Re: MAF use and calibration

["Bruce Plecan" <nacelp@bright.net>]

Reversion can happen about anytime, has alot to do with intake valve closing
timing.  Can be just off idle, or WOT but below peak torque, sometimes at
WOT.
Grumpy


> guess I shoulda read the later posts before saying the same thing ;-}
>
> In the '727 theres coolant temp linearization that uses 2 tables to
correct
> the sensor curve, hysteresis code there too.
>
> While you are adding code for MAF readings, add a bit to enable a
> "anti-reversion" filter for big cams ;-)  anti-reversion mode = during
high
> load, dont let MAF readings transition more rapidly than X per pass.
>
> MIME is sometimes forcefully implemented on the mail servers (not the
> list's, YOURS) , it will translate for you when high security is desired
by
> the server owner. I'm told this anyway...
>
>
>
> ----- Original Message -----
> From: Mike Rolica <97005620@lambton.on.ca>
> To: <gmecm@diy-efi.org>
> Sent: Thursday, June 15, 2000 10:33 PM
> Subject: RE: MAF use and calibration
>
>
> >
> >
> > -----Original Message-----
> > From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
> > Of NickG
> > Sent: Thursday, June 15, 2000 11:56 PM
> > To: mrolica@meridian-mag.com
> > Cc: GM ECM List
> > Subject: MAF use and calibration
> >
> >
> > >snip>
> > The '165 ECM is setup to use an 8-bit value for the MAF reading, whose
max
> > is 255gms/sec. To double this, you only need to add 1 bit, for 9 in
total,
> > not 16. Going to 16bits would increase the range by 256 (not 2).
> >
> >
> >  well that is a givenn:) but it is a little easier to go 16 bit as
opposed
> > to 9 bit.. he he
> >
> > but what would ya do with the extra bits :)   (i was thinking making the
> > table have finer resolution.. but you then run into the problem bruce
> > noted... the spikes and surges of the varying output of the maf....
> >
> >
> > > I'm working on that right now by adding a table like the ve on the 730
> >
> > Please let us know how it turns out. Inquiring minds want to know :)
> >
> > Nick
> >
> > ps. could you look into turning off the MIME encoding when posting to
the
> > list? Thanks :)
> >  umm the mime is off all plain text here.... i emailes orin and he said
> > every thing was fine and that it was some other thingy with the mail
> > server??  i dunno....
> >
> >
>
> --------------------------------------------------------------------------
> --
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo@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@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@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@lists.diy-efi.org