Problems with oxygen flow on my new offset smoker

[Mattt85]

Thank you for the answers, on the weekend deff will have something to do , now i just done experiment on the bottom of the firebox i add 2 lines of bricks all the way up to the end, capaty by my calculation shrank up to 7900 cubic inch , and by bbq calculator size of the hole shrank to the right size and it still nothing not enought oxygen....

https://keisan.casio.com/exec/system/14407397595340

[Mattt85]

6 inch pipe fitted, not solving problem , next step lift the firebox

[hogaboomer]

Sorry. At least now you know it wasn't the chimney.

How are you going to cut the firebox off, grinder or torch?

You might want to think about installing some tuning plates while you're at it. Things are going to get real hot on the firebox side of your cook chamber, the tuning plates even out the heat across the whole cook chamber.





Phew, I need to get out there and do something with those ugly welds.

[Rambo]

Hey Matt, we’re having a contest in the Bbq throw down forum, go over and cast your vote

[Mattt85]

Yeah i have to cut it with grinder tommorow, after that if everything works fine, i will make some upgrade, just want to learn cooking on the offset. And its not working

[Mattt85]

Sorry. At least now you know it wasn't the chimney.

How are you going to cut the firebox off, grinder or torch?

You might want to think about installing some tuning plates while you're at it. Things are going to get real hot on the firebox side of your cook chamber, the tuning plates even out the heat across the whole cook chamber.





Phew, I need to get out there and do something with those ugly welds.

Why you got that big metal plate at the back of grill?

[Mattt85]

And if i dont lift firebox and just make 2 inch box on top does it make a trick? The air inlet will be bigger but the burning wood will be in the same level?

[hogaboomer]

Why you got that big metal plate at the back of grill?

I put that in there as a water tank, to make steam to keep things moist. I welded it all in, then I had to cut that big plate back off because the floor of the tank was leaking. I had tried to weld it with MIG and it was full of porosity that you couldn't see, but it didn't hold water. So I had to take the TIG and wash over the welds to bake out all the gas pockets. I welded over that ugly horizontal weld with TIG this morning, it looks a whole lot nicer, now.

[ReynoldsInTexas]

How does one calculate the area on a football cut, Kevin?

A tool created by an old friend on another forum I am on.
https://planetcalc.com/5155/

This is great. I was thinking about making a formula to post but this is even better! The formula would have been long & complicated I think.

[Mattt85]

Works perfect now , just need to make some mods, and cut the little sliding doors in the firebox openning. Thanks to all, without your help my offset have been gone to scrap yard :-)

[hogaboomer]

WOOHOO!!! You got it going on, now! Now put some meat in there.

May I suggest a digital thermometer to keep an eye on your heat?


I would cut that plate out of the bottom of the firebox and build a grate of some kind in there for your wood to sit on. That's obstructing your airflow, too. But, you say it's working, so what do I know. Rock on! The firebox is oversized anyway, so I guess it doesn't matter.

[Mattt85]

I just bought from camado easy bbq 6 probes, that plate at the bottom i will cut it out , because all the hot bits falling down and its hard to light up new log. Need to make heat plates aswell

[Mattt85]

What you think guys, can i install little air vent there?or where to install? I'm nearly there finishing touches

[hogaboomer]

I don't even use vents, I just leave the door cracked open some. Don't see why you couldn't put your vent there, though.

[Mattt85]

Ok i will try tommorow to control heat with firebox doors, if no good then i will install air vent.