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I bought a 4" to 3" galvanized reducer. I got it at ether Lowe's or HD in the hot water vent pipe department. I drove the 3 ' side into the CC output and used the bolt that came off the original stack and tightened it in. I cut a slit on 1 side with my Dremel so it would drive all the way in...
I have an older Oklahoma Joe Longhorn, too but not as old as yours. Mine is a 3/16" thick version made by New Braunfels around 2003. I have a home-made baffle as well as a store bought Horizon. With either unit I got about a 60 degree difference from firebox to exhaust. One day I pulled the...
What dcecil said +1 ...Sounds like you might not have enough draw. When you did the mods, did you put in a heat diffuser in the CC side then add tuning plates? If so, is the any part of the diffuser angled below the top of the hole from the FB blocking air flow? Are there too many tuning plates...
6" plates should be fine. I have one thermometer in the top and it is almost to the top on the left side. You can see it's probe just above the left hinge. I still use is the one that came with the unit originally for it is accurate enough (within +<10 degrees of my IGrill2 probes) for what i...
Blowing Smoke - Here is a picture with the grates removed. The plates stop almost dead center of the 40" CC. There is not a gap between the diffuser and the first plate, it just looks like it in the picture. When first setting this up there was too much downward angle on the diffuser and...
My tuning plates are 3/16" thick, 4" x 18" and sit 3" below grate level. The CC is 20” in diameter x 40" long. I use 2 tuning plates plus the firebox diffuser. The diffuser is mounted against the firebox with spacers creating a 1" air gap between it and the firebox bulkhead. The first 4 x 18...
Try changing your stock 3" smoke stack to 4" to improve the draw. It is cheap & easy to do since the output is already 3.5". I think the tuning plates and the CC elbow above the grate restrict air flow too much. When i removed one of my plates it helped, but when combined with a 4" stack the pit...
Blowing Smoke - I had some draw issues that were especially more pronounced on humid and or low wind days. I decided the added tuning plates restricted flow too much for they were not included in the initial design of the smoker. The first thing was to use Feldon's BBQ calculator (its online) to...
Once I figured out where I got a good temperature across the CC, I have not changed them. I recently went from the stock 3” smokestack to a 4” one and now it averages about 2 degrees side to side, best mod I have done on my 2004 Oklahoma Joe since I bought it 14 years ago.
Welcome Thomas the Tank! That was my sons favorite program for he loved trains and his name is Thomas. There is plenty of great ideas and help here for getting started right.
Update: Last week i converted my Oklahoma Joe stack from the factory 3" to a 4". The exit port on my smoker is 3.5" so I used a 4" to 3" reducer, trimmed flush on the CC side, a 4" elbow and a 24" piece of 4" vent pipe. Since it is for exhaust only I was not too concerned that the parts are...
I spent a Saturday morning with a blank spreadsheet, big bag of lump and three Igrill 2 digital probes. It was really interesting to see the difference little moves made. I kept having a 60 to 80 degree difference from firebox to the cook chamber end until I tried 1" spacers on the two bolts...
I have an older (circa 2004) New Braunfels Oklahoma Joe Longhorn. I researched and read somewhere that you measure the distance outside of the CC. My "correct" length came to 34" so I added 11". It seems to draw pretty well whereas prior it struggled on very humid days. I pulled the calculation...
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