not only that, but your map may only be able to have a value in each site between 0 and 255.
even at idle, you need to open the injectors a certain duration, and if you have a minimum on time set to zero and you then need the minimum amount in the map table to be, for example, 20, then you only have a resolution of 235 left to play with.
if you set the minimum on time to be the equivalent of 10, then you have 245 to play with for the rest of the sites.
make sense?