MK3pizzadriver;1472419 said:
Other way around. The n/a has a mechanical AirFlow Meter with a sensor 'door' that opens more and more as incoming airflow increases, hence the title 'meter'. The turbo MAF has no moving parts, just a sensor, hence the name, Mass AirFlow Sensor.
Semantics pretty much though. Parts places use the terms interchangeably a lot.
Found this searching "MAF vs. AFM"
*Snip*
Turbos use AFM's It does not measure mass flow, it measures parameters that when combined with information from the TCCS can calculate mass air flow.
The door style are also AFM's just a different type.
MAF's use any type of device that alone will tell you the exact amount of air flowing threw the given tube, Most popular bieng a hotwire (as your article said)
For instance, An MK3 (turbo or non turbo) AFM will only give you air speed and temperature. This information combined with RPM and displacement or VE of the engine will determine the actual mass airflow.
A Corvette MAF sensor will output a signal that is a direct measure of mass airflow in Grams/second.
CFM does not equal mass airflow, mass airflow is measured in grams/second or lbs/minuite. There needs to be mass to determine density/pressure.
The turbo AFM is a Kármán vortex AFM, The Non turbo is a trap door AFM.
Also the TSRM refers to them as AFM's so thats just another reason. :biglaugh: