avatar
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    That's assuming the fuel pump is pumping fuel at 3.5 bar no?

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    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by Luca
    That's assuming the fuel pump is pumping fuel at 3.5 bar no?

    pumps don't create pressure they only create flow, it's resistance that creates pressure but in saying that the pump has to be able to create enough flow

    pumps ratings in hydraulic land are rated at flow

    fuel pumps on the other hand seem to be rated at pressure which is a bit misleading as they supply a flow
    3 x '78 604 SL

    1 x '98 306 GTi6

    1 x secret project

    1 x '98 406 STDT troop carrier and i don't care if it stinks, i don't sniff it's arse Death by wank tank

    1 x '99 406SV 5spd wagon, time to burn more fuel

    1 x 1994 605 SV3.0


    WTD long range fuel tank for 605

  8. #8
    1000+ Posts Luca's Avatar
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    Thanks guys.

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