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Old 10-03-2012, 05:45 PM   #1
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Join Date: 09-07-12
Location: Los Angeles, CA
Default Is the "chimney effect" just a myth?

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...
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