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Thread: MG TD idle speed?

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    Yoda NutmegCT's Avatar
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    MG TD idle speed?

    I've looked through my workshop manual and owner's manual. Can't find the speed to adjust the carbs for warm idle.

    Other than "lower the idle speed until the dynamo light begins to flicker on", does anyone know what speed was expected when new?

    Thanks.
    Tom M.
    Mac & Phyllis Take a Trip: http://nutmegflyer.com/trip-details-daily-updates/
    History: 1976 MGB, 1959 Triumph TR3A, 1960 Mercedes-Benz 190b, 1958 Rambler American.
    Current: 1953 MG TD27318.

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    Moderator Mickey Richaud's Avatar
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    Re: MG TD idle speed?

    Fairly low, as I recall - 500-600 rpm maybe.
    "24 hours a day; 24 beers in a case. Coincidence? I think not." (H.L. Mencken)

    Mickey Richaud
    '73 MGB, '69 MGB GT/V6, Victor TF
    ------------------------------------------------------------

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    Great Pumpkin DrEntropy's Avatar
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    Re: MG TD idle speed?



    That's why they call it "tickover".
    '64 MGB, '67 Lotus Elan S-3 DHC,'69 Lotus Elan +2
    '78 Alfa Romeo Spider-undergoing surgery: O=\*/=O
    '84 300D Turbo-"Diesela"-Now my Daily: Oo|≣|oO
    '02 Toyota Camry- SWMBO's 'new-to-her' Daily. <sigh>
    Chaos & Mayhem PTY, LTD..C.I.O. & Floor Sweepervisor

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    Yoda PAUL161's Avatar
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    Re: MG TD idle speed?

    Correction, Mine is set at 900 rpm, not 850, it will idle much slower but I like it at 900, my generator comes in at 1000, could re set it but it's fine. When all works well, I leave it alone. My plugs are color tuned and all are registering the same color. PJ

    Made a mistake sorry, my idle is set at 900 rpms, just checked.
    Last edited by PAUL161; 12-07-2017 at 09:43 AM.

    REMEMBER, NEVER FORGET!
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    Yoda NutmegCT's Avatar
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    Re: MG TD idle speed?

    Thanks gents. Here's what I just found in the 1986 edition of the New England T Register's "T Series Handbook" (articles from The Sacred Octagon):

    p. 128 Common Problems. "You may find it impossible to show the idling speed down to the recommended 700-800 rpm range."

    TM
    Mac & Phyllis Take a Trip: http://nutmegflyer.com/trip-details-daily-updates/
    History: 1976 MGB, 1959 Triumph TR3A, 1960 Mercedes-Benz 190b, 1958 Rambler American.
    Current: 1953 MG TD27318.

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    Jedi Knight
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    Re: MG TD idle speed?

    As I told you in my article, it may change with the temperature outside - or it may not. 850 sounds good - if it will idle at that.

  7. #7
    Moderator Mickey Richaud's Avatar
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    Re: MG TD idle speed?

    Tom -

    Check here; scroll down to "Carburetion": http://buggods.com/service/1952-mg-td/

    Interestingly, some other sites don't have any criteria at all for idle speed...
    "24 hours a day; 24 beers in a case. Coincidence? I think not." (H.L. Mencken)

    Mickey Richaud
    '73 MGB, '69 MGB GT/V6, Victor TF
    ------------------------------------------------------------

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    Yoda NutmegCT's Avatar
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    Re: MG TD idle speed?

    Thanks Mickey. Never knew of BugGods before. Also interesting, he refers to the TD having one inch carbs, but most references say 1 1/4" and 1 1/2".

    Ask three TD guys a question and get six answers?
    Mac & Phyllis Take a Trip: http://nutmegflyer.com/trip-details-daily-updates/
    History: 1976 MGB, 1959 Triumph TR3A, 1960 Mercedes-Benz 190b, 1958 Rambler American.
    Current: 1953 MG TD27318.

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    Moderator Mickey Richaud's Avatar
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    Re: MG TD idle speed?

    I've heard/seen the 500-600 rpm reference before, but a brief internet search didn't turn up much. Even the online shop manual is silent on an rpm value. ( http://www.ttalk.info/MG-TD-TF-WM.pdf ) Guess it's whatever floats your boat. I would think best practice would be about as low as you could get it and still have the generator charging.
    "24 hours a day; 24 beers in a case. Coincidence? I think not." (H.L. Mencken)

    Mickey Richaud
    '73 MGB, '69 MGB GT/V6, Victor TF
    ------------------------------------------------------------

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    Great Pumpkin DrEntropy's Avatar
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    Re: MG TD idle speed?

    Or the gen light flickering.
    '64 MGB, '67 Lotus Elan S-3 DHC,'69 Lotus Elan +2
    '78 Alfa Romeo Spider-undergoing surgery: O=\*/=O
    '84 300D Turbo-"Diesela"-Now my Daily: Oo|≣|oO
    '02 Toyota Camry- SWMBO's 'new-to-her' Daily. <sigh>
    Chaos & Mayhem PTY, LTD..C.I.O. & Floor Sweepervisor

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    Yoda NutmegCT's Avatar
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    Re: MG TD idle speed?

    Thanks gents. I'll have some time to play with the idle on Saturday. Six inches of snow in the forecast.

    Doc ... don't say a word ...
    Mac & Phyllis Take a Trip: http://nutmegflyer.com/trip-details-daily-updates/
    History: 1976 MGB, 1959 Triumph TR3A, 1960 Mercedes-Benz 190b, 1958 Rambler American.
    Current: 1953 MG TD27318.

  12. #12
    Great Pumpkin DrEntropy's Avatar
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    Re: MG TD idle speed?



    meh. I remember "snow".

    Actually, I'll be in Miami tomorrow.

    It's gonna rain.

    Temperature is forecast to be a chilly 77* F as the high, will dip below 50* as a low.

    I'll be miserable as a result, so take heart.
    '64 MGB, '67 Lotus Elan S-3 DHC,'69 Lotus Elan +2
    '78 Alfa Romeo Spider-undergoing surgery: O=\*/=O
    '84 300D Turbo-"Diesela"-Now my Daily: Oo|≣|oO
    '02 Toyota Camry- SWMBO's 'new-to-her' Daily. <sigh>
    Chaos & Mayhem PTY, LTD..C.I.O. & Floor Sweepervisor

  13. #13
    Jedi Knight
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    Re: MG TD idle speed?

    I never heard of a 1" SU on a TD. 1 1/4" for the regular TD, 1 1/2" on the Mk. II.

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