California carb

Discussion in 'The Venerable Q-Jet' started by jhonjhon, Apr 23, 2018.

  1. jhonjhon

    jhonjhon Well-Known Member

    I just pulled the carb off the 71 455 I bought not long ago. The numbers are
    7041540 MF 0771
    I believe this is a California carb
    The questions are, is this worth rebuilding?
    What is the difference between a California and the rest of the carbs
    When I took it off, there were 2 metel screens that looked like acorns that went into the intake, what was their purpose?
    Will it run better with a non Cali carb

    Thanks for any help, john
     
  2. BYoung

    BYoung Stage me

    The book I have (Guide to Buick GS by Steven Dove) shows it as a 71 455 carb for auto trans. There is no reference to it being a California carb.
     
  3. flynbuick

    flynbuick Guest

    Usually the Cal carbs use the Number "9".
     
  4. carmantx

    carmantx Never Surrender

    Correct, it isn't the California carb. It is the 71 Buick 455 Quadrajet and is a great carb to build. It is 800 cfm.

    As far as the metal screens, that was probably an old gasket piece that was sold as a horsepower gain, or fuel economy, or whatever. It can be tossed away.
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    From the 1971 Buick Chassis Manual.

    1971BuickQJet.jpg
     
  6. jhonjhon

    jhonjhon Well-Known Member

    Thats great to know ill post pics of the metal screens later. Meybe it was a "vornado" from the 70's lolol. Thank you very much eveyone
     
  7. jhonjhon

    jhonjhon Well-Known Member

    Here it is
     

    Attached Files:

  8. shiftbyear

    shiftbyear Well-Known Member

    could you post some more pictures of the screen, I've never seen that before, could help atomization or not, very cool
     
  9. Bigpig455

    Bigpig455 Fastest of the slow....

    Does anyone know why Rochester switched from the 240 build configuration to the 540 for that one year only? It's like they subbed a traditionally CA carb for the entire country that year. Something to do with the strike? Has anyone ever seen a 7041240?
     
  10. carmantx

    carmantx Never Surrender

    They used 1242 for stage 1, 1243 for 455 manual and 1245 for 350 manual in 71. All others were 1540, 1544. There wasn’t any 1240 or 1244’s produced according to my records.
     
    techg8 likes this.
  11. techg8

    techg8 The BS GS

    Agreed. Ive never seen otherwise.
     
  12. jhonjhon

    jhonjhon Well-Known Member

    I'll try to post them tonight . I thought I read that the 5 in the code meant Cali carb and the then I took it off and saw the screens, I thought it was part of the cali carb . Wrong both times
     
  13. jhonjhon

    jhonjhon Well-Known Member

    More pics 20180425_092858_001.jpg 20180425_092850.jpg 20180425_092841.jpg
     
  14. techg8

    techg8 The BS GS

    that's the first time ive seen the primary screens like that. Ive seen other gaskets with different versions of that idea, but not that exact one.
     
  15. HotRodRivi

    HotRodRivi Tomahawks sighted overseas

    Maby they are ment to be wing nut catchers.
     
    techg8 likes this.

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