Need help with building an offset.

Hawg Father of Seoul · 11-09-2012, 07:34 PM

We have a 30 x 48 pipe (rounded ends). Was figuring a 20 x 20 (id) firebox would work. Was trying to figure out how big to make the opening from the firebox to the chamber.

Thanks.

Garrett · 11-09-2012, 07:39 PM

I do know that you need the same square inches going in as you have coming out. There's a ratio chart on the web somewhere for it. I will try to find it or maybe someone will chime in who knows all that info.

Swamp Donkeyz BBQ · 11-09-2012, 07:40 PM

Yes, as stated above there's a chart and maybe a calculator also.

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Garrett · 11-09-2012, 07:45 PM

http://webpages.charter.net/tomchism...Calculator.htm

Maybe this will help or maybe there is a better one chart. Just google ratio chart for building a smoker. I know this is in a spreadsheet form and you can enter your dimensions and it will calculate for you.

Novass · 11-10-2012, 12:03 AM

Not to run the build off, but you can try smokerbuilder.com . a lot of good people over there that can answer your ?.

Pappy · 11-10-2012, 08:08 AM

We use this one.

http://www.thesmokering.com/forum/viewtopic.php?t=20871

11-09-2012, 07:34 PM	#1
Hawg Father of Seoul is one Smokin' Farker Join Date: 09-14-10 Location: Rogers, AR Downloads: 0 Uploads: 0	Need help with building an offset. We have a 30 x 48 pipe (rounded ends). Was figuring a 20 x 20 (id) firebox would work. Was trying to figure out how big to make the opening from the firebox to the chamber. Thanks.

11-09-2012, 07:39 PM	#2
Garrett Take a breath! Join Date: 10-03-12 Location: Gastonia North Carolina Downloads: 0 Uploads: 0	I do know that you need the same square inches going in as you have coming out. There's a ratio chart on the web somewhere for it. I will try to find it or maybe someone will chime in who knows all that info. __________________ My arsenal, Stumps Clone, Two Modified offsets, open pit with grate and rotisserie,UDS, and a free to me Weber One Touch Silver 18.5" kettle

11-09-2012, 07:45 PM	#4
Garrett Take a breath! Join Date: 10-03-12 Location: Gastonia North Carolina Downloads: 0 Uploads: 0	http://webpages.charter.net/tomchism...Calculator.htm Maybe this will help or maybe there is a better one chart. Just google ratio chart for building a smoker. I know this is in a spreadsheet form and you can enter your dimensions and it will calculate for you. __________________ My arsenal, Stumps Clone, Two Modified offsets, open pit with grate and rotisserie,UDS, and a free to me Weber One Touch Silver 18.5" kettle

11-10-2012, 12:03 AM	#5
Novass On the road to being a farker Join Date: 02-15-10 Location: Wylie texas Downloads: 0 Uploads: 0	Not to run the build off, but you can try smokerbuilder.com . a lot of good people over there that can answer your ?. __________________ 22.5 ots, 26.75 otg, uds, Stok island gasser,

11-10-2012, 08:08 AM	#6
Pappy is One Chatty Farker Join Date: 05-09-11 Location: Granite City, Illinois (Near St. Louis "GO CARDS") Downloads: 0 Uploads: 0	We use this one. http://www.thesmokering.com/forum/viewtopic.php?t=20871 __________________ Performer, UDS, 1983 WSM, Frank-in-Weber, 120 Gallon Offset, IQ-110, ET-732

11-09-2012, 07:40 PM	#3
Swamp Donkeyz BBQ Take a breath! Join Date: 07-25-12 Location: Huntsville, Tx Downloads: 0 Uploads: 0	Yes, as stated above there's a chart and maybe a calculator also. Sent from my iPhone using Tapatalk