1st Smoker Build Help

Horizontal smokers with a side firebox and tuning plates.
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matt08titan
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1st Smoker Build Help

Post by matt08titan » December 16th, 2016, 12:50 am

ImageImageImage

I'm having trouble with my smoker taking too long on brisket cooks on the lower shelf. Temps are reading from 225-240. I'm constantly having to move the briskets to the top shelf and crank the heat up to finish them in a reasonable time. I've had several briskets take 18-24 hours. Let me knof if anything obvious jumps out at you.

Ive placed 9th (50 teams) 5th (80 teams) and 1st (7 teams construction company cook off) in brisket

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matt08titan
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Re: 1st Smoker Build Help

Post by matt08titan » December 16th, 2016, 12:52 am

250 gallon tank
30"x32" fire box
6"x40" exhaust
60"intake

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Re: 1st Smoker Build Help

Post by matt08titan » December 16th, 2016, 12:56 am

ImageImage

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Pete Mazz
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Re: 1st Smoker Build Help

Post by Pete Mazz » December 16th, 2016, 4:21 am

I cook at ~250 - 275 typically. I wrap after 4-5 hours and they're usually done in 8 hours.

With the FB up that high the heat goes straight up to the top of the CC. Most offsets use tuning plates that keep the heat under the lower grate.


If it's tourist season, how come I can't shoot 'em?

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Re: 1st Smoker Build Help

Post by Big T » December 16th, 2016, 5:30 pm

I agree with Pete, it looks like the height of the throat is dumping all of the heat straight to the top of the CC. That brisket looks mighty tastey!


Measure Twice.....Cut Three Times.

matt08titan
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Re: 1st Smoker Build Help

Post by matt08titan » December 16th, 2016, 8:54 pm

Thanks, Jambo Pits have a similar transition between cc and fb. But I'm not getting jambo results.

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Re: 1st Smoker Build Help

Post by temurf » December 16th, 2016, 8:56 pm

:needfood: :needfood: :needfood: I agree with Big T, That brisket does look mighty tasty. :needfood: :needfood: :needfood:


Yer gonna like what we've been smokin'.

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Re: 1st Smoker Build Help

Post by Big T » December 16th, 2016, 11:23 pm

The jambo is similar in design but they have a much smaller throat with a deflector. The stack is mounted below the bottom rack so that it cooks from the top down.


Measure Twice.....Cut Three Times.

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Re: 1st Smoker Build Help

Post by Rodcrafter » December 17th, 2016, 7:51 pm

Interesting cooker. Nice looking brisket. I guess you don't wrap your brisket, is that right?


Making memories!


Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

matt08titan
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Re: 1st Smoker Build Help

Post by matt08titan » December 17th, 2016, 7:52 pm

Butcher Paper wrap after 8 hours

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Re: 1st Smoker Build Help

Post by Rodcrafter » December 18th, 2016, 9:35 am

Oh ok, I never have used the butcher paper, only foil. I get similar times as Pete mentioned. I can plan very close to ending time


Making memories!


Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

matt08titan
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Re: 1st Smoker Build Help

Post by matt08titan » December 18th, 2016, 10:50 am

Double checking all the calcs and the throat may be too small. Feldons calcs tell me i need 176 sq inches. According to the formula in the picture i need to cut the opening 2 inches bigger. I only have a 7" x 23" slice. Thanks again for everybody's opinions. I'm also thinking about lowering the exhaust below grate level like stated above.




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Pete Mazz
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Re: 1st Smoker Build Help

Post by Pete Mazz » December 18th, 2016, 11:38 am

You can also use the throat calcs in my sig.


If it's tourist season, how come I can't shoot 'em?

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Re: 1st Smoker Build Help

Post by matt08titan » December 20th, 2016, 4:22 pm

My bad, thanks pete

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Re: 1st Smoker Build Help

Post by Pete Mazz » December 21st, 2016, 5:22 am

matt08titan wrote:My bad, thanks pete
I wrote the calcs to make it easier to plug in numbers from the PitCalc instead of doing it manually like you did. Both work. :beer:


If it's tourist season, how come I can't shoot 'em?

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Re: 1st Smoker Build Help

Post by matt08titan » December 23rd, 2016, 12:28 pm

Made some adjustments, going to test them out over the holidays.ImageImageImage

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Re: 1st Smoker Build Help

Post by matt08titan » December 23rd, 2016, 12:32 pm

Increased fb to cc throat from 110 sq inches to 175 sq inches per the formula
Installed baffle on the exhaust so it draws lower in the pit. Installed a new fb door to create a better seal because the old one was heavily warped.

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Re: 1st Smoker Build Help

Post by Big T » December 23rd, 2016, 3:00 pm

The door turned out nice, let us know how the mods work out.


Measure Twice.....Cut Three Times.

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Re: 1st Smoker Build Help

Post by Rodcrafter » December 23rd, 2016, 7:58 pm

Yes


Making memories!


Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........

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Re: 1st Smoker Build Help

Post by myevick » July 29th, 2017, 10:24 pm

matt08titan wrote:Double checking all the calcs and the throat may be too small. Feldons calcs tell me i need 176 sq inches. According to the formula in the picture i need to cut the opening 2 inches bigger. I only have a 7" x 23" slice. Thanks again for everybody's opinions. I'm also thinking about lowering the exhaust below grate level like stated above.




Image

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Im not very computer savvy. Were can I find this calculator? It wont let me click on it.



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Re: 1st Smoker Build Help

Post by Big T » July 29th, 2017, 10:51 pm

These are the 2 links that you are looking for app.php/page/other-calcs and http://www.smokerbuilder.com/pitcalc/


Measure Twice.....Cut Three Times.

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