250 First Time Texas Open Offset

Horizontal smokers with a side firebox and tuning plates.
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Texassmoke17
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250 First Time Texas Open Offset

Post by Texassmoke17 » May 18th, 2022, 10:11 am

Scored a 1946 250 gallon for my first build. Looking at doing a Moberg style with a round insulated firebox. Where is the best place to start to get an idea on firebox volume, also wanting to use a 8" 90 degree elbow reduced to 6" stack?
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Dirtytires
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Re: 250 First Time Texas Open Offset

Post by Dirtytires » May 18th, 2022, 1:58 pm

Cool tank!

Start by plugging your tank volume into the pit calculator and it will tell you what your other volumes (firebox, chimney, vents, gap, throat) should be.



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Big T
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Re: 250 First Time Texas Open Offset

Post by Big T » May 18th, 2022, 9:22 pm

:yth:


Measure Twice.....Cut Three Times.

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Re: 250 First Time Texas Open Offset

Post by Texassmoke17 » May 20th, 2022, 12:23 pm

Took some basic measurements and looks like 87x 30 inch tank...



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Re: 250 First Time Texas Open Offset

Post by hogaboomer » May 20th, 2022, 10:57 pm

Plug your numbers into this:

http://bbqpitcalculator.com/


I live on Hogaboom Road.

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Dirtytires
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Re: 250 First Time Texas Open Offset

Post by Dirtytires » May 22nd, 2022, 11:47 am

I'll make it even simpler than that....according to the North Texas Tank Company, the volume of that tank is exactly 246 gallons.



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hogaboomer
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Re: 250 First Time Texas Open Offset

Post by hogaboomer » May 22nd, 2022, 12:00 pm

I think he wants somebody to run the numbers for him.


I live on Hogaboom Road.

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Re: 250 First Time Texas Open Offset

Post by Dirtytires » May 23rd, 2022, 10:39 am

Yea, think you are right Hogaboomer. Got a few minutes this morning before I have to get back out to the shop so here is what I came up with.

Tank volume: 246 gal
Firebox size: 18942cubic inches is about right at 107%. Works out to 30" x 26" x 26"
Chimney: 1014 cubic inches. 8" x 20" would look pretty good
Intake: 60 square inches total. I like one on each side of firebox so 30 square inches each.
Throat: 162.25 square inches.

Another thought is to check out the plans that Frank has on the home page. If you look on the home page, he has a free set of plans for the "legacy 250" which would give you a ton of information and great reference for your build. It will cost you $12.95 for shipping and worth every cent in my opinion. Of course, we are here to help if you need it as well.

Hope this helps....



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Re: 250 First Time Texas Open Offset

Post by Texassmoke17 » May 24th, 2022, 12:26 pm

Mainly just double checking myself on firebox throat opening and stack size and length... I maybe over thinking alot of it...lol, wanting to do a round fire chamber with square insulated box. 24x30 was my calculation for chamber size but was gonna mount it more like a square is mounted....



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Re: 250 First Time Texas Open Offset

Post by Texassmoke17 » May 24th, 2022, 12:29 pm

Was looking at going with an 8" round elbow and reducing it to 6" pipe stack



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