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Modify my patio offset

dockman

Smoking Fanatic
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Joined Jun 14, 2013
I have had this smoker for over 20 years. I think it is what is considered an offset smoker. A customer built it for me as partail payment on a boat dock. It is built very well 16" diameter by 1/4" thick but after researching a big RF build I decided to check this thing out. The CC is 16" x 31" ** FB 16" x 17" ** FB Intake is 4" round ** FB to CC is 9" x 9" ** and Exhaust is 3.5" ID pipe x 30" long. According to Feldon calculator the FB is way to big, the vent is to small, exhaust to to long, and FB to CC is way to big. Since I own a welding shop I would like to correct these issue and if possible make it RF? What should I do to make it right? I was thinking close the FB to CC opening to correct size, open vent some and shorten exhaust. And if I could make RF I would do that also and then move exhaust to other end. I will post a picture as soon as I can find one.




 
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hambone1950

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Joined Jul 23, 2012
Hey man. I don't know about this stuff myself , but my advice is send a PM to dave
omak . He is the most knowledgable on this forum about building smokers. Good luck.
 

dockman

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Joined Jun 14, 2013
Don't want to bug him I am sure he has seen my post. Been doing some reading and it seems that "Tuning Plates" & "Charcoal Brasket" is a must. I will also be cutting down my exhaust length and sealing all doors with Red High Temp silicone.
 

dockman

Smoking Fanatic
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Joined Jun 14, 2013
Spent today modding my smoker with the tuning plates, charcoal basket, and shortening exhaust. Have a fire going as I type tuning and seasoning it. Hope it works out good cause I would like to do baby backs on it tomorrow instead of the MES 40. Here are a few pictures of what I done.

The charcoal basket is plenty big 12" x 15" x 5"


I have about 4" from bottom of basket to bottom of fire box.


This is the plate I made to also decrease the hole size from FB to CC. It is 5" off the floor of CC at FB side and 4" on CC (The other 2 tuning plates are 4"  also).


The FB to CC hole was 8 1/2" x 9"


Now opening is 8 1/2" x 5"

 

dockman

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Joined Jun 14, 2013
Smoker has been going for about an hour now at first one side was 300 degrees and the FB side was 225. I slid the middle plate over about 1 1/2" and now I have 255 and FB side is 245. I moved middle plate about 1" or less more. Waiting to see how that works out as I type. Outside temp is 26 degrees!
 
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dockman

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Joined Jun 14, 2013
All I had at my shop was 8" & 10" plate so I went with the 8". I cut 3 plates 8" x 13 9/16" x 1/4" welded the FB plug to one of them so I only have 2 plates to move. Bolted it in place with SS bolts and nuts.



Oh almost forgot I added a 2nd thermometer and relocated the oridginal one.


This thing weighs a ton and I had no help loading it in the truck. My shop is 2 miles away so I had to build the items at shop then come home and fit them. I would have like to of done a better kob but not having smoker right there with me it was not possible. I still need to fill old thermometer hole for now I have a quarter over it and tape in place with gorilla tape.
 

dockman

Smoking Fanatic
593
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Joined Jun 14, 2013
Thank you! I will find out tomorrow doing 3 slabs of baby backs.
 

dockman

Smoking Fanatic
593
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Joined Jun 14, 2013
My grate was only about 2" above the tuning plates. The ribs were way over cooked doing the 3-2-1 method so I raised the grate to 4" above tuning plates and split 2 of the plates in halves. Now I have the 8" plate welded to fb plug, 1 - 5", 2 - 4", & 1 - 3" tuning plate. Cutting the plates and raising the grate was a big help in controlling heat however I am still struggle getting even heat from side to side.
 

dockman

Smoking Fanatic
593
26
Joined Jun 14, 2013
I went ahead and lowered the tuning plates another 1/2" or so plus added 1 more 2" wide plate. I believe the FB is to big so I made these removable plates to fill in FB. The plates cuts off around 400 square inches plus blocks heat from CC wall.



 

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