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Modified SOB

post #1 of 8
Thread Starter 
I have aquired a Tiernan, Son Of Brisket Cooker, 24X48 cook surface. Had a buddy build a 24" diameter by 24" long firebox and thought I had got the damper and the opening between the firebox & smoker large enough but am having trouble getting it to draw properly. Is there a specific ratio of damper opening to firebox/smoker/chimney. I modeled it after brand name smokers(traeger etc) at a local shop. Any help will be appreciated, Thanks
post #2 of 8
Try this......
post #3 of 8
Thread Starter 

Modified SOB

Great unit Ricky. It is similer in size to mine and has what looks like all the extras I hope to have on mine someday. Could you give me some stats? Lenght & diameter of chimney, total sq inches of damper in firebox door, size of opening between firebox & smoke chamber. I'd be interested in pics of the interior of the firebox & smoke chamber.

post #4 of 8

The stack on my unit is 4" in diameter and a total of 30" long including the elbow. Did you try the link I provided in the first response?
post #5 of 8
Thread Starter 

Modofied SOB

Did just now. Haven't been on enough forums to realize that was a link. Thanks, This is what I should have done before I gave the welder to my buddy. I'll let you know what changes I needed to make & how it works out.
post #6 of 8
Good luck to ya, hope it works out for ya.
post #7 of 8
I can't get the files to open, don't have Excel. Would you happen to know how high the stack should be for a standard CG-SFB. Would the stack modification of extending the bottom of the stack to just above the grate cause the original stack to be ineffective???
post #8 of 8
You can also use Open Office's Spreadsheet application to open it which costs you nothing but a few minutes of time.
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