Sea Level vs Altitude Tuning

[soutthpaw]

In celerbration of my 200th post, I decided to start another thread

being that I am at 6000 ft and that there are obvious differences between Flatlander and Mountain Man tuning, I would like to get more input on this subject...

seems to play a role in Fueling and injection timing as there even separate settings for sea level and altitude in the programming... even for WOT shifting...

The Turbo in general is supposed to offset the effects of altitude found in naturally aspirated engine. So I am wondering why the altitude parameters are needed...
Oh, and at what elevation does the altitude parameter start to function? is that adjustable?????

For Jack I think the parameters would be even more significant for the Gassers being they are naturally aspirated