This week's Weber recipe is Stacked Baby Backs and calls for 300-325* for 2 3/4 to 3 1/4 hours.
Just FYI if you wanted to run a higher temp.
Here's the recipe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> Serves: 6 to 8
Prep time: 20 minutes
Marinating time: 30 minutes
Way to grill: indirect and direct low heat (300° to 325°F)
Grilling time: 2-3/4 to 3-1/4 hours
Marinade
1 cup sweet chili sauce
1 cup water
Grated zest of 3 limes
1?3 cup fresh lime juice
4 large garlic cloves
1/4 cup soy sauce
3 tablespoons roughly chopped fresh ginger
3 racks baby back ribs, 2 to 2-1/2 pounds each
1 tablespoon kosher salt
1. In a blender or food processor combine the marinade ingredients. Process for about 1 minute to puree the ingredients. Set aside 1 cup of the marinade to use as a basting sauce.
2. Remove the thin membrane from the back of each rack of ribs. Season the ribs on the meaty sides with salt. Brush the remaining marinade over all the ribs. Let the ribs stand at room temperature for 30 minutes before cooking. Prepare the grill for indirect cooking over low heat.
3. Brush the cooking grates clean. Stack the ribs on top of each other, with the bone sides facing down, and grill over indirect low heat, with the lid closed, for 45 minutes.
4. Undo the stack of ribs on the grill. Brush the meaty sides with some of the reserved marinade. Stack the ribs, with the bone sides facing down, moving the top rack to the bottom, the bottom rack to the middle, and the middle rack to the top. Cook over indirect low heat, with the lid closed, for another 45 minutes.
5. Undo the stack of ribs on the grill again. Brush the meaty sides with some of the reserved marinade. Stack the ribs, with the bone sides facing down, moving the top rack to the bottom, the bottom rack to the middle, and the middle rack to the top. Cook over indirect low heat, with the lid closed, for 1 to 1-1/2 hours. During this third round of cooking, move the relative positions of the ribs occasionally so that the racks that are browning a little faster cook in the middle of the stack and the racks that are not as brown cook at the top of the stack. As you move the ribs, brush the meaty sides with the reserved marinade.
6. Undo the stack of ribs and place them side by side, with the bone sides facing down, over direct low heat. Brush with a little more of the reserved marinade and continue cooking until the meat is very tender and has shrunk back from the ends of the bones, 10 to 15 minutes, turning occasionally to prevent burning.
7. Transfer the racks to a sheet pan, cover with foil, and let rest for 15 minutes before cutting into individual ribs. Serve warm. </div></BLOCKQUOTE>