Position of Firebox from the CC grate

Horizontal smokers with a side firebox and tuning plates.
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Newsmoke
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Position of Firebox from the CC grate

Post by Newsmoke » June 21st, 2018, 4:28 am

I'm struggling with my planning of the smoker but i'm getting there.
Is there a rule for the position of the Firebox throat from the CC cooking grate (how many inches below the grates)? I have decided to go with a half moon throat that will be at the top edge of the FB. I will also plan to install a buffer plate on top of the throat and might even add tuning plates.

Thanks for your wisdom!



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Pete Mazz
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Re: Position of Firebox from the CC grate

Post by Pete Mazz » June 21st, 2018, 4:38 am

For a standard offset I'd do a trapezoidal throat as they have a built in dam. Tuning plates will give you the ability to regulate temps across the CC.


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Re: Position of Firebox from the CC grate

Post by Newsmoke » June 21st, 2018, 4:46 am

According to my calculation with the half-moon just below the grate I still have a 5.5inch grease dam. that's why I would like to know the general rule for the throat and grate distance in order to insure that I have sufficient dam. From what I read here a 4 inch dam is sufficient right?



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Re: Position of Firebox from the CC grate

Post by Pete Mazz » June 21st, 2018, 5:44 am

I'd keep the top of the FB low and have 4 or5 inches to the grates . The dam only needs to be 1 1/2" or so. There are calcs in my sig for different throat shapes.


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Re: Position of Firebox from the CC grate

Post by Newsmoke » June 21st, 2018, 6:24 am

Hey Pete, I already did my calculations based on your calculators! Life saver! I just tweaked it a bit in the sens that instead of a half moon cut from the bottom of the CC I reverse it to go on the top of the firebox to allow a dam. which throat shape is the best in your opinion? Trapezoidal?



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Re: Position of Firebox from the CC grate

Post by Dirtytires » June 21st, 2018, 9:00 am

Depends what you are cutting with.....sem-circle is a challenge if using a grinder. Trapazoid seems to be a little easier to adjust size if needed...both will work.



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Re: Position of Firebox from the CC grate

Post by Newsmoke » June 21st, 2018, 8:10 pm

Oh yeah right good call, I will be using an angle grinder so it does make sens to do the trapazoid.



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Re: Position of Firebox from the CC grate

Post by Dirtytires » June 22nd, 2018, 12:00 am

Yep...I only cut circles with plasma....lol



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Re: Position of Firebox from the CC grate

Post by Rodcrafter » June 22nd, 2018, 8:02 am

Yeah that!


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