I have since learned my lesson re smoked pulled pork or smoked brisket
I estimate an average of 14 hours for pulled pork and 16-18 hours for brisket ( depends not on weight but thickness.) I hate to have guests waiting impatiently for their meal even if I have appetizer and drinks on hand. So, I try and smoke it in the middle of the night, time it to be ready 3 hours before guest are to arrive, double wrap with foil, place in a faux cambrio with tons of tea towels to keep it insulated. This keeps the meat warm, moist up to 5 hours)
Found out this past Friday that if I split the butt in half, cooking was 11 hours for the the thinner piece, 14 hours for the thicker piece with bones. I do not like the thinner piece to be overcooked beyond 203 internal temp, so I pulled it out. Placed it in a cambrio, thinking that I will place it back in the smoker before the thicker piece is ready, but 6 hours later, the butt was still warm!! So, I now understand that even if the pieces are not even in size, if one is finished ahead of the other, just place it in a cambrio.
Never did a sirloin, but here is the instruction per MAK pellet for sirloin. 1 hour at 300 degrees with fat side up, then smoke ( 170 degrees) for 20 -30 min , until internal temp is 145-150 degrees depending on. your preference . So, it takes much less time with a sirloin than a brisket. So, you are right on the money for sirloin.
Another favorite recipe which does not take me as long is Bourbon Pork Loin 2.5-3 lbs. Cut loin in half, lengthwise, dry, add bourbon whiskey few tablespoon depending on size of loin ), wait for whiskey to saturate in, add 2 tablespoon or more of Memphis dust ( see my recipe a few days ago), add 2 tbsp dijon mustard on top of the dust, add 1/2 cup brown sugar, add more bourbon whiskey.
I lay bacon strips across the pork loin, wrap it around, 300 degrees for 1.5 -2 hours till 160 degrees. Then, brush glaze on top ( 3 tbsp butter 3 tbsp sugar, 3 tbsp mustard, 3 tbsp whiskey ) place the loin on the grill med hi , brush glaze until it is nice and brown. Reserve glaze to add on table. I serve this with smoked peach and double smoked potato
This I can prepare the same day without staying up all night. Recipe adapted from PROJECT SMOKE Steve Raichlen