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My truck is much slower, but in my experience with the same set-up during a season racing at RMR, Bandimere, Woodburn (true sea level), and Firebird the ET was very close. This was back when running fuel only and 90-100 psi of boost. The MPH was higher at the high elevation tracks (less air to push a brick through) but the ET was similar when the 60" was comparable. I can see spooling affecting 60' at the high D/A tracks which will affect ET.
I have also raced a supercharged gas car and N/A gas cars at a few of these same tracks and picked up .3-.4 between 5k D/A and 1k D/A tracks. My opinion is the high boost makes up for the thin air if the set-up is working well. Just my .02 of experience.
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