I just ran across this data on the 2nd gen RX7 mass airflow sensor.
Bosch wrote it up as part of the L jetronic injection system manual.
I suspect it is made by Denso under license and installed
in 1986 to 1991 RX7's. I don't think it is a computer.
I think it is similar to a 555 system. All hardware and no
software.

Perry Mick has been flying this system for years in his Long EZ
with hundreds of hours.

It is very reliable. He has tricked the ECU into thinking it is
still in  car. He has even installed an RX7 instrument panel
in the cockpit.

There are probably over 100,000
of these systems out there. They are real cheap I suspect.

Paul Lamar

Paul,
This may not be doable for Aviation and I have no doubt that someone will
tell me why, however all ideas should be explored if only to eliminate them
IMHO. Now some motorcycle carbs have floating slides whereby the density of
the incoming air varies the slide compared to the throttle position - for
altitude compensation. I can't remember exactly how this is accomplished by
lifting the slide with the incoming air. There is a sloped face which is
supposed to have a critical angle to accomplish this task. It may be there
is a calibrated spring that air density is pushing against.

This is the simplest solution air density adjustment I have heard about.
For your consideration.
George ( down under)