Any advice is welcome

[cjohnson28]

24x60 CC, with a massive throat. Fire box is 24x30x25. Intentions are to build a sleeve insulate and slide inside of that beast. How to I figure out how big the throat needs to be? Will that change if I decide to make it reverse flow vs the way it is now?
Thanks Chris




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[Rodcrafter]

Looking good


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[Big T]

There's a pit calculator at the top of the forums. You start by putting the dimensions of the CC and then play with the size of the FB until you get it in the 105%-115% range and it will give you your throat size. The throat is the same for any offset or RF.

[Dirtytires]

If you are going to insulate the firebox, I don’t see a need to make it removable. Just weld it.

[cjohnson28]

There's a pit calculator at the top of the forums. You start by putting the dimensions of the CC and then play with the size of the FB until you get it in the 105%-115% range and it will give you your throat size. The throat is the same for any offset or RF.

Thanks Big T, the fire box is currently 181% to big.
So the measurements calc gave will per FB/CC that I typed in? Correct?
So fix the FB to get the correct throat size?


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[cjohnson28]

If you are going to insulate the firebox, I don’t see a need to make it removable. Just weld it.

It won’t be, I was just saying I was going to leave the old and fab a new inside. Sorry new to building and very lost at correct wording.


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[cjohnson28]

I see everyone moving the exhaust below the grate level now. The length the calc gives is that above the CC?


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[cjohnson28]

Looking good


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Lots of work to make it cook efficiently and correctly but I’m enjoying the learning process.


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[Rodcrafter]

I t looks like a good start. The stack dimensions are from the top of the CC. The insert of the new FB will help everything. So plug in the inside dimensions of your FB insert and CC the Calculator will tell you the rest. If the numbers are still too big just plug in smaller dimensions.


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[cjohnson28]

Thank you Rodcrafter

[cjohnson28]

FB question, does the top of the fire box need to be flush with the top of the throat? There’s currently 2 5/8” from the top of the throat to the top of the FB. Does that need to be flush


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[Big T]

It is best for them to be flush. It cuts down on turbulence from the FB to the CC.

[cjohnson28]

It is best for them to be flush. It cuts down on turbulence from the FB to the CC.

Thank you sir


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[Rodcrafter]

Yep


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[Dirtytires]

I see everyone moving the exhaust below the grate level now. The length the calc gives is that above the CC?


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Keep the exhaust at the top. I’ve had both ways and much better at top. Low mounted exhaust just let stale smoke build up and drop all the soot on my meat.

[cjohnson28]

I see everyone moving the exhaust below the grate level now. The length the calc gives is that above the CC?


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Keep the exhaust at the top. I’ve had both ways and much better at top. Low mounted exhaust just let stale smoke build up and drop all the soot on my meat.

Thank you



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