The smoke stack diameter is 7", and 51" tall.ThinBlue wrote: ↑August 19th, 2022, 9:50 pmI'll never be the guy discouraging someone from trying something new, but my hunch is that you will just push your hotspot further to the left because it looks like you are just delaying where the hot air exits. What you may get with that design it a dramatic reduction in the line-of-sight radiant heat that your meat will get directly from the fire. At the same time though the other thing I would be concerned about it restricting the airflow too much. I would think you would need a lot more smoke stack than normal to adequately pull in a sufficient amount of heat. Hopefully someone with more experience than I can weigh in on this for you.
Quick question for you. What problem are you trying to solve with this design?
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The top of the firebox is not be at grate level, grate is on 12,2" the top of the firebox is at 8,6", is that not a problem by airflow?Brewmaster wrote: ↑August 20th, 2022, 8:43 amIf you completely remove the lower half-moon with the 1,18" slot in it, it'll work perfectly! No boxed-in heat is required. Honestly, it'll work better without that piece restricting airflow. Best of luck!
Is already built, like on the picture. I would like to modify it because I am not satisfied.Brewmaster wrote: ↑August 20th, 2022, 6:16 pmI noticed your firebox is lowered a little in your drawing, which is fine but keep it to within maybe a couple inches. Plenty of builders install it a couple of inches or so below grate level, Franklin firebox is double-walled, so it's also installed below grate level.
Nothing wrong with directing the heat upwards if you want either but are you building from scratch or modifying something? Should be fairly simple to re-jig your plans to make it your own.
The higher your throat opening is the smaller the window is for that line of sight radiant coming from your fire.sinor81 wrote:The smoke stack diameter is 7", and 51" tall.
My plan was to reduce the direct, radiant heat, and transfer to the grate, however, I would like the airflow to be good.
Okay, I understand, thank you.ThinBlue wrote: ↑August 21st, 2022, 5:50 pmThe higher your throat opening is the smaller the window is for that line of sight radiant coming from your fire.sinor81 wrote:The smoke stack diameter is 7", and 51" tall.
My plan was to reduce the direct, radiant heat, and transfer to the grate, however, I would like the airflow to be good.
Just based off of that alone I think you would be better served to do something more traditional with your throat opening near grate level and then using an upward baffle to deflect the heat upward before hitting the grill grate.
Additionally, having the throat higher up will allow for the best possible airflow. Having it lower impedes airflow a bit because it will be fighting against nature. Having a higher throat allows you to have a smaller stack as well because it doesn't need to compensate for the restriction.
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I just removed the "heat box", what you see on the first drawing, and I'm thinking about the next stepBrewmaster wrote: ↑August 22nd, 2022, 7:29 amThat's pretty good firebox height placement, nothing wrong with that at all! You should almost be able to leave it as is, adding the shelf/baffle/plate above the grate, as it is in your first drawing. It's how Mill Scale and Franklin pits are setup.
How is the baffle/throat/box setup now? You mentioned you're not happy with how it's working, it'd be interesting to see what the current setup is. What are the other dimensions of the smoker? Chamber size and firebox size? Cheers
I think so too, i don't replace the firebox first, just install a "Franklin shelf", and I will try to make a removable upward deflector, and test it with both.Brewmaster wrote: ↑August 22nd, 2022, 2:44 pmIf I were you I'd just add the shelf/baffle Franklin/Millscale style and try it! Might work awesome as is with that mod. I don't think raising the firebox will make much difference, I mean we're talking about an inch or 2, it won't make a big difference, but it generally would have the effect of moving the hotspot further into the cooking grate, further away from the firebox. If that happens when you try it, the upward heat deflector idea will correct that.
I'm here with the modify...lower half-moon with the slot removed, "heat box" removed, I had to cut out the back of the cc to access the box.Brewmaster wrote: ↑August 22nd, 2022, 5:41 pmGood plan!
The calculators are more the suggested minimum size for the throat, but yours isn't that much larger anyways so it's fine. That said a grease dam is a really good idea! I built one with the grease dam doubling as the upward deflector to the grate, I wouldn't be cooking in that area so there was no real need for the dam to actually be choking the throat size down. We've built and modified a few, only one had the throat sized from the calculator, and it ran the fussiest. Always easy to add a dam though. Testing is required!
ThanksBrewmaster wrote: ↑August 24th, 2022, 5:11 amThat's some great work, you nailed it! That dam is dam sexy! Super cool logo in the firebox door, you should post more pics!
It'll be interesting to see if it needs the heat directed up or not. Btw I saw mention of the stack at 7" diameter, do you use a damper on it?
Setup with "Franklin baffle"Brewmaster wrote: ↑August 25th, 2022, 4:06 amWell she's looking good so far, good luck getting 'er done!
Very nice!sinor81 wrote: ↑August 27th, 2022, 11:53 amI just don't know when I can test it yet.Brewmaster wrote: ↑August 25th, 2022, 4:06 amWell she's looking good so far, good luck getting 'er done!