Great pics and a great place for sure!! I can only guess how much fun you had!! I wish a place like that close to home.
The first pic (turn left) looks so enticing as a rally corner, I can imagine a hatchback drifting through the corner, kicking up massive amounts of dirt.
And like most, I'm also surprised you "only" got to 130. My guess would be that it's a bit of a combination of altitude (though this is a turbo engine, which makes it somewhat insensitive to altitude, but there must be some loss), increased rolling resistance and maybe the desert heat (unless you made your runs only in the morning, when it should be cool enough).