Those are flywheel figures hence the confusion.
There are no correction factors on the graph.....please ask for them to be printed out with the graph. You may have had a very high difference in intake temp hence giving the very unrealistic figure.
340lb.ft torque just doesn't happen, more like the tacho calibration being out which is quite evident from the graph.
Eisenmann's give 8-10 RWHP at best from our experience. Be interesting to see what the other vendors achieve.