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fire bricks in the fire box ?
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Midwest Freak





Joined: 20 Aug 2013
Posts: 89


Location: Rayville , Mo

Post Post subject: fire bricks in the fire box ?  Reply with quote

i see a lot of guys putting fire bricks in the floor of their fire box , what does this do ? my guess it helps hold the heat better but would like to know your thoughts on this ? here's a pic that Ben Lang posted on his face book page


Post Posted: Sat Nov 09, 2013 6:56 pm 
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animal





Joined: 14 Jul 2010
Posts: 388


Location: Wisconsin

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Helps to insulate and raising the fire a friend tells me makes his more efficient, the concern I have is the ash collecting between the blocks and causing rust, maybe line the box with foil first to keep the ash off the bottom.  


Last edited by animal on Sat Feb 01, 2014 2:35 pm; edited 1 time in total
Post Posted: Sat Nov 09, 2013 11:42 pm 
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Wood River BBQ Team





Joined: 16 May 2013
Posts: 426


Location: Tucson, AZ

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On my Cheapo Char Grill Smoking Pro I had to try every trick I could think of to maintain heat, which leaked all over the place. I installed "tunning plates" and a "baffel" in order  to reverse flow the heat and smoke and under the plates I used LAVA ROCK. That mod worked. Eventually, I converted it to propane and used lava rock around the burner in the fire box.

I was thinking of adding lava rock to the Lang fire box but it sure would be a pain to clean out the ash so I rejected the idea. Fire bricks would also be a pain to clean out the ash. Additionally, I don't think the Lang  needs any modification to the fire box BUT if Ben Lang added them to his smoker then what do I know. It will be interesting to see what others think.

Don G

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Post Posted: Sat Nov 09, 2013 11:44 pm 
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Midwest Freak





Joined: 20 Aug 2013
Posts: 89


Location: Rayville , Mo

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just to clarify Ben shared a pic of someone else cooker , he not saying to put them in there but why are so many people doing it is what i want to know . they are heat resistance bricks so they block the heat so i thought it would take the cooker longer to heat up and not heat evenly just do not get  it ?  Confused
Post Posted: Sat Nov 09, 2013 11:58 pm 
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mr.piggy





Joined: 12 Feb 2012
Posts: 55


Location: phila,pa.

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hey fellas last wk while was getting ready to cook I checked the bottom of my fire box, and yea the heat loss. I was thinking fire brick also. but how about a piece of thin gauge sheet metal  , on top of the bricks to catch the ash.

            vincent
Post Posted: Sun Nov 10, 2013 11:34 am 
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Wood River BBQ Team





Joined: 16 May 2013
Posts: 426


Location: Tucson, AZ

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I'm smoking a turkey today and I'll measure the heat on all fire box walls with my infrared thermometer and publish the results.

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Post Posted: Sun Nov 10, 2013 1:59 pm 
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Wood River BBQ Team





Joined: 16 May 2013
Posts: 426


Location: Tucson, AZ

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Here's the temperature readings. The Lang gauge read 290F as did my chimney temp gauge and the digital temp at the meat was 300F. The temp for the front side was 501F, the back side was 503F, the top was 534F (probably because heat rises) and the bottom was 494F.

Taking a cue from Mr. Piggey (thin gauge sheeet metal) I decided to shove a piece of alum foil under the fire grate, which isn't easy because that's one hot sucker -- have your arm hit the door to find out what I'm talking about. 15 minutes later the bottom temp had dropped to 313F!!

I think that shows a couple of things -- fire bricks would prevent heat from escaping through the bottom and would radiate heat upwards and the alum foil makes ash clean up easy. A piece of sheet metal might be a better idea but I think it's easier for me to fold up the ash in alum foil. The problem with the sheet metal is the door opening size versus the bottom of the fire box --ash would fall all over the place.

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Post Posted: Sun Nov 10, 2013 9:21 pm 
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mr.piggy





Joined: 12 Feb 2012
Posts: 55


Location: phila,pa.

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[quote="Wood River BBQ Team:2396"]Here's the temperature readings. The Lang gauge read 290F as did my chimney temp gauge and the digital temp at the meat was 300F. The temp for the front side was 501F, the back side was 503F, the top was 534F (probably because heat rises) and the bottom was 494F.

Taking a cue from Mr. Piggey (thin gauge sheeet metal) I decided to shove a piece of alum foil under the fire grate, which isn't easy because that's one hot sucker -- have your arm hit the door to find out what I'm talking about. 15 minutes later the bottom temp had dropped to 313F!!

I think that shows a couple of things -- fire bricks would prevent heat from escaping through the bottom and would radiate heat upwards and the alum foil makes ash clean up easy. A piece of sheet metal might be a better idea but I think it's easier for me to fold up the ash in alum foil. The problem with the sheet metal is the door opening size versus the bottom of the fire box --ash would fall all over the place.[/quote]   don thanks for taking the time to check the lost heat for every one. the bottom temp  was 494 f then you put  the alumin foil the temp. droped ro 313 f  that is a 181f  loss in cooking heat .  fire brick for me this weekend.  thanks  you  vincent
Post Posted: Tue Nov 12, 2013 12:35 am 
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Midwest Freak





Joined: 20 Aug 2013
Posts: 89


Location: Rayville , Mo

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thanks for taking the time to analyze the temp difference  Very Happy
Post Posted: Tue Nov 12, 2013 12:51 am 
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Wood River BBQ Team





Joined: 16 May 2013
Posts: 426


Location: Tucson, AZ

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Vincent: This morning I cleaned out my fire box and laid in 2 sheets of heavy duty alum foil with the shinny side up. I don't think the fire bricks, unless I could find thin ones, will work for me. The reason is because of my charcoal basket and the door opening. The front of my basket is shorter than the sides so I can add fuel. Bricks the size of the ones in the picture would raise my basket too high and make it harder for me to add fuel. The other concern I have is the one Animal brought up -- ash collecting between the bricks and causing rust. With the alum foil I just fold it up after the cook, dispose of it and add 2 more sheets.

Don G


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Post Posted: Tue Nov 12, 2013 2:16 pm 
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