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Unread 09-27-2010, 04:29 PM   #1
D.F. Expat
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Default Stoker temp swings

What are most people seeing for temp swings with their stoker? Mine seems to start out pretty tight then for whatever reason after an hour or 2 I start getting temp swings of 20-30 degrees over and under target. Any Ideas on how to correct this? Using it on a uds with lump and the 10cfm fan.

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Unread 09-27-2010, 04:42 PM   #2
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I don't know but I been told. Lump ain't so good in a UDS.
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Unread 09-27-2010, 04:44 PM   #3
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I use lump on all my UDS smokes.

I don't use a fan but perhaps your chips or chunk wood are catching fire and causing the temperature to fluxuate?

Is the drum sealed good?

My UDS temps fluctuate a bit when first getting it up to temp and trying to stabilize on a desired temp. But once that's done (1st hour) it doesn't take much watching at all.
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Unread 09-27-2010, 06:29 PM   #4
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Drum is sealed tight, lid has 4 1 inch holes for exhaust. I wonder if the 10cfm fan is too much?
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Unread 09-27-2010, 07:08 PM   #5
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I found that the 10cfm fan is too aggressive for my XL BGE, at least at low & slow temperatures. I cover half the fan inlet with duct tape.

Also, I find that the Stoker is far too aggressive in getting the lump started at the beginning of the cook. I get the temperature real close manually before I engage the Stoker. I feel that the aggressive start can cause wild swings later on, too. If too much of your charcoal bed is "involved" in the fire near the start of the cook, I think you end up repeatedly re-starting and re-snuffing out the fire with the Stoker during a good part of the cook. It is better IMHO to have the lump become involved gradually as the fuel is needed.

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Unread 09-27-2010, 07:11 PM   #6
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Quote:
Originally Posted by donmiller View Post
I found that the 10cfm fan is too aggressive for my XL BGE, at least at low & slow temperatures. I cover half the fan inlet with duct tape.

Also, I find that the Stoker is far too aggressive in getting the lump started at the beginning of the cook. I get the temperature real close manually before I engage the Stoker. I feel that the aggressive start can cause wild swings later on, too. If too much of your charcoal bed is "involved" in the fire near the start of the cook, I think you end up repeatedly re-starting and re-snuffing out the fire with the Stoker during a good part of the cook. It is better IMHO to have the lump become involved gradually as the fuel is needed.

Don
Thx for the suggestion, next cook I will cover half the fan intake and see if it helps with the swings
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Unread 09-27-2010, 07:23 PM   #7
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Unread 09-27-2010, 09:44 PM   #8
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Ya, cover the fan halfway and let us know what happens. You may need a 5cfm fan. On my offset the Stoker keeps it +2/-2 degrees.
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Unread 09-27-2010, 09:48 PM   #9
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Quote:
Originally Posted by Big Jim BBQ View Post
I don't know but I been told. Lump ain't so good in a UDS.
There ain't nothing better for a drum. You just gotta pack it right.
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Unread 09-27-2010, 11:14 PM   #10
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i use a 5 cfm fan and it works really good also dont use lump burns to hot with the fan
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Unread 09-27-2010, 11:26 PM   #11
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How close are your high, low and target temps? I used to give mine a fairly wide berth but quickly learned that the device would over-correct when it had compensate for large temperature deficits. I've got mine dialed in at -2 and +3.
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Unread 09-27-2010, 11:52 PM   #12
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I didn't realize those stokers work that well. You can keep your grill within 5°?
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Unread 09-28-2010, 08:13 AM   #13
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Quote:
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I didn't realize those stokers work that well. You can keep your grill within 5°?
Yep.
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Unread 09-28-2010, 08:48 AM   #14
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Quote:
Originally Posted by OneHump View Post
How close are your high, low and target temps? I used to give mine a fairly wide berth but quickly learned that the device would over-correct when it had compensate for large temperature deficits. I've got mine dialed in at -2 and +3.
I dont use the high low alarms just set point, should I be setting alarms?


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Unread 09-30-2010, 11:53 AM   #15
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Taped off half the fan intake and put an 8.25 lb Butt in this morning about 3 hours ago and it holds temps much better than before. Once it settles in it holds usually within 5 degrees with the occasional 10 degree swing. Will post the stoker logs when the cook is complete but much happier at this point. Thx for the suggestions guys.
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