V-Maf Differences for Part #s

[Dave Zug]

well with no info contrary to that (that they are the same) I'll go with
that for mow but something tells me...


thanks.

Forgot about the burnoff wart. thats right.


----- Original Message -----
From: Gabe <gellett at earthlink.net>
To: <gmecm at diy-efi.org>
Sent: Saturday, January 29, 2000 9:49 PM
Subject: Re: V-Maf Differences for Part #s


> I have an (originally) '85 TPI in my truck.  I thought I was having MAF
troubles
> and got an '86 MAF from the salvage yard.  It seems to work/look the same.
I am
> now running an '165 instead of the '870 with the ARAP calibration.
>
> The '870 itself has no burnoff function, but it does have a "piggyback
module"
> that does conduct a burnoff to the MAF.  The 5 inputs/outputs are wired
and
> function the same between the MAF's.  I didn't realize that there was any
> difference at all.
>
> Is the '86 MAF the same as the '89?
>
> Dave Zug wrote:
>
> > I have seen a 85 MAF put onto an 89 '165 TPI system with no apparent ill
> > effects and was wondering just what the differences might be. the 89 may
be
> > higher quality components or a more enhanced range or something?  I know
the
> > 85 '870 used no burn off relay but when the 85 MAF is put on an 89
system
> > the burn off functions correctly and has not harmed it.  It led me to
ask
> > just what exactly are the changes between the early V-MAFS and the later
> > ones.  a curiosity thing - also it would be nice to know that if I see a
MAF
> > on an 85 '870 car I can snag it from a yard or parts car.
> >
> > anyone else?  anyone ever made a voltage-to-G/S graph from flow data for
ANY
> > MAF?
> >
> > > | There are differences in MAF part numbers between my 89 (voltage
type)
> > and
> > > | say an 85 (voltate type) MAF.
> > >
> > > Yep.
> > >
> > > | Can someone tell me what the differences may be, generally?
> > >
> > > Assuming your taking about your F-body, it is also a different ecm.
86-89
> > > take a 165.
> > > Bruce
> > >
> > > | Is it the curve? the range slightly? significantly??
> > > | no differences in the bore, and not the connector that I can tell.
> > > | thx.
> >
>
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