Reply to "351c EFI Kit"

A couple of quick info points.

aplha n uses throttle position as the main determiner of fuel. Speed density substitutes Manifold pressure. The same ecm can be used but the maps look very much different. A map system can run with each RPM setting the same for the corresponding MAP values. Alpha n must have a map that is based on curves.

Alpha N can be made to run very well, but it requires multi dimentional maps. You need to have a 3 dimentional map based on Speed, TPS and Inlet air temp. You dont need inlet air temp in Mass air flow because the air density changes are reflected in a change in vacuum.

Coolant temp really only needs to be used for warmup since you need extra fuel when the combustion chamber is cold.

Yes, Ford ECUs are designed for MAF. Except for late 80s models.

One difficult thing to remember about alpha n is that it is very sensative to engine changes. Map will tollerate moderate changes with no adjustmente needed. MAF will tollerate a wide range of changes. Alpha N can make the engine run like crap as the rings and valves wear. Race cars dont have to worry about this since they are rebuild all the time and are often only tuned to run at high throttle settings and really dont run well at what you would call street driving. A little better than mechanical, but not much.