165 to late MAF

[Mike Rolica]

Umm on 165, the memcal comes with the prom.  You can use pretty well and 305
tpi 1 for a conversion.  A prom here is asround $40-50can from gm.  Which is
about 25-35 american.
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	gabe [SMTP:gellett at earthlink.net]
	Sent:	Monday, November 29, 1999 11:40 AM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: 165 to late MAF

	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
	>         |