Density Altitude and how it affects this kind of performance is something that hasn't even crossed the minds of those posting about lack of performance here.
I live in Tucson and won't even bother running mine at that track, specially under warm conditions.
When I moved here from SoCal, I had a high 12 second Ford F-150 Lightning PU that dyno'd 400 rwhp. I took it out to SIR on a nice warm summer night to have some fun and it ran 14 flat. Less than impressive to say the least.
My conclusion was... why bother.
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