Barometric pressure

[Bruce]

Anyone have any pictures of this plumbing?.
Bruce




----- Original Message -----
From: "Bob Wooten" <r71chevy at earthlink.net>
To: <diy_efi at diy-efi.org>
Sent: Saturday, September 15, 2001 11:07 AM
Subject: RE: Barometric pressure


> Yup, I see the same thing.  the faster you go the "harder" the air pushes
> into the intake.  My ram air setup does the same thing.  another
interesting
> item (although a bit off topic) is to watch air temp go down @ the same
> time.
>
> BW
>
> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Bob Tom
> Sent: Friday, September 14, 2001 8:34 PM
> To: diy_efi at diy-efi.org
> Subject: Re: Barometric pressure
>
>
> At 10:09 AM 9/14/00 -0400, you wrote:
> >There are several strategies.  Some take a glance at startup,
> >then others at 3/4 throttle, do a review of it  The earlier ones use
> >a full time baro sensor.  (the above, reference GM)   Bruce
>
> I recorded a run at the Mopar Nats in Columbus, OH on my OTC scanner.
> Prior to launch, the baro sensor readout displayed 29.1" Hg.  When the
> Dak hit 25 mph, the baro reading was 29.6" and, at 39 mph, it showed
> 30.3".  For the remainder of the 1/4-mile run, the baro. readings bounced
> back and forth between 30.3 and 30.5  I have recorded similar patterns at
my
> local track.
>
> I know that the Dak's pcm stores the baro. reading at key on but have not,
> to date, been able to find much details on how it is used in the engine's
> management strategy.
>
> I run with a cold/ram air box with two 4" air ducts and think that this
may
> be a factor for the pattern that I'm seeing.
>
> Bob Tom     Burlington, Ont., Canada
> '97 Dakota Sport, 4x2, CC, Flame red, 5.2L, auto., 3.92SG
>
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