I know this isn't a new thread, but I thought I'd just toss in the method I've been using with success.
I run a modified MES40. I use an
AMNPS with, usually, Pitmaster's Choice pellets, which are a combination of different woods.
I love to do pecans. I buy them at Sam's Club, 32 oz bags. They're raw.
I have four half-sized foil steam table pans (also from Sam's). I punched a zillion holes in the bottoms of the pans with a Philip's screwdriver to allow smoke to rise up through them.
Two bags of pecans, 64 oz total, get coated with melted butter and finely-ground spice mixture. I melt butter in a large pan and then add the spice blend. Then I stir one bag (32oz) of the pecans into the butter spice mixture to coat them as evenly as possible.
I put 16 oz into each of the hole-filled pans.
I run the smoker at 225 degrees. I stagger the pans on the four shelves in the smoker and give them 45 minutes. Then I take the trays out, stir the nuts, and rotate the tray positions and give them another 45 minutes. I do that four times so each tray spends the same amount of time in each position. Total smoking time is 3 hours.
At 225, the pecans don't get "roasted", exactly. they get cooked, but not really roasted. The level of cooking is really just what I like. The pecans are no longer raw, and the texture is great.
My MES has fairly close temperature control.
Anyhow, 225 for 3 hours for pecans seems about right to me. I think some folks might prefer them to be roasted more, but to me, the smoke, spices, and cooking at 225 is excellent.