Me ? 
the timing table (or spark) does get modified & has a certain upper & lower limits, but it can only go so far.
Example:
Stock spark map might have a zero point for 94 ron and will adapt up or down maybe 12 degrees of pull or advance (there is more to it than just fuel itself).
If you change the zero point up (in this case make the central point for 98 ron) then you will still have maybe 12 degrees of adjustment either way.
There are limits to these tables, and also the sensor inputs that control them as well. - this is a very rough, basic explanation, there are many intertwined factors & other engine control tables that intertwine with the spark tables. Some ECU's will have 8 to 12 individual spark tables internally as well.

the timing table (or spark) does get modified & has a certain upper & lower limits, but it can only go so far.
Example:
Stock spark map might have a zero point for 94 ron and will adapt up or down maybe 12 degrees of pull or advance (there is more to it than just fuel itself).
If you change the zero point up (in this case make the central point for 98 ron) then you will still have maybe 12 degrees of adjustment either way.
There are limits to these tables, and also the sensor inputs that control them as well. - this is a very rough, basic explanation, there are many intertwined factors & other engine control tables that intertwine with the spark tables. Some ECU's will have 8 to 12 individual spark tables internally as well.
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