Originally Posted by highchief
I do have another 7/8" hole drilled across from the inlet pipe, but have kept it covered up. There is so much available intake from the pipe that I don't think it's needed. Especially for a slow and low cook. Next round of upgrades the barrel gets I'll put in a threaded pipe with a cap on it. It'll be a good drain for when I occasionally hose it out, at least.
Yeah, you shouldn't need any more than the one vertical intake..
I've got a single 2 1/4 intake and 3" exhaust and it works fine.
I actually only have to keep the intake open about 3/8" to lock it in at 235..