DA and tuning at a different track?
I would expect to see the DA at best around 2800 in Vegas in March....but usually in the low 3000...
the air is dry but it is the Barometric Pressure or lack of...that kills the DA here....
my car ran 3 tenths faster in Sacto then in Vegas.......
I usually run about 2 jet sizes front and back leaner in Vegas then Sea level..
Just bring us some of that good Sacto air