Ignition Mapping - Could do with an explanation

[Paulnobodyimportant]

Been using MTech and Ky-Tronik for a while now and both great products. I fully understand the theory and benefits of these boxes, but all I've done is dial in the recommended curve and then in one instance moved it to the next curve either up or down to get the best feel for the ride. In respect of the Ky-Tronik, these photo below shows typical curves.



However, Ky-Tronik now have a spread sheet where you can compare curves, see link below. Now I can play about with all the variables on this chart, but first I need to understand the cause and effect of changing these curves. Eden and others have mentioned mapping ignition, but what is it all based on to get your engine running sweet and safe.

Any info would be great for me and I bet many others.

https://drive.google.com/file/d/0ByAeFQ ... selJj/view