Air/ fuel tuning

You mean use a 5 gas on the dyno???
yes. Exactly. a 4 or 5 gas on the dyno.
The main reason I'm aware its doable was that Shrinker and some other guys discussed ways to do it on Speedtalk a few years back. So I know he's not the only guy whose done it.

Mark Whitner has an excellent video on YouTube showing how the PV does NOT open at idle. I put a link to it in this post but I don't know how.
Does this work?