Scott,
It effects it at idle at least. We have a vacuum standard at the circle
track for checking factory stock camshafts. They must idle at a minimum of
16" at 900 RPM. The folks at holley and the folks who build the TAG weather
stations have both said the higher the barometric pressure, the higher the
idle vacuum. Makes sense. They also said the idle vacuum drops about 1" for
each 1000 ft. of altitude as a rule of thumb.
That's all I know about it.
Howard
----- Original Message -----
From: "Scott Cowle" <scowle@mentorcollege.edu>
To: <land-speed@autox.team.net>
Sent: Friday, July 20, 2001 9:44 AM
Subject: barometric pressure
> We all know that the type of intake manifold affects the vaccuum signal
> that the carburetor receives. But does the barometric pressure outside the
> carburetor affect that signal, even indirectly? I'm asking this because I
> just put a new carb on my car and I'm dialing it in and I'm curious about
> what affects fuel flow from a carburetor.
> Scott
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