Originally Posted by Heisenberger
Hello Brethren. I have a question about my UDS exhausts. Will threading the 8 holes in my lid with nipples create any chimney like effect (if that exists), or is it exactly the same as just having the holes bare. Does having a chimney actually "draw" the air/smoke out? Maybe this only happens if the chimney is a certain length.
I'm debating whether I should thread the holes with a pipe plug to close it off, or just install the nipples and use caps for cutoff...
It's actually called stack effect and it is real.
You can read about it on Wikipedia. I'd drop a link but for some reason the forum won't let me. I keep getting an error