Why MAF/AFM?

[anonymous-user]

Just something that I've wondered for a while as I plan to ditch mine... Why do most manufacturers seem to use MAF or AFM sensors as input to the ECU rather than a MAP sensor? Talking to a friend who used to work on the development of the early Rover MEMS ECUs, he seems to think it was just a damn good sales pitch by Bosch to sell more kit.

[anonymous-user]

Thanks for that guys. I guess that the main point is that a MAP just allows you to make an estimation of the airflow rather than directly measuring it with a MAF/AFM.