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Ramiro0727 01-07-2013 11:58 AM

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I'm building a few UDS smokers for some buddies of mine. I having trouble deciding which way I should do the lid. I'm thinking of drilling 8-3/8" holes on the lid. But as u can see by the picture I attached . The easier way would be to weld a smoke stack on the bung hole thats already there. Can you guys help me decide? Also posting pics of your lids well be greatly appreciated.

Skidder 01-07-2013 12:03 PM

Why not just get a 2" threaded pipe nipple and use that? Not that you even need it. A plastic cap from a spray paint can keeps the rain out too.

pwa 01-07-2013 12:32 PM

+1 I'd just screw in the 2" pipe and call it a day :-D


HookedOnQ 01-07-2013 12:34 PM

From the research i have done if u use the bung hole thats already there or just one exaust it creates hot spots and u will have to rotate ur lid to keep it even. if u do the 8 holes it will distribute heat better im in the process of building mine now for starters im using the 2in bung thats already there and if it doesnt work out i can go from there just my 2cents

jrn 01-07-2013 12:54 PM

I've layed that same pattern out on a lid just like yours. Take your hole plugs that came with the lid and screw them back in. At that point you can lay your holes out in a manner so as not to have any of your new holes landing on top of the 2 old holes. It's completely do-able. May have to try it a couple of times to get right. But that way you eliminate hot spot issues.

Also I would recommend going with eight 1/2" holes instead of 3/8".

jrn 01-07-2013 01:02 PM

As I look at your pic again, I realize my post might be a little confusing. You've got your 8 holes layed out, but they are not equally spaced. My point is its possible to lay them out, all equally spaced, and not be on top of any existing hole. I've done it!

One tip I might add is google "divided circle template". It helped me understand how to go about laying out the holes.

Jason :)

Ole Man Dan 01-07-2013 01:14 PM

I opted to drill eight 1" holes (No Hot Spots)
I got rid of plastic at bunghole and air hole.
I put metal plugs in those.

I took 1 1/2" long X 3/4" steel pipe and screwed on an end cap.
I drop one of these in each exhaust hole when not in use.

When I get ready to shut down my fire, I close my Intake pipes at the bottom of the drum with caps, and close the one valve
and drop plugs into the holes. Fire is smothered out quickly.

Skidder 01-07-2013 01:25 PM

Funny all the ones I made (16) so far work fantastic with the 2" nipple. Guess it's just personal preference. Both work

NU2QN 01-07-2013 03:29 PM

I have a 2" on my original UDS and have some cold spots. My most recent UDS has 3-3/4" pipe nipples evenly spaced on the lid. Some have said that is not enough exhaust however, my temps prove different. Here is a pic.

Ignore the thermometer, it was only there for the initial burn in.

pwa 01-07-2013 03:30 PM

Weber lids only have one opening and work real well. I haven't built as many as Skidder but I can't tell the difference between my first one with the 8 holes and or any of the others with bung's/ Weber lids. But it is personal preference :)

Good luck and welcome to UDS ownership

Ramiro0727 01-07-2013 03:55 PM

Thanks everyone for your input. After looking at the holes I have spaced. To evenly space them out . I can only get 6 holes instead of 8 . As my template I'm using a 14 " flange gasket. Well this work 6 holes instead of 8.

rondini 01-07-2013 07:31 PM

I've found that 2" bung w/nothing screwed into it works for just fine.

Skidder 01-07-2013 08:03 PM


Originally Posted by rondini (Post 2320654)
I've found that 2" bung w/nothing screwed into it works for just fine.

I agree!

Skidder 01-07-2013 08:05 PM

never understood why some think there's cold and hot spots. All my food cooks just fine. Guess some over think this cooker.heat it up,throw the food on and cook away

Ramiro0727 01-07-2013 10:40 PM

Thanks again for all who responded. I'm probably gonna drill 6 holes in the lids.

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