First question: have you had experience with this before? I ask, because getting something as big and 'hard to center' as a turkey - is VERY DIFFICULT. Plan on lots of binding-twine and keep and eye on it. It'll get out of balance easily. The time will be almost 4 hours depending on your heat source. Be sure to use Indirect heat and a large drip pan below the turkey. It'll be worth it though - Happy T-Day!