here is two dyno graphs for my car one in normal mode one is shoot out mode.
maybe a few of the dyno owners can come in and add some technical comments.
I understand that the xr6t thread was a different shoot out mode config so dont worry about that comparing my results against it.
here is one of mine same dyno same day same operator did this specifically to measure what the difference was in shootout mode
(anyway HP = (((MPH / 234)^3) * Weight):s6: