MAP vs MAF, again

[Dave J. Andruczyk]

> I need a Map, not an MAP..
> I am lost.  MAF is a MASS AIR FLOW sensor.  usually a hot wire or 
> plate type?  MAP is a Manifold Air Pressure sensor?  What measures 
> Atmospheric pressure(in a boat its a barometer)?  How do I get 
> Speed -Density?  One or two sensors?


MAP = Manifold Absoulte Pressure sensor. 

I see and optimal system utilizing both sensors.   MAP is excellent at
showing relative load and MPG ( by vacuum), and MAF is excellent for
compensating for engine mods, (polished  heads, free flow exhaust, etc..)

dave