Even with a discounted AFM new, and other expensive parts for the
aging waterboxer motor,  the Haltech( or other engine management
systm) sounds more feasable all the time.  Ebay has lots of them for
sale,new and used,  and if you can still do DOS on your computer, an
old F-9 or E6S unit will do just fine.  The windows-based systems are
a little more money, but have cool 3D graphics if that sort of thing
turns you on.

My Haltech(an older E6S) runs on a MAP sensor/Throttle Position
Sensor with air temp and coolant temp input.  It also allows you to
design your own spark advance curve.

  DM&FS

At 10:43 AM 3/5/2010, Loren Busch wrote:
>On Fri, Mar 5, 2010 at 8:17 AM, pdooley <psdooley@verizon.net> wrote:
>
> > Somebody should come up with a MAF interpolator for this vehicle.
> >
>
>I assume you are talking about what some have called a 'hot wire' setup
>rather than the moving vane.  At least two people or groups have
>experimented with that idea that I'm aware of.  And ran into some problems
>that are or would be difficult to get around, nonlinearities in making such
>work with the existing Vanagon engine control system. Both of the attempts
>that I'm aware of seem to have come to a halt, heard nothing for several
>years now.