are the any multi-tune programs?
Charlie
however, due to the GM design, of flash only, you can't switch on the fly. But as stated a good tuner can retard timing when on the spray.
Ryan
For example, you can have it switch to an advanced timing & fuel map for a race fuel tune, toggled by a switch on the dash.
Or you can have it change to a retarded ignition map based on it's own NOS-triggering, so whenever the NOS circuit is enabled, you're running on an alternate ignition or fuel map (or both). However the NOS circuit also has an option to add fuel without requiring the use of the alternate maps, also.
You can also save different tunes on "chips." These are the Motorola computers, costing about $12 apiece, that you can have multiple tunes burnt on and just swap chips quickly for different tunes.


