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Old 05-23-2014, 09:14 AM   #1
daninnewjersey
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Default Help me with my firebox please

So I finally got my hands on a reverse flow smoker. She's a beauty and I can't wait to start playing with her. I actually had a second exhaust stack added. Problem...she doesn't want to go any higher than 225-250. So....I've attached pics in the hopes that I can get advice on how to modify her so she'll go hotter. The reverse flow plate is pretty solid and I'm certain the firebox needs to be modified...just trying to figure out how. I'd appreciate whatever you guys and gals can share. Thanks.....
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Old 05-23-2014, 09:17 AM   #2
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Needs more air, can you cut in more or bigger dampers? Also the fb looks a little too small.
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Old 05-23-2014, 09:52 AM   #3
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Quote:
Originally Posted by Blythewood BBQ'er View Post
Needs more air, can you cut in more or bigger dampers? Also the fb looks a little too small.
+1 What he said...
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Old 05-23-2014, 09:52 AM   #4
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Thanks. I can't do much about the size of the firebox but I can add more dampers. Would the grate need to be raised? How about the hole from box to cooking chamber? Does that need to be closed up at all starting from the bottom? If so, about how much?
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Old 05-23-2014, 10:02 AM   #5
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I agree needs more vents
are there any in the door?
firebox is smallish but should work

have you tried leaving the firebox door cracked open a bit?
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Old 05-23-2014, 10:03 AM   #6
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Can't see the hole FB to Cook Chamber - get better pic and maybe someone can give help.
I've had a couple small offset with too small FB and put a lil house fan blowing into dampers and it helped.
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Old 05-23-2014, 10:03 AM   #7
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The firebox is undersized and more than likely you have TO MUCH exhaust. I suggest that you plug your dimensions into Feldon pit Calculator and you will get your answers trying to play This Guessing game is like like Russian Roulette. To Quote old Joe Friday "Just the Facts man"
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Old 05-23-2014, 10:10 AM   #8
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Quote:
Originally Posted by ButtBurner View Post
have you tried leaving the firebox door cracked open a bit?
Yes and it seems the fire gets hotter it's just the temp doesn't get close to where I want it. I mean I want the option of cooking like 300-325 but she stalls out at like 225-ish.
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Old 05-23-2014, 10:20 AM   #9
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Quote:
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Can't see the hole FB to Cook Chamber - get better pic and maybe someone can give help.
I've had a couple small offset with too small FB and put a lil house fan blowing into dampers and it helped.
you can see it in the first pic

its huge actually
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Old 05-23-2014, 10:41 AM   #10
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Wow I see the opening now it is huge.
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Old 05-23-2014, 10:46 AM   #11
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With smallish FB it may not draft well enough for reverse flow - may do better as traditional with tuning plates.

I'd add a damper or two and try pushing air w a fan.
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Old 05-23-2014, 10:46 AM   #12
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This might be a dumb question, but have you tried filling up the firebox more? I can't believe that fully loaded and burning it can't heat up that cooking chamber higher than 225-250. The amount of fuel that you show in the photos might be good for low level cooking, but if you add more fuel I don't see any reason why the chamber temp wouldn't increase.
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Old 05-23-2014, 11:13 AM   #13
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You need more air and I'll bet that the calculator will tell you to reduce the size of your inlet from the FB.
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Old 05-23-2014, 11:20 AM   #14
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Quote:
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Needs more air, can you cut in more or bigger dampers? Also the fb looks a little too small.
Those were exactly my thoughts too.

Find somebody to cut off the firebox and fab a new one that is the correct size for that size of smoker.
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Old 05-23-2014, 11:28 AM   #15
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Am I wrong or is the exhaust located back by the FB? Do you think you may be losing heat straight up the stack before it gets a chance to fill the cooking chamber?
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