Lake Dogs
Quintessential Chatty Farker
Even if you're getting sweet blue the whole way, every smoker, every combination of wood/charcoal, and the temperature and humidity all factor in and make your situation unique. Most competitors who foil do so not on temp but on a look. Know that it'll still darken up a little in the foil (at least mine do). I use hickory wood; I foil at 4.25 hours regardless of internal temperature, as it's just starting to go from that reddish color to more of a brown color.