MadCow wrote:Two things here .... the bark is one of the best bits!!! also, why change foil all of the flavour is in the juices in the first foil, don't do it ... it wastes foil and loses flavour!!!
To address your two points...
I agree bark is good, but by foiling part way through the cook and adding a foil marinade you get to add some flavour in there that gets soaked up into the meat, adding another flavour aspect through the meat. Also it helps retain moisture in the meat, protects from excess smoke, preserves the colour of the end product and slightly accelerates the cook time to allow more resting. (I've found that now I've got a Cambro the resting time makes so much difference as the meat holds above the plateu temeprature for a few hours).
Yes the cost is that the bark softens a bit, however it still has the barky flavour and you're bark will soften if you rest in foil for a few hours anyway, so I don't think that the cost is too high. I've considered throwing the butt back on the smoker for a half hour before turn in to re crisp the bark but have not experimented with that yet.
As for why I change the foil, erm I don't have a good reason for this

When I takle the pork from the cooker I get it oput of the foil and let it vent for five minutes to stop it from continuing to cook while resting - no-one likes mushy pork!!! When I take it from the foil I just transfer to new foil and preserve the juices for my sauce. Really I should vent and then rewrap now I've actually thought about it
I know a perfect score is difficult to achieve and it takes a lot of luck too. You need the right judges on the right day to get one. I've no plan to over tweak, I keep records of every cook we do with notes about what we did and the outcome. I think that our pork is very good in general, I need to make sure I get a money muscle out every time and the sauce could do with a little more kick, but other than that I don't think that there's much tweaking to do. But once you get the box numbers, I will hopefully know if something else needs work.
But one day I WILL get a perfect score!!!!
