View Full Version : port question
09-20-2006, 01:41 PM
i was just wondering how you determine what size opening is best to use. i remember reading something about a 9:1 ratio, but what does this mean?
09-21-2006, 04:31 PM
09-21-2006, 04:37 PM
actually... take advantage of the search features please.
this will get you started: