165 to late MAF

[Bruce Plecan]

----- Original Message -----
From: gabe <gellett at earthlink.net>
Subject: Re: 165 to late MAF

For the work your going to do, why not just set up to a 1227730, and have a
much newer system??.  I'd really recommend that.  In the future the MAP
sensors are cheaper, and you can find them in the junkyards.
Grumpy


| On an '870 ECU for an '85 5.0 TPI, does the piggyback module for the MAF
do
| anything (other than burnoff) that I cannot do with relays myself (power
on and
| off the MAF).
|
| I guess what I am trying to ask is:  What, exactly, are the piggyback
module's
| functions?
|
| I am currently powering the MAF with a Bosch SPDT relay and sending the
MAF
| signal straight into the ECM, is there anything wrong with doing it this
way,
| other than I lose the automatic burnoff function?  I do not have the
piggyback
| module and cannot convert to my '165 ECU due to not having the correct
Memcal
| located yet.
|
| Gabe
|
| Mike Rolica wrote:
|
| > Only for the early 85-86 models.  Then they went to voltage on 87-1990.
Had
| > lots of trouble with the early freq mafs.  That is why BUA has a bit for
| > freq or analog.
| > Mike Rolica
| > Meridian Magnesium Products
| > Strathroy, Ont
| > Ext. 260
| >
| >         -----Original Message-----
| >         From:   Bruce Plecan [SMTP:nacelp at bright.net]
| >         Sent:   Saturday, November 27, 1999 8:35 PM
| >         To:     gmecm at efi332.eng.ohio-state.edu
| >         Subject:        Re: 165 to late MAF
| >
| >         Going by what I read in the ecmguy's HAC the 165 MAF is
Frequency.
| >         Starting at 069A (ref BUA), we have the Ld var for scaling LV8
Scale
| >         Factors,
| >         and just before that we have MAF frquency 34-150 Hz, sounds like
| > frquency to
| >         me.
| >         Grumpy
| >
| >         | Waaait a min, how are you getting around that the new GM MAF
is
| > frequency,
| >         | and the old is voltage? Build a translator box for freq to
volt?
| >         | At least with the Porsche 928 MAF it wouldn't need any
| > translation...
| >         | Maybe one of the code wizards can rewrite the code so it can
use a
| > freq
| >         MAF?
| >         | I'm awaiting this as I want to start modifing my 89 and one of
the
| > first
| >         | things that I want to upgrade is the entire air inlet tract
| > (Firebird).
| >         | Tom
| >         |
|