Yet another exhaust stack question.

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bswisher
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Yet another exhaust stack question.

Post by bswisher » December 12th, 2017, 3:34 pm

I will apologize in advance if this has been covered but I wasn't able to find it. I have all of my calculations done using the pit calc etc. I installed my stack (3.75 ID, 23 inches long) about midway between the upper and lower racks.. 20" x48" tank, RF plate 3.75 off bottom of the tank, top of lower rack 5.25 above RF plate, and bottom of top rack 6" above top of lower rack. My question is.. should the stack be cut at a 45 or is it ok to leave the bottom cut at 90 degrees?

Thanks in advance for your assistance.


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Re: Yet another exhaust stack question.

Post by Squiggle » December 12th, 2017, 4:05 pm

It's really up to you, the smoke will exit the smoker no matter which way you have the bottom. I personally like the angled bottom, but many other have made kickass smokers with the flat bottom as well. :kewl:


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Re: Yet another exhaust stack question.

Post by Rodcrafter » December 13th, 2017, 12:48 pm

:yth:

The length you decided on was measured from the top of the CC right? You don't count what is below that.

jm2cw


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Re: Yet another exhaust stack question.

Post by bswisher » December 13th, 2017, 5:18 pm

I have seen discussions claiming that it is measured from the top, some say the bottom and others say it didn't matter. I chose to go with the idea that it is drawing through the volume of pipe required for the correct velocity and that it didn't matter where that length starts or stops. If it is too short I can always extend it.


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Re: Yet another exhaust stack question.

Post by bswisher » December 13th, 2017, 5:29 pm

This is what I have right now
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Re: Yet another exhaust stack question.

Post by mp4 » December 14th, 2017, 5:22 am

Personally, I would cut it at an angle. I lean towards giving the smoke the least path of resistance out of the stack so you don't get a pocket of stale smoke hanging out somewhere in your cook chamber.

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Re: Yet another exhaust stack question.

Post by ajfoxy » December 14th, 2017, 6:36 pm

:yth:


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Re: Yet another exhaust stack question.

Post by Rodcrafter » December 18th, 2017, 10:50 am

:LG:

That will work great!


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