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Unread 05-15-2011, 10:36 PM   #1
Whitfield
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Default propane tank grill -> smoker conversion questions...

My dad is being awesome and giving me his grill that he built from a large propane tank. The cooking chamber dimensions are approximately 25" X 80". Both cooking grates will slide out. I am divided on a few points of my conversion to an offset smoker. What size should I make the firebox and how large should I make the opening to the cooking chamber? Also, I am torn between using a Lang style reverse flow shelf or making a baffle and tuning plates. Ideally, I would like to have the option of using it as a grill too so I'm leaning towards the removableble tuning plates. Any advice is greatly appreciated. Thanks!
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Unread 05-15-2011, 10:47 PM   #2
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Trust me, full length or at least center fired box is best for uniform heat and less work.
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Unread 05-15-2011, 10:50 PM   #3
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I probably sound pretty ignorant but, I'm not sure what you said...
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Unread 05-15-2011, 10:59 PM   #4
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A full length fire box runs along the back of the cooker like this:

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Unread 05-15-2011, 11:04 PM   #5
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Ok, that makes sense. Now...what is a center fired box? And why is that better than offset?
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Unread 05-15-2011, 11:21 PM   #6
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Personally bro, I have never seen one centered in the middle. I would go with either the full length or an offset box.

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Unread 05-15-2011, 11:27 PM   #7
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Thanks, the full length box just threw in a whole new wrench. I was having a hard enough time deciding between RF or tuning plates. If I went with a full legth fire box would I just do a modified version of a baffle and tuning plates??? I have a small offset so I'm more familiar with that design.
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Unread 05-15-2011, 11:28 PM   #8
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The full length is more complicated. The offset box is what I would recommend.
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Unread 05-16-2011, 12:56 AM   #9
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Quote:
Originally Posted by NorthwestBBQ View Post
The full length is more complicated. The offset box is what I would recommend.
Ditto
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Unread 05-17-2011, 12:04 PM   #10
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Ok, so it looks like I'm going with an offset box. From the BBQ calculator it looks like I should make my firebox about 24" square with an opening from the firebox to the cooking chamber approximately 5" X 20" and 2 - 5" circular inlets on the firebox.

My biggest question at this point is whether I should use a reverse flow design or if I should go with tuning plates? I would like to have the option of using this cooker as a grill so that leads me to believe that removable tuning plates would be the best design but I'm not positive that I am correct here. Any advice is greatly appreciated!
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Unread 05-17-2011, 12:21 PM   #11
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I wouldn't think you would need an 80 in" firebox.????? For offset a 24x24 shoyld be fine if you wanted to get real creative build a 24x24 firebox and set the cooker on top of firebox, I have built five of these ,work wonderful
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Unread 05-17-2011, 12:34 PM   #12
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Quote:
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I wouldn't think you would need an 80 in" firebox.????? For offset a 24x24 shoyld be fine if you wanted to get real creative build a 24x24 firebox and set the cooker on top of firebox, I have built five of these ,work wonderful
The whole cooking chamber is 80" long. I plan to make the firebox a 24" x 24" square. Do you have any pics of the cooker on top of the firebox? Just curious, sounds like more of a project than I'm prepared for.

Any advice on RF vs. tuning plates???

Also, is ther a certain type of metal I should use for the firebox?
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Unread 05-17-2011, 03:28 PM   #13
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Here you go I think the firebox is 18x21x 1/4 On you cooker you would need at least 24x24x1/4 firebox. On one as big as your you would nee a larger base to set firebox on
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Unread 05-17-2011, 03:39 PM   #14
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Here is a pic of gtr's firebox that has a grill built into it.
http://www.bbq-brethren.com/forum/sh...6&postcount=37
As far as whether to build an RF vs a tuning plate smoker, I ain't no help on that. I'm building a 120 gal RF as we speak.
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Unread 05-17-2011, 03:42 PM   #15
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Here's the one I built. The box on top of the fire box can be used as a warmer by closing the dampner or as a cooking chamber by opening it.
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