You'll hear a thousand different answers but it comes down to AIR....Top vent stays open all the way and the intakes need open all the way for the most heat. I'm a fan for more intakes than less because you can always close what you don't need.
I'd have a total of at least 4 "'s of intake for super high heat cooks of poultry.
Cookers: Creator of Octoforks™ Rotisserie System U.S Patent Pending
Mini WSM, Jumbo Joe mini WSM aka Jimmy w/ CB Roti & Meat hanging ring, 22.5" kettle w/ CB kit, Creator of the world famous 007 Super Grill Smoker Roti
, Big Poppa UDS, gasser grill and Weber 22.5" kettle w/ CB Roti
Official 007 Thread: "007" http://www.bbq-brethren.com/forum/sh...d.php?t=231293