stored in the stock ecu, are there a number of fuel maps for different conditions? or is there only one that is altered based on changing conditions?

For instance, If I am at 50% throttle, does the computer look at the fuel map's designated WOT fuel setting, and divide it by two?

I've heard people say " you have to tune the WOT and the partial throttle maps..." does that mean there are two distint maps... you get the question.

 

That is the small cam fuel map for a modified P28 program. RPM is on the Y axis, and is increasing as it goes down, and fuel % is on the X axis, increasing as it goes to the right.

 

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thanks for the link, I read most of the site, and to my understanding:

At under 80% throttle, the computer calculates fuel based on the sensor inputs.

At over 80% throttle, the computer uses a "look up table" to calculate fuel.

But a question I still have is, how do tuners tune for under 80% throttle? Is there a fuel map associated w/ under 80% throttle too?