I am not 100% sure about the temps, i knew by researching on the net that the thermometer on he grill is worthless, it was kinda a spur of the moment idea to smoke some ribs, so i went to the super market and got everything i needed. I looked for an oven thermometer and didnt see once, but i did find a fryer thermometer abd thought "hell, this should work" when i got home i noticed the fine print "not for use in ovens" but honestly i was too lazy to go back out and get a good thermometer. I jyst usedthe fryer thermometer in short burst. I would lay it onthe grate for 5 minutes wih the cooking chamber closed and hen take it out. According to it, my temps were usaully between 215-225°f. I had the exuast vent wide open for the whole smoke, and the intake vent was at about 25% open. I should also bring up the fact that i dont know how old the hickory wood chunks were, knowing my ead, they probaly sat in his garage for a few years before he remembered ge had them, would old wood possibly be my problem? And next time i think i will try laying the chunks next to the coals, i just tossed tthem ontop of tthe coals for this last smoke