First Build - Octagon pit

Custom manufactured BBQ Pits, Do-it-Yourself projects, parts and ideas.

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k.a.m.
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Re: First Build - Octagon pit

Postby k.a.m. » Sat Jul 11, 2020 6:41 am

This is a Jambo.
DSCF1471.jpg
Always remember slow and steady wins the race.



My Hybrid cooker.
Competition trailer #2.
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k.a.m.
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Re: First Build - Octagon pit

Postby k.a.m. » Sat Jul 11, 2020 6:42 am

Exhaust end.
DSCF1470.jpg
Always remember slow and steady wins the race.



My Hybrid cooker.
Competition trailer #2.
AG.AUS
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Re: First Build - Octagon pit

Postby AG.AUS » Sat Jul 11, 2020 7:44 am

Thanks [mention]k.a.m. [/mention] ,
Going by that design, there wouldn’t be any tuning plates (nothing to tune...)

Mmm more to think about..

Thanks for the photos...
:)

A


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Re: First Build - Octagon pit

Postby AG.AUS » Thu Jul 16, 2020 2:08 am

Hi all..

Got a bonus day today to get some more done on the smoker..

With [mention]hogaboomer [/mention] questioning my small chimney (and I too wasn’t overly convinced with such a small volume / smoke capacity)

I have decided to remove it.. going to go with a 100mm square chimney (close to being similar in area comps to 4” tube) and to push it higher up the side wall, closer to the top edge..

So with this new trajectory, I had to fill in some time.. so knocked up :
* small foldable shelf (outside smoker)
* 1” square tube handle
* cooker wooden handle
* welded lots of seams.. grinded down all the edges..


Hopefully I will be able to get some more time on it and also be able to buy more stuff before we go into lockdown (rumours indicating we may..)

Image

Thanks

Andrew


Total Hours - 30h
Total Cost $ 940AUD


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hogaboomer
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Re: First Build - Octagon pit

Postby hogaboomer » Thu Jul 16, 2020 10:04 am

Good choice, that should work better. I tried putting a restrictor plate in my oversized 9 inch pipe smoke stack, just a plate I had laying around with a 5-1/2 inch circle cut out of the middle. This morning I lit the fire and too much smoke was coming out the firebox door, so I pulled that plate out right away. I just had it jammed in there for testing, maybe I'll make the hole bigger, maybe just leave it out altogether. This thing cooks pretty nice with that gigantic stack.
I jast saw your total cost so far, whew!!! Stuff is expensive down under! Looking good, though.
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Re: First Build - Octagon pit

Postby AG.AUS » Fri Jul 17, 2020 1:25 am

Haha..
Yeah, considering we dig the stuff out of the ground.. steel should be cheaper! Ha

Plus I have had to buy it in smaller quantities (as I go, compared to a huge big order) but I’m having fun learning and fabricating..

Still going to be cheaper than buying a decent offset here.. (yoders are about 2-3k)

As long as I finish up with something which cooks decent food, I’ll be happy, as so will my wife!

Then again, I’ve spent ~$940 AUD so comes to about $650USD..
Not too bad...


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Re: First Build - Octagon pit

Postby AG.AUS » Fri Jul 31, 2020 2:38 am

Hi all,

After finally getting another few hours to work on this pit, I’m slowly getting somewhere!!
(Might get it finished by Christmas!) haha

Installed the new ‘larger’ chimney with collector 100mm square tube (4” sq)

Currently sitting installed at about 450mm (17.5”) abit longer than on the calculator, but trimmable down to probable length ~15” if its not flowing properly..

Image


Also got onto the second skin of the firebox + some insulation added (only 1/2” gap.. might not make much difference, but worth a crack)

Image

Image


Including the twin FB air intakes 75mm x 50mm (3”x2”)


Next to do is the finish the FB main door.. (with insulation)

Grind all the v.poor welds.. (I should really stick to my real job..! Haha)

Then continue on with the full list..

* cut the uprights to support FB from the base trolley.
* install tuning plate supports & angled baffle (to direct smoke down)
* build/design a chimney cover/baffle
* install main cook grate supports
* design and install top cook grate
* weld everything and grind everything.
* paint and add gaskets

Debating in my mind how to ‘lighten’ the cook box lid.. (either counter weight or a few industrial springs to reduce the weight as it closes down)



Thanks for reading

Andrew


Total Hours - 36h
Total Cost $ 1,050AUD


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Boots
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Re: First Build - Octagon pit

Postby Boots » Fri Jul 31, 2020 7:31 am

Good on ya Mate. Coming along. KAM is a builder too and can help.

Am +1 on the oversized firebox. You’ll never regret too much capacity, but will curse it to Hades if you don’t have enough.

And looks like you have an Autocad program. Envy!
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Re: First Build - Octagon pit

Postby 02ebz06 » Fri Jul 31, 2020 9:06 am

Amazing project. I applaud you efforts. :salut:
Very nice write-up of the build.
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k.a.m.
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Re: First Build - Octagon pit

Postby k.a.m. » Fri Jul 31, 2020 9:33 am

Looking great Sir. :salut: :salut: :salut:
I am a fan of mechanical weights and door stops. I like to build a sampson post and use a pulley and cable. But fixed weights work too and are less labor intense. Getting the weight right is the tricky part as you really only want about 10% to 15% of the door weight on the weight. It is an assist not a lifter.
Always remember slow and steady wins the race.



My Hybrid cooker.
Competition trailer #2.

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