If only we could borrow your gas analyzer, Koen…
The chart I was talking about was the one i referenced in an earlier post, Nozzles for Charcoal gasifiers, part 2 - #252 by oregoncarl
Which now that I look at it, and crunch some numbers, seems to be giving a totally different picutre than the table that is talking about the 3.2mm nozzle! I looked for the text of that book, but the only place i found it wanted me to sign up. I think it is safe to say that 1300C temperatures at the nozzle are not required to make acceptable gas, although I am now starting to suspect that I do not in fact really know enough to prove it 