Finished mu UDS this weekend :grin: and cooked on her twice...My problem is I do not think I have enough draw. :eusa_clap

My build: I have eight 3/8 holes in the lid and four 3/4 inch pipe (2 inch long) intakes. The intakes are inserted so that most of the pipe is in the drum no elbows or anything. I had to leave all 4 intakes wide open to get the temps to hit 230-250 and on occasion I had smoke coming out of the the bottom intakes (not being drawn to the top??). And even with one small chunk of wood the smoke was pretty strong (stale smoke not being able to leave the cooker fast enough??)

I had to crack the lid about a inch or more to get close to 300 for the chicken I cooked. Wide open with the lid on it would hold at 250 pretty well but I noticed that with all 4 intakes open like that the wind would really affect the temps and with them all the way open to get to 250 on a 96 degree day I am pretty sure I will have a hard time getting this thing up to temps on a cool day.

So now that Ive rambled on and on here is my question...I believe from my reading that most of the UDSs with eight holes in the lid have 1/2 holes, mine are 3/8, so having holes @ 3/8 inch I have lost 8/8 or 1 inch of air vent. (Correct?). The holes are centered in a circle ala the BDS and I thought about drilling 4 more hole outside of the main circle say one at North, South, East and West so that i would have the 8 main vent hole and four other holes closer to the outer edge of the drum.

Do all you drum gurus think I should punch the existing holes to 1/2 (or larger) or can I add the extra four 3/8 inch holes? Would more holes or bigger holes draw better? Any ideas? To finish off the build My charcoal grate is 2 inches off the bottom the cooking grate is 6 inches from the top, any lower and it would have been closer then 24 inches from the charcoal grate. I con not use the weber kettle lids because the drum is too wide, without the handles and legs the entire kettle will fit inside the drum.

I need to get his figured out so i can do a brisket and a few butts in it on the 4th of July so I can also do some ribs on the Hondo!

Thanks
 
I think either way of opening up the exhaust holes (adding or enlarging) should solve your problem. That is what I did with mine. I started a fire (no food) and let it burn and kept opening up exhaust holes until I had plenty of draw. It isn't pretty, but it cooks very well.
 
I agree stx cue. You need to open your exhaust holes to 1/2". That should make things work a lot better. It works well on mine.
 
one exhaust hole 2.25 dia. works great , held 210-225 for 10 hours on about 2-3lbs of charcoal briquettes

MySmoker011.jpg
 
Is there a reason why drilling the bottom holes and then covereing each hole up with something wouldn't work as well as putting in the valve thingys at the bottom? I am trying to do this on the cheap, but I want to make sure it works right too.

BTW major thanks to HoDeDo who hooked me up with a drum!! I'll try to do ya proud!!
 
Is there a reason why drilling the bottom holes and then covereing each hole up with something wouldn't work as well as putting in the valve thingys at the bottom? I am trying to do this on the cheap, but I want to make sure it works right too.

BTW major thanks to HoDeDo who hooked me up with a drum!! I'll try to do ya proud!!
Magnets have been working great for quite a few. Check WHL3 post.
 
I pretty much did exactly like you did in the link Norco except my holes are/where smaller :) and closer to the center of the lid...I can not move the holes but I can/did make them bigger. Also my nipples are longer but I don't think that has much to do with it, but I could be wrong.

Old hole size pic...
uds23432343234524.jpg
 
My feelings on smaller (shorter) nipples is that it makes cleaning/scraping bottom easier.
 
My feelings on smaller (shorter) nipples is that it makes cleaning/scraping bottom easier.


Amen to that, I already learned that little lesson...but if my new larger holes help with the draw I will leave it as for the time being, until I build my next one. I already have 3 more barrels! :-D
 
I pretty much did exactly like you did in the link Norco except my holes are/where smaller :) and closer to the center of the lid...I can not move the holes but I can/did make them bigger. Also my nipples are longer but I don't think that has much to do with it, but I could be wrong.

Old hole size pic...
uds23432343234524.jpg

Enlarge them holes and it'll run a lot beter for ya!
 
I never know if i should do my own UDS thread or keep adding to this monster, good thread. Its almost a right of passage to read it all.:icon_bugeyed
So...
New BIGGER 1/2 inch holes, if its still not enough I will add 4 more closer to the outer edge of the drum...

lidfghbn316.jpg


Inside...in real life its not this blurry...

insidefgtrf174.jpg


The whole enchilada, the cart idea was stolen from someone on here. (sorry I do not remember who)...

allwedfrtg937.jpg


I still need to decide if/what color I am going to paint it, as of right now its got oil on the outside. My daughter whats to to a flame job on it but I kind of like it Ugly. :cool:
 
Kidcurry, with enlarging your 8 holes to .5' you will equal one 2' opening. The 2' exhaust works well on mine.
 
I decided to try building my first UDS after running across this forum while doing a search on google for a DIY smoker. I'll post pics of my buildup once the drum gets here, and hopefully this can help someone else out as well. I went through 60 pages of this thread, and well most if not all my questions were answered.
 
Man I wish I had seen those photos before I built mine, Norco. Mine turned out well, but I would have done some things differently for sure!
 
I have a question that will hopefully DRUM up some more UDS conversations...

I found some more Drums because my brother-in-law wants to build one now as well, but they are sealed at both ends. I was reading a post on here about some one cutting off the lid, but my question is... Do I then have to go with a Weber lid, or can i put the cut piece back on it?
 
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