Allso, sometimes it doesent hurt to reread your own absorvations. I am reffering to the fact that on my Seat gasifier, the last 2 nozzles burned hotter thain the first. The fact is air bounces from the end of the nozzle pipe, causeing this effect. Same has been seen here and prooved later with a shopvac pushing air in.
You can see the right part is more oxidised. I will have to weld the last two tighter and drill the first two.