Question on lenth of smoke stack for CG Outlaw

[redneck1676]

Onmy CG Outlaw I was reading about the lenth of the smoke stack for optimum draw. I used the Feldon bbq pit calculator it said i need a a stack of 21.5 Inches. Does that sound right? I'm not sure I'm a newbie. Cooking chamber 19.75"x37" Firbox 15"x17.25 Thanks Jason

 

[chef jimmyj]

That sounds about Right. However, the stack should go down within a few inches of the Grate. You can see on this NB pic that the stack is about 14" outside and about 10" inside...JJ

 

[daveomak]

redneck, morning...  I used 17 D x 15 L for the fire box....  170 cu in for the stack... 3" stack = 24" ///  

                                15 D x 17 L FB = 150 cu in.. 3" stack = 21.3" tall....  

If you install the stack lower to the food grate, increase the length by the distance from the top of the CC to the end of the stack..

So, for further info, dimensions need to be labeled for proper calculations...   Dave

 

[redneck1676]

So here are better dimension. CC 19.75dia X 37L FB 15dia X 17.25L. Existing stack is 3dia 6.25" outside and 14" dryer vent inside. Does the length of the stack include the vent inside? Hope that's enough info. Thanks

 

[daveomak]

 15 D x 17 L FB = 150 cu in.. 3" stack = 21.3" tall....    That is the length of the stack ABOVE the top of the cooking chamber (recommended height)... Adding stack to the inside of the cooking chamber, ie. lowering to just above the cooking grate, is supposed to increase the heat flow across the cooking grate for more uniform cooking of food at that level and does not enter into the calculation....   

All of this calculation stuff and stack lowering, is predicated on the smoker being pretty much air tight from firebox inlet to exhaust stack...  Leaking around the door or firebox etc. kind of messes up the dynamics of the smoker operation...

Dave

 

[redneck1676]

Thanks Dave I will be sealing the cooking chamber and firebox doors shortly. I know they leak allot of smoke and heat. I did 40# pork butt the other day for a church event and turned out good just have to fight the temp a bit. Raining didn't help things

 

[redneck1676]

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• redneck1676
• Mar 12, 2013