I'd be thinking he is running manifold pressure (gauge) as load rather than absolute pressure. He mentioned all the values are the same above 220 kPa and I would have thought a motor like this would have been tuned higher than 1.2 bar.
Out of curiosity, does the M800(non pnp) use the knock sensor at all? It would be neat to setup some kind of active knock control similar to the stock
ECU.
Edit: Just looked at Motec
ECU manager and it doesn't look like manifold gauge pressure is available as load, well not on the old version I have anyway. I know the ViPec software allows for gauge pressure (i.e. -100 to 150 kPa(g)), but it looks like Motec only has absolute pressure.