Re: V-Maf Differences for Part #s

[Gabe <gellett@earthlink.net>]

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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