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Discrepancy between grate and dome?

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Larrymac
Larrymac Posts: 103
in EggHead Forum
Cooking 2 pork butts. Was going to do turbo method.
Grate temp is 290. Dome says 410. Is that a problem?
If so why is it happening and how is it fixed ?
Fortunately not cooking for anyone but myself so no real hurry
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Comments

  • TurtleTiger
    TurtleTiger Posts: 93
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    IMO it would seem one of your thermometers is out of calibration. Try hooking the grate thermometer to the dome pin and see what it reads?
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  • Skiddymarker
    Skiddymarker Posts: 8,522
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    If you are cooking indirect, using setter or AR with a stone, it is possible that the dome and grid temp may be as much as 100ºF different for the first 20 minutes or so, dome being higher. After that they should settle in to be between 20ºF and 50ºF apart. After a couple of hours, they will get much closer. 
    I'd trust the grid thermo, assuming it is a MAverick or equivalent. Pull your dome thermo and check calibration. 
    (BTW to many old timers the grid is what you cook on, the grate is what the charcoal sits on)
    Delta B.C. - Whiskey and steak, because no good story ever started with someone having a salad!
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  • Larrymac
    Larrymac Posts: 103
    edited January 2014
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    Yes I'm an old timer.
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  • Larrymac
    Larrymac Posts: 103
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    Grid temp has been steady 291-293 with Mav.
    Dome has now dropped to 395. Thanks for the heads up
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  • Cookinbob
    Cookinbob Posts: 1,691
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    I have seen the same even an hour into a cook. Go figure
    XLBGE, Small BGE, Homebrew and Guitars
    Rochester, NY
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  • lousubcap
    lousubcap Posts: 32,375
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    I've not seen that large a difference but if everything is in calibration then "believe your indications". 
    Louisville; Rolling smoke in the neighbourhood. # 38 for the win.  Life is too short for light/lite beer!  Seems I'm livin in a transitional period.
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  • Hungry Joe
    Hungry Joe Posts: 1,567
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    A couple of things could be in play here.

    One, the grate probe is to close to the cold meat.

    Two, one or both your thermometers could be off, with the dome more likely to be off.

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  • revolver1
    revolver1 Posts: 372
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    Check your dome probe and go for it.  It will take 5 hours@350  to finish the butt and it will be fine. 
    Dan, Columbia,Mo.
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  • Cookinbob
    Cookinbob Posts: 1,691
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    FWIW, when I encountered the large difference, I checked cal on all three probes and they were good!  At the end of the day (or the cook) I go by the probe temp in the meat, and have not over or under cooked anything.
    XLBGE, Small BGE, Homebrew and Guitars
    Rochester, NY
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