MAP signal dampening

[Swayze]

so  advance the timing at idle, and if necessary set idle conditions to run open loop. RPM vs. TPS ?(below threshold rpm(550-850))? Is this something thats already in the code or wold it need to be patched in?VSS?
byE
Mike
Swayze
mswayze at truswood.com
kswayze at bellsouth.net

----- Original Message ----- 
From: "Carl Summers" <InTech at writeme.com>
To: <gmecm at diy-efi.org>
Sent: Friday, March 10, 2000 9:31 PM
Subject: RE: MAP signal dampening


> Hi All,
>    On a closed loop setup altering the O2 gains will help and to stabilize
> rpm use the timing table.....If you put more timing at a higher KPA table
> than at the lower it drastically stabilizes big cams....also if it is real
> big...you will probably find it needs to be open loop at idle as lots of
> overlap doesn't like 14.7 AFR....hth's
> -Carl Summers
> 
> Click on this link below to see the easiest way to handle internet
> transactions.
> 
> https://secure.paypal.com/refer/pal=drsagan%40pacbell.net
> 
> -----Original Message-----
> From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf
> Of Ward
> Sent: Friday, March 10, 2000 5:06 PM
> To: gmecm at diy-efi.org
> Subject: Re: MAP signal dampening
> 
> 
> Bruce you absolutly correct. if you try to mechanicaly filter the MAP it
> will be wrong some where else. This is fixing a leaky fountan pen with a
> rubber glove.
> 
> Ward
> 
> 
> On Fri, 10 Mar 2000 15:07:12 -0500, gmecm at diy-efi.org wrote:
> 
> >  Remote mounting,and large lines can dampen the MAP signal, but that's
> >  usually exactly what you don't want to do.  I'd recommend looking in the
> >  code for filtering rates or such.
> >  Unless you want a delayed response to everything else, ie transistions.
> >    I've tried min cross section hoses with 1-2-3 orfices in them, large
> line
> >  (3/8") with restrictors, small tomato paste cans used a dampening
> volumes,
> >  I have never gotten very good results with any of it.
> >    There is no universal answer for this, as far as I know.
> >    Big cams have a lumpy idle, bigger cams have a lumpier idle, if that's
> >  what your talking about.  The dumber the ecm is at idle the less this is
> a
> >  problem.
> >    I after trying lots of answers, I perfer to use the oem gm small
> plastic
> >  hose (ie 1/16" ID), and mount it as close to source as possible.
> >    If you keep hitting the ASR (anti stall routine), and see the IAC jump
> all
> >  around, then try the different pintle route.
> >    Sometimes lots of advance helps (at idle).
> >  Grumpy
> >
> >  ----- Original Message -----
> >  From: Swayze <kswayze at bellsouth.net>
> >  To: <gmecm at diy-efi.org>
> >  Sent: Friday, March 10, 2000 2:31 PM
> >  Subject: MAP signal dampening
> >
> >
> >  > will remote mounting a map sensor (attached to manifold with vacuum
> hose)
> >  > dampen some of the idle fluctuations or average out the MAP signal?  If
> >  so,
> >  > what is the proper ID tubing?
> >  > byE
> >  > Mike
> >  > Swayze
> >  >
> >
> >
> ----------------------------------------------------------------------------
> >  To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> >  in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> >
> 
> 
> Ward
> 
> 
> 
> 
> 
> _______________________________________________________
> Get 100% FREE Internet Access powered by Excite
> Visit http://freeworld.excite.com
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 
> 

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org