Dang, Dave..... I didn't know you remembered so much
about carbs ;-) Ya don't suppose idle vacuum is so
low it's opening the power valve, eh?
Ed
--- Dave Dahlgren <ddahlgren@snet.net> wrote:
> A little more info about the engine and carb size
> would be helpful also if
> there are power valves or not and what number they
> are. cam info would be a
> real plus along with compression etc. What is the
> idle vacuum?
> dave
>
> > -----Original Message-----
> > From: owner-land-speed@autox.team.net
> > [mailto:owner-land-speed@autox.team.net]On Behalf
> Of Richard Fox
> > Sent: Tuesday, September 20, 2005 3:07 PM
> > To: land-speed@autox.team.net
> > Subject: Re: Carb tuning
> >
> >
> > I don't know much about tuning carburetors, but
> when I ran one I
> > drilled the
> > primary throttle plates, so that I could close
> them up and not run on the
> > intermediate circuit. I didn't do anything to the
> secondarys. Rich Fox
> > ----- Original Message -----
> > From: "Scott Cowle" <SCowle@mentorcollege.edu>
> > To: <land-speed@autox.team.net>
> > Sent: Tuesday, September 20, 2005 05:16 AM
> > Subject: Carb tuning
> >
> >
> > > 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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