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Carb Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 83bowtyblazer, Nov 28, 2001.

  1. 83bowtyblazer

    83bowtyblazer 1/2 ton status

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    Location:
    Ft. Dix, NJ
    This is just a gee whiz question. At what RPM's do the 4 barrels open up on a Q-Jet?? Just wondering.

    Ryan

    Never knock on DEATH's door. Ring the bell and run...he hates that!!!!
     
  2. Blazer79

    Blazer79 1/2 ton status

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    Location:
    Guatemala, Central America
    It's not RPM exactly. The secondary valves start opening when the primaries are about 60% open, and they both reach 100% open at the same time. Since the the Q-jet has vacuum operated secondary valves, the top valves open and close depending on the vacuum your engine generates.

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