I would like to hear from people who have had a utec for a while and can tell me how they hold up to changes in temperature and in cases when a different octane gas is used like 91 92 and 93. I am not concerned with performance inconsistencies, but things like managing knock, fuel mixtures, boost spikes, changes in elevation and temperature ect. I want to know about the ability not to maintain optimal performance but to perform "well" under adverse or just different conditions.
Thanks.

Utec program 2.5b with closed boost control & boost gain control will give very precise boost control, unless something like your wastegate or boost control solonoid aren't working right.

this is also pointless

or I believe it's possible to set it to reduce timing a set amount and add fuel for certain temps. Although I havn't figured it out yet(for the lower temps) it is possible according to the manual.-James