Can you have to good of a draw?

Horizontal smokers with a side firebox and tuning plates.
Post Reply
12ring
Just Got in trouble for buying tools
Just Got in trouble for buying tools
Posts: 44
Joined: June 10th, 2017, 8:07 am

Can you have to good of a draw?

Post by 12ring » October 16th, 2017, 10:43 am

I have another thread going on my build but I'll ask this question separately.

Pit info:

My CC chamber is 40" long 19" diameter. FB is 18" long 20" diameter. My opening from FB to CC is 13 3/4" long and 6" wide. A pit calculator called for my FB intake to have 15 1/2" sq inches. I went a littler bigger just to make sure it drafted well. The same calculator called for my 4" stack to be 20" above the CC. A few guys told me to go taller. Some guys recommend 36" and some 24". I split it and went 30". The distance from the top of my fire grate to the bottom of the FB/CC opening is 10 1/4". I have a slightly slanted 6" deflector plate and a 1 1/4" grease bridge.

Question:

Can the pit draw to rapidly? I lit a test fire last night to see where my leaks were and to watch the draft. Door seals leaked slightly but the pit was drafting way better than I expected. I had the intake open all the way. Light blue smoke was spiraling out of the stack and leaves 5-6' above the stack were moving from the pressure going upward. I had a fire bigger than I would be cooking with but what I noticed that concerned me was the flames slightly being drawn into the CC from the FB. I know the fire was to big but I'm wondering if maybe the height from FB grate to the opening isn't enough at 10 1/4" above. (Even though at this point I can't really change that) Or maybe it was doing exactly what it's supposed to do and my fire was just to big. Any info would be appreciated. ImageImageImage


Sent from my iPhone using Tapatalk



User avatar
Squiggle
Expert
Expert
Posts: 2611
Joined: December 19th, 2015, 5:04 pm
Title: Reformed non-smoker!
BBQ Comp Team Name: Not competing yet...
Location: Mole Creek, Tasmania

Re: Can you have to good of a draw?

Post by Squiggle » October 16th, 2017, 2:07 pm

I would say that is what you want, if you want to slow it down you can just close off the stack a bit. That's the best part about these units, you can play with it till you get the results you like(& yes DC, that's what she said, lol =)) )


Formerly known as "Hey you there in the bushes!"

User avatar
mp4
Expert
Expert
Posts: 928
Joined: September 2nd, 2014, 6:28 pm
Title: Independent Thinker
BBQ Comp Team Name: Just a few backyard for fun competitions.
Location: Central Wisconsin

Re: Can you have to good of a draw?

Post by mp4 » October 16th, 2017, 2:21 pm

Your fire is quite a bit more than I think you'll have when you're cooking and I think the draw will slow down with the smaller fire. I think it looks just right myself.



User avatar
Big T
Moderator
Moderator
Posts: 4847
Joined: September 1st, 2013, 2:40 pm
Title: Go Getter
BBQ Comp Team Name: Backyard Boys
Location: Lower Alabama

Re: Can you have to good of a draw?

Post by Big T » October 16th, 2017, 7:08 pm

:yth: and like Squiggle said, you can put a baffle on the stack and close it a little bit if you need to.


Measure Twice.....Cut Three Times.

User avatar
The Czar
Founder
Founder
Posts: 8187
Joined: May 22nd, 2011, 9:30 am
Title: Spam Hammerer
BBQ Comp Team Name: Team SmokerBuilder- Competition BBQ Team
I'm Certifiable
Location: Missouri

Re: Can you have to good of a draw?

Post by The Czar » October 16th, 2017, 9:37 pm

I treat my pit like I treat my women...

Squiggle...I’m just saying


Sent from my iPhone using Tapatalk Pro


If you can't fix it by sheer force or cursing......then it can't be fixed.....


AKA= The Czar

User avatar
Pete Mazz
Moderator
Moderator
Posts: 2645
Joined: February 16th, 2013, 8:19 am
Title: Meathead
Location: Bucks County, PA

Re: Can you have to good of a draw?

Post by Pete Mazz » October 17th, 2017, 4:51 am

Intakes are rarely wide open while cooking


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

Don't speak the language? Try this: Smoker Terminology

Try my SmokerBuilder Calculators

User avatar
Rodcrafter
Moderator
Moderator
Posts: 8344
Joined: July 21st, 2012, 5:46 pm
Title: Member
BBQ Comp Team Name: Not competing yet...
Location: Orlando, Florida

Re: Can you have to good of a draw?

Post by Rodcrafter » October 17th, 2017, 5:15 am

Yep I adjust mine to control temperature and flow.


Making memories!


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

User avatar
Squiggle
Expert
Expert
Posts: 2611
Joined: December 19th, 2015, 5:04 pm
Title: Reformed non-smoker!
BBQ Comp Team Name: Not competing yet...
Location: Mole Creek, Tasmania

Re: Can you have to good of a draw?

Post by Squiggle » October 17th, 2017, 1:03 pm

The Czar wrote:I treat my pit like I treat my women...

Squiggle...I’m just saying


Sent from my iPhone using Tapatalk Pro
Oh man, you are so my idol dude! ^:)^


Formerly known as "Hey you there in the bushes!"

Post Reply

Return to “Standard Offsets”