3-2-1 Method – 3 hours unwrapped, 2 hours wrapped, 1 hour unwrapped. How slow is s-l-o-w heat for smoking ribs? The 3-2-1 method is 6 hours long and should mostly only be used for Spareribs or really large ribs. St Louis (or Spare Rib) style ribs have more fat and meat, so expect 45 to 60 minutes a pound as an estimate. 225°F is usually the golden rule for meat smoking, and it’s also true for baby back ribs. For more information on the 2-1-1 method check out our article Smoked Baby Back Ribs – 2-1-1 Method. Baby back ribs are one of the most iconic BBQ dishes. You can just let your barbecue ribs smoke as they are, but many people swear by what is known as the 3-2-1 method. How long to smoke the ribs and what temperature to smoke ribs along with lots of details to up your barbecue game. The short answer is between 4 and 6 hours. To some this may seem obvious but I wanted to talk about taking the membrane off the back of the ribs. Since they wont need to cook for as long. Every smoker enthusiast should be able to pride themselves on making a perfectly cooked rack of ribs. Time Factors-What type rib are you smoking? Remove the Membrane. But how long should we smoke them for? 1. There are several things to consider in answering how long it takes for ideal low and slow tenderness.