Hi Kristijan, Got a little more information out of you latest post, The nozzle is actually the two copper projections connected with the ring of copper, correct? If this is the case, my concern is the distance from the end of the nozzle to the coiled copper gas grate. If your engine is pulling chargas really hard, it is possible the oxidation lobe may extend to far and not have enough oxidizing charcoal to convert the CO2 to CO. Test runs will confirm this, but it could be a problem. Make sure you are using small diameter charcoal. Something about the size of your little fingernail or smaller. There is not much room between your nozzles and the gas outlet so there is a real possibility of hot CO2 making its way past large pieces of charcoal and not getting reduced into CO.
I'll state again, do not be in a big hurry to hook up the engine exhaust, With the steam injection, you will need some higher heats and the exhaust gas may keep that from happening, Hey, that is FREE advice so it is only as good as it cost! or maybe less.
Gary in PA