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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