Carb Question - NCRS Discussion Boards

Carb Question

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  • Michael G.
    Very Frequent User
    • March 2, 2008
    • 485

    Carb Question

    My 71 350/270 came to me with a freshly rebuilt Q-jet #17044226. Aside from being incorrect for my application, it seems to do the job for now until I aquire the correct unit. It does produce a single "hick-up" as the secondaries are activated. I have completely rebuilt the distributor and tuned the ignition system. No apparent vacuum leaks. Could this mis-matched carb be the culprit? Accelleration is good before and immediately after the hick-up. I am no wizard with the Q-jets so even the most elementary carb adjustment suggestions could be helpful. I'm also curious what the original application was for this carb. Happy Easter you all. Mike
  • Dick W.
    Former NCRS Director Region IV
    • June 30, 1985
    • 10483

    #2
    Re: Carb Question

    The secondaries are probably opening a tad too soon. You can tighten the spring that holds the secondaries slightly and this should go away
    Dick Whittington

    Comment

    • Edward J.
      Extremely Frequent Poster
      • September 15, 2008
      • 6940

      #3
      Re: Carb Question

      Mike- Dick Has You On The Right Track, The Spring Is On The Pass Side, The Spring Is Not Visable,the Adjustment Is Just Under The Air Horn Its A Very Small Allan Head Screw That Locks A Screw That Adjusts The Tension On The Spring, Dont Go Crazy Tightning This Screw, The Spring Is Very Small, Maybe A 1/4 To 1/2 Turn Should Do. Tighten The Spring Will Slow The Opening Of The Butterfly For The Secondarys.
      I Beleive The Carb No. From The Factory Should Be A 7041202 For Automatic And 7041203 For 4 Spd. Hope This Make Since.
      New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.

      Comment

      • Michael G.
        Very Frequent User
        • March 2, 2008
        • 485

        #4
        Re: Carb Question

        Dick and Edward. Thanks for the direction. Will tweek it in the morning and post my progess. Thanks again, Mike.

        Comment

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