Mk2 lift pump and ethanol in fuel............................

Discussion in 'Carburettor' started by Jon Olds, Sep 11, 2021.

  1. Jon Olds Forum Junkie

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    Well, I have decided to try and minimise the affects of E10 in the vehicles I have 'lying around' . These
    are mostly tuned cars and bikes used for sport.

    So far, so good. An exercise of draining systems ethanol on carb fitting.jpg

    Get to the mk2 Golf Rally car and find the lift pump is u/s again.

    Its had two already, in the 3 years since I built it.

    Would love to run without it, but I need it to fill the under bonnet swirl pot, before being pumped onward at LP to the Webers.

    So, my question to you guys (experts) is where to buy a mk2 gti lift pump that wont fail after 2 hors running and 3 months standing?

    Also, I kind of expected some corrosion internally, but take a look at the piccy, this E5/E10 stuff is horrendous

    Thanks
    Jon
     
  2. Tristan Paid Member Paid Member

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    The boating people have been using fuel stabiliser for years, I wonder would that help?
     
  3. Jon Olds Forum Junkie

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    Thanks Tristan.
    The scope of the issue is only evident to me now, having stripped a pair of DCOE's.
    In summary;
    Banjo's into carb, corrosion,
    Inlet filters, 1/2 blocked with 'white stuff'
    Float bowls, looked clean, had 1/2 egg cup full of water in, when tipped upside down
    Obvious corrosion on closer inspection
    Pump jets, crap in
    Main venturi, Aux, OK
    Main float chamber, looked ok, but flooded with water and associated crap.
    Hidden, so more scary when tipped upside down
    Car ran 'ok', but obviously at major risk of running like a pig, very soon.
    Solution, no E anything
    Whatever it takes, avoid ethanol
    Jon
     
  4. Tristan Paid Member Paid Member

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    Race fuel so.?
     
  5. Tristan Paid Member Paid Member

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  6. Jon Olds Forum Junkie

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    Race fuel, avoided the stuff for years, I'm too tight.
    And 'pump fuel' specified, so that's what i've used.
    Now? Esso Synergy 99 is apparently as near zero as available. But that's only tinternet hearsay.
    I'm thinking some sort of dual fuel system so I can run the blighters round my gaff
    and onto trailers etc
    Jon
     
  7. H8V

    h8v Forum Member

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    Simon Peter Dodgson likes this.
  8. rubjonny

    rubjonny Administrator Staff Member Admin

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    I'm sure you could source some kind of aftermarket inline fuel pump which is E safe you can mod to mount to the lifter assembly? its literally held on with 2 rubber bands and the fuel hose from the factory so anything you can think of will be equivalent :lol:
     
  9. KeithMac Forum Junkie

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    I fitted an old Mitsubishi GTO fuel pump in my Mk2 lift pump hanger.

    So a Walbro 255 or similar should fit with a bit of fiddling.

    My be a bit overkill though for a lift pump!.

    I bough some Aspen 4 for the GTO, £80 for 25 litres but pure Alkylate so 3+ year life and if it does evaporate it leaves no residue.. Will be doing the Golf tomorrow as they don't move much..

    I work on knackered fuel systems just about daily at work so £80 well spent to not deal with them at home..

    20210822_160721.jpg
     

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