Yesterday I cooked a three and a half pound boston butt. I started at about ten oclock in the morning and ran for nearly three hours at a steady 224*
Then after some fiddling with the firebox and some minor spiking to 235* I ran at 217*-228* till nearly seven thirty pm.
I figured it to be done at five pm...that's two hours per pound. It was at 158* and stuck at five pm
At seven-thirty I was nearly out of fuel in the smoker and the internal temp of the butt was at 186*. I took it out and foiled it and put it in a pre-heated 230* oven. Half an hour later the temp was at 183*. .
Anyway, the butt sat in the oven until nine thirty-five--when lo and hehold!! it was 194*!!. I took it out, wrapped it tightly in foil and wrapped it again in a towel and went to bed.
Mi corazon generally stays up late and she pulled it about 11pm. It actually turned out pretty good (at least it looked good, waking up in the semi-dark of our bedroom at eleven-thirty). She said there was a moderately large piece of fat still in the middle.
I gotta say though that a 12 hour cook for a three and a half pound butt is ridiculous. That's over three hours per pound. My smoker was/is working good. The probes are accurate. The temp is being taken at grill level. I thought BB was supposed to be the easiest cut of all and very forgiving. It just ain't right!! Maybe I'll stick to beer butt chix and baby backs.