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Q-talk *ON TOPIC ONLY* QUALITY ON TOPIC discussion of Backyard BBQ, grilling, equipment and outdoor cookin' . ** Other cooking techniques are welcomed for when your cookin' in the kitchen. Post your hints, tips, tricks & techniques, success, failures, but stay on topic and watch for that hijacking. |
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03-15-2010, 06:30 AM | #1 |
is One Chatty Farker
Join Date: 07-07-09
Location: Newark, OH
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Smokestack/Exhaust Size Question
I've got a question, and I've done a search on the forum but maybe I'm not searching on the right key words. I'm doing some mods to my smoker: insulating and double walling it, and turning it into a reverse flow. I've been using it for a couple years as a traditional offset, exhausting it through a 4" at the end furthest from the firebox and 2" at the end nearest the firebox, both stacks about 24" long. The tank dimensions are 5' long, 3' diameter, with a large offset fire box. So my question is: With my mods I am changing the location of the smokestack, is there a "rule of thumb" calculator that will tell me the diameter and length of my exhaust pipe to get adequate draft? Thanks for the help.
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- [B]Kevin[/B] Team: [B]Smitty's Real Pit BBQ[/B] KCBS CBJ [B]Superior SS-3[/B] - Courtesy of Gainesville Jaycees and Superior Smokers Custom Built Reverse Flow Stickburner [B]Weber[/B] 22.5" WSM [B]Weber[/B] 26.75" OTG [B]Weber[/B] Blue 2000 Stainless Performer [B]Weber[/B] Red 1998 Stainless Performer |
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03-15-2010, 06:46 AM | #2 |
is one Smokin' Farker
Join Date: 04-28-07
Location: South Bend IN
Name/Nickname : Mark
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I searched for smokestack dia ratio and hit on this. http://webpages.charter.net/tomchism...%20Calculator/
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Looking for the truth, in the thin blue smoke Weber Silver 22.5X2, UDSx2 KCBS-CBJ #16571, Member GLBBQA Roadmaster BBQ comp team Proud member of the Blue Thermapen Association Certified MOINKballer Class of 2008 |
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03-15-2010, 06:53 AM | #3 |
is One Chatty Farker
Join Date: 01-14-07
Location: Mount Washington, Kentucky
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Please post pics of your remodeling project. It would be interesting to watch and learn.
I would take a look at the reverse flow builders website and compare the size of your smoker to what they are building. Most of them have years of experience and would lead you in the correct way. There probably is a formula for smoke stack width and height to firebox size. It may be in one of the design books available. You might want to post the size of your smoker. jon |
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03-15-2010, 07:00 AM | #4 |
is One Chatty Farker
Join Date: 01-14-07
Location: Mount Washington, Kentucky
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http://webpages.charter.net/tomchism...;20Calculator/
This link is for calculating the firebox to pit size. This could come in handy for future projects. jon |
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03-15-2010, 07:04 AM | #5 |
is One Chatty Farker
Join Date: 07-07-09
Location: Newark, OH
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The size of the smoker is in my original post.
__________________
- [B]Kevin[/B] Team: [B]Smitty's Real Pit BBQ[/B] KCBS CBJ [B]Superior SS-3[/B] - Courtesy of Gainesville Jaycees and Superior Smokers Custom Built Reverse Flow Stickburner [B]Weber[/B] 22.5" WSM [B]Weber[/B] 26.75" OTG [B]Weber[/B] Blue 2000 Stainless Performer [B]Weber[/B] Red 1998 Stainless Performer |
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Thanks from:---> |
03-15-2010, 09:24 AM | #6 |
is One Chatty Farker
Join Date: 01-14-07
Location: Mount Washington, Kentucky
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Here is a link to calculate firebox and chimney sizes.
jon http://webpages.charter.net/tomchism...alculators.htm |
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