That article makes me laugh everytime someone brings up making 400hp with a stock headed 340 and a XE268H.
Had real world experience with an engine that was tested at westech then another shop about 2 weeks later. Numbers were not close to each other. The car ran almost spot on to the second shops lower numbers for MPH once it got sorted out a little.
I think the set up at westech is closer to reality now. You can make any software spit out numbers if you know what to tweak in the code/tables. A cheap humidifier can do wonders mucking up the weather stations readings for making great air seem like garbage. I did that to prove a point once or twice. LOL