MAP can be as accurate a MAF if set up correctly.

Chip is right, a MAF equipped car will adjust to changes such as cams
air filters, porting etc... (to a limit)

MAP sensors are used as they are cheaper to buy and install.

MOST cars that have MAF will have a MAP sensor aswell if turbo charged
such as the escort cossie small turbo.
(Some early scoobys and evo's dont have both and only have a MAF)

MAF sensors restrict airflow to the engine.
MAF sensors have an ultimate airflow/BHP limit due to these restrictions.

At the end of the day, either sensor will produce near identical results
if set up correctly but only directly control the cars fuelling 50% of the
time anyway due to transient changes in load.


My personal choice will be MAP every time for turbo cars !