Frank_Cox wrote:yeah that....
for the cook chamber volume use the entire cook chamber volume.
the throat size is the opening between the CC and the FB.
drawing looks good! I would be interested to see how it performs. one thing to watch for is "Dead Air Volume". usually found when the air volume being moved is asked to make too many turns or changes in direction and an eddy is caused in the inside corner of a turn or after a throat. this forms a restriction and the volume of the air mass in the eddy is dead space with no changing air movement.