I shorten this pipe today, thank you Koen
I only started the engine on the coal gas 15 min, not egr, no H2O. I think my coal, or the ambient air, is a bit damp. The flaring of the gas was white and the color of the red oxidation zone (1000/1100 C, I think)
I hope to check the nozzle today
Yes a coal gas rebak, not completely finished. Problem of knives.
No secret for you my friends just project that does not finish anymore