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Thread: Stromberg carburettor main jet size.

  1. #1
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    Stromberg carburettor main jet size.

    Seeking assistance on setting up my Stromberg carburettor main jet, my car is a Series 2A 2.25 came with a Holden carburettor and I have set it up as I would for a Holden Grey motor. I haven’t changed the jets just cleaned it and set float level, the engine is running very rich so I was wondering if anyone has installed a stromberg to their car and what jets were installed. Or would I be better fitting an adjustable main jet.

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    Quote Originally Posted by Gippslander View Post
    Seeking assistance on setting up my Stromberg carburettor main jet, my car is a Series 2A 2.25 came with a Holden carburettor and I have set it up as I would for a Holden Grey motor. I haven’t changed the jets just cleaned it and set float level, the engine is running very rich so I was wondering if anyone has installed a stromberg to their car and what jets were installed. Or would I be better fitting an adjustable main jet.
    Interesting. Holden Greys are around the same displacement as the Series, one a bit smaller and one a bit larger. I would have thought that a similar jet size would be fine.

    I don't remember; is the jet size marked on the jet? I have a Stromberg here from my SIII. If all else fails I could take it apart for a look. I was going to put a kit through it at some stage anyway. It's not high on my list but I'd do it if it helps.

    Very long time since I looked inside a Stromberg.
    ​JayTee

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  3. #3
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    PS. Not meaning to insult you, but the float level is correct?
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

  4. #4
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    It is not unknown for unskilled tightwads to drill out jets when they think they are too small.
    Suggest maybe a new standard main jet so you know a baseline.
    Regards PhilipA

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    Quote Originally Posted by PhilipA View Post
    It is not unknown for unskilled tightwads to drill out jets when they think they are too small.
    Suggest maybe a new standard main jet so you know a baseline.
    Regards PhilipA
    Bought a FIAT with twin downdraught Webers like that once. Jets were like drains, and used fuel at the same rate.
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

  6. #6
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    My Series I has a Holden carby but it's fitted with an adjustable main jet.
    It does run rich but that's a legacy from the father-in-law setting it up when we drove to the 60th. He was worried about burning out exhaust valves !

    Stromberg Adjustable Main Jet - Hume Performance


    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '58 Series II (sold)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

  7. #7
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    Quote Originally Posted by gromit View Post
    He was worried about burning out exhaust valves !


    Colin
    As you do.. Have to give it a de-coke instead!
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

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