What model (list #) carb is it? Are you sure those
aren't mixture screws on the 4 corners?
Ed
--- Scott Cowle <SCowle@mentorcollege.edu> wrote:
> Quick question-I have a holley double pumper, with
> idle mixture screws at all four corners. To get the
> carb to idle properly and enrichen properly I have
> had to increase the opening on the secondaries
> significantly so the primaries can remain closed
> enough so those idle mixture screws are responsive
> but also so gas doesn't come out in gobs from the
> venturi tubes at about 2000 rpm.But in this
> configuration it seems to me that the secondary side
> is getting into the high speed circuit because
> those idle screws are no longer functioning.In order
> to close up the secondary throttles I assume people
> will drill holes in those throttle plates. But if
> you do this to increase air flow in the secondaries
> at idle will it help raise idle speed too, because
> if I close up the secondaries so as tro get idle
> mixture screw response on the secondary side it
> idles too low.I'm new to Holley carbs so any help is
> appreciated.
> Scott
>
>
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