FUEGO Twin Webber Jetting
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  1. #1
    Fellow Frogger! AU-YT's Avatar
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    Default FUEGO Twin Webber Jetting

    Hi all
    any one out there have some info on FUEGO Twin Webber Jetting Webber sizes 40/45 , Chocke size mains airs idles etc I should mention stock cam and comp. I am also interested in any other info on tweeking for the engine
    Graeme

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  2. #2
    1000+ Posts edgedweller's Avatar
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    Default carbies

    Hey Graeme,

    seems no-one out here has boo to say about weber carbies, which is a pity because some-one else I know would really like to know what's up with them!

    Could some-one recommend a previous thread that this might have been covered in?

    Thanks ed ge

  3. #3
    1000+ Posts Wildebeest's Avatar
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    Default Fuego Twin Weber Jetting

    Quote Originally Posted by AU-YT
    Hi all
    any one out there have some info on FUEGO Twin Webber Jetting Webber sizes 40/45 , Chocke size mains airs idles etc I should mention stock cam and comp. I am also interested in any other info on tweeking for the engine
    Graeme
    Do I understand correctly that your query pertains to the Type DCOE carb?
    If so some of the posts have been referring to the common down draught type.
    Any DCOE advice taken should only be from those who have successfully been down that path.

  4. #4
    1000+ Posts alan moore's Avatar
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    Default

    With a stock cam and compression you are unlikely to
    get a huge advantage of the Webers. These following figures are an educated guess for a stock Fuego. This is tending toward more torque than topend.

    32-34 mm chokes
    4.5 aux venturi
    135 mains
    200 airs
    45-50 F8 idle
    F16 emulsions, but F15 and F9 would work. F2s too rich
    .35 accelerator pump jets
    around .5 accelerator pump back bleed
    1.75 needle valves 1.50s would be close to their limit but may work, particularly if fuel pressure is not regulated. Fuel pressure should be 2.5-3psi.

    Next question is what have you got in the carbs you have bought, and I could advise you further, as some of these parts are expensive.
    '56 Renault 750 (16TS Power)
    '62 Renault Dauphine Gordini
    '89 Renault Alpine GTA V6 Turbo
    '08 Renault Megane sedan

  5. #5
    Fellow Frogger! AU-YT's Avatar
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    Default Thanks Alan

    I at this stage have a par of old 40 DCOE's with vitually nothing in them.
    I was contemplating two options
    One get some from say a 2ltr Ford set up or
    two Convert the old webbers to throtle bodies and fit fuel injection.
    The second option is often the best from a tuning point of view as there are relitively few peolpe who can tune webbers these day's. Where as programable injection is common there I live with Haltec down the road.
    as this is some time off the injection is looming as the best option.

  6. #6
    1000+ Posts alan moore's Avatar
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    Default

    I have quite a few parts for DCOEs and would be willing to sell some off. Twin 40s will work OK on a Fuego. 2L Alfas only run 40s. Earlier ones had Webers, later Del Ortos. An old set off an Alfa would probably be a good start.

    Injection, ultimately would be better, but at more considerable cost. Webers well tuned and balanced work well, and you may be surprised how many people still have Webers on their old race cars. Find out who they use for tuning.
    '56 Renault 750 (16TS Power)
    '62 Renault Dauphine Gordini
    '89 Renault Alpine GTA V6 Turbo
    '08 Renault Megane sedan

  7. #7
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    Default

    I have fitted twin 40 DCOE Webers to my Fuego and here is the various jets etc I have played with and comments at the time. It is now satisfactory and pulls like a train.
    Carburettor Details

    Type Weber Sidedraught Dual Choke
    Engine 1995 cc Four Cylinder OH Cam Renault J6R
    Model Weber 40 DCOE 24 x 2
    Head worked & converted to unleaded
    4 Branch exhaust manifold

    Chokes 32
    Aux Vent 4.5
    Mains 120
    Airs 170
    Emulsion F16
    Idles 55F8
    Pump 45



    seems fine now for road use pulls well right through range

    Hope this is of help to you. Economy is satisfactory and engine is tractable in heavy traffic.


    JYD
    Last edited by JY Dog; 30th December 2004 at 10:56 AM. Reason: Clarity

  8. #8
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    Default

    When rebuilding, leave nothing to chance. If the jet is stamped 40 or whatever, don't trust it. Quite often people solder & drill to save a buck so often what you see is not what you get. Even when buying new jets, they must be measured as well.

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