There frequently is some variation between rack temps but a drip pan on the lowest shelf and the units water pan, many guys fill them with play sand to make a heat sink, will go a long way to evening out temps and protecting the butt on the lowest rack. Below is some good info but I find if smoking around 225, it is best to figure 2 hours per pound and add 2 hours to CYA in case the unexpected comes up.
http://www.smokingmeatforums.com/t/57139/basic-pulled-pork-smoke
Foiling Juice / Sweet Pulled Pork Finishing Sauce
Foiling Juice
For each Rack of Ribs Combine:
1T Pork Rub, yours
1/2 Stick Butter
1/2C Cane Syrup... Dark Corn Syrup...or Honey
1/4C Apple Cider...or Juice
1T Molasses
Optional:
2T Vinegar, 2T Mustard and 1/4C Ketchup to make it more of a KC Style Glaze.
Simmer until a syrupy consistency.
Allow to cool for 5 minutes, pour over foiled Ribs and
run your 2 hour phase of 3-2-1. For the last phase return
the ribs to the smoker BUT reserve any Juice remaining
in the Foil. Simmer the Juice over med/low heat to reduce to a saucy thickness. Glaze the Ribs for presentation or service.
For a Sweet Finishing Sauce for Pulled Pork: Make a Double batch, skip the Butter.
Add 1/2 the batch to the Foil Pack or place it in a Pan with your Butt, when the IT hits 165*F.
Cover the pan with foil and continue to heat to 205*F for pulling.
At 205* rest or hold the Butt in a cooler wrapped in towels until ready to serve.
Pull the Pork and place it back in the pan with the pan Juices and any additional reserved Foiling Juice to moisten and Serve...OR... Bag and refrigerate until needed.
When re-heating place the Pulled Pork in a Pan or Crock pot and add reserved Foiling Juice or Apple Cider, as needed to make up the Juice that was absorbed while the pork was refrigerated. Cover and re-heat in a pre-heated 325-350*F oven or on High in the crock pot to 165*F and Serve.
Note: the addition of the reserved Foiling Juice or Apple Cider should make the PP moist but not Swimming.
I was AMAZED...No additional sauce needed. ENJOY...JJ
Tangy Pulled Pork Finishing Sauce
This is more of an Eastern North Carolina style Finishing Sauce...
2 C Apple Cider Vinegar
2T Worcestershire Sauce or more to taste
1/4C Brown Sugar
1T Smoked Paprika
2 tsp Granulated Garlic
2 tsp Granulated Onion
2 tsp Fine Grind Black Pepper
1 tsp Celery Salt
1 tsp Cayenne Pepper or Red Pepper Flake. Add more if you like Heat.
1/2 tsp Grnd Allspice
Combine all and whisk well. This is a thin sauce, bring just to a simmer and remove from heat. Adjust sweetness by adding Brn Sugar or additional Vinegar as desired...Makes about 2 Cups.
For a
Lexington Style Dip add, 1/2C Ketchup and 1-3tsp Red Pepper Flakes...JJ