308 carbs original components sizes | FerrariChat

308 carbs original components sizes

Discussion in '308/328' started by Garofanorosso, Apr 17, 2018.

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  1. Garofanorosso

    Garofanorosso Rookie

    Aug 7, 2009
    2
    #1 Garofanorosso, Apr 17, 2018
    Hi there!

    Could someone inform the original measurements of the 308, idle and main jet carburetors, etc ? My car is good in high rotation but very weak in idle speed.
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,134
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Apr 17, 2018
    The 308 carb internal components varied with year and version. The OM for a given year/version gives the stock specifications (but there was obviously some "learning" along the way). If you search on something like "emulsion tubes" (and investigate those) that should get you a lot of previous discussion.
     
  3. derekw

    derekw Formula 3
    Silver Subscribed

    Sep 7, 2010
    1,520
    London, UK
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    Derek W
    #3 derekw, Apr 17, 2018
    As Steve said, your year and version will affect the correct jetting. What cams do you have and have you done a compression test? It might be weak compression or your ignition timing and not your carbs. If you test your exhaust gas and/or look at your plugs it will give a clue.
     
  4. david bentley

    david bentley Karting

    Jan 2, 2004
    182
    Saint Louis Mo US
    Full Name:
    David bentley
    #4 david bentley, Apr 17, 2018
    I have read that most carb issues turn out to be ignition related....and most ignition issues turn out to be carb related!
     
    tomberlin and VA_Alfa like this.

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