DustinBolt Posted April 1, 2012 Report Share Posted April 1, 2012 About how much porrt area would you recomend for a fi ssd 12 in a 4th order bandpass box and about what tuning? Quote 1997 BMW 528i Fi ssd 12 6th order box Build Log- http://www.stevemeadedesigns.com/board/topic/144835-rebuild-in-the-bmw-6th-order-time-update-1113/ Link to comment Share on other sites More sharing options...
JeepGuy Posted April 1, 2012 Report Share Posted April 1, 2012 How many cubes is the box? Also what ratio are looking for? typicaly you will want to tune between 45 and 50 hertz. With the port area part, I usually go with 18 sq in of port per cube. Quote - 1995 Jeep Wrangler - ALL UNDER MASS TRANSFORMATION! Link to comment Share on other sites More sharing options...
DustinBolt Posted April 1, 2012 Author Report Share Posted April 1, 2012 a 2:1 or 3:1 about 2 to 2.5 on the ported side after dispacements. with an external port. Right now i have a 2:1 with 30^2 inches of port, and about a 42 hz tuning and i think im having some problems with air noise on lower notes. Quote 1997 BMW 528i Fi ssd 12 6th order box Build Log- http://www.stevemeadedesigns.com/board/topic/144835-rebuild-in-the-bmw-6th-order-time-update-1113/ Link to comment Share on other sites More sharing options...
JeepGuy Posted April 1, 2012 Report Share Posted April 1, 2012 r u using a external aeroport? I think you need more port area if you are getting port noice. Quote - 1995 Jeep Wrangler - ALL UNDER MASS TRANSFORMATION! Link to comment Share on other sites More sharing options...
DustinBolt Posted April 1, 2012 Author Report Share Posted April 1, 2012 its got about 3 inches external. the rest internal. Quote 1997 BMW 528i Fi ssd 12 6th order box Build Log- http://www.stevemeadedesigns.com/board/topic/144835-rebuild-in-the-bmw-6th-order-time-update-1113/ Link to comment Share on other sites More sharing options...
JeepGuy Posted April 1, 2012 Report Share Posted April 1, 2012 what size aeroport? Quote - 1995 Jeep Wrangler - ALL UNDER MASS TRANSFORMATION! Link to comment Share on other sites More sharing options...
DustinBolt Posted April 1, 2012 Author Report Share Posted April 1, 2012 its not an aero sorry its a 3 by 10 rectangle firing through ski hole in back seat. the port blocks alot of the middle of the ported box, could this also cause noises? Quote 1997 BMW 528i Fi ssd 12 6th order box Build Log- http://www.stevemeadedesigns.com/board/topic/144835-rebuild-in-the-bmw-6th-order-time-update-1113/ Link to comment Share on other sites More sharing options...
JeepGuy Posted April 1, 2012 Report Share Posted April 1, 2012 Well how far internally does it go into the box? How far is the port away from the back wall? Quote - 1995 Jeep Wrangler - ALL UNDER MASS TRANSFORMATION! Link to comment Share on other sites More sharing options...
DustinBolt Posted April 1, 2012 Author Report Share Posted April 1, 2012 port goes all the way to back and then turns away from the sub. Quote 1997 BMW 528i Fi ssd 12 6th order box Build Log- http://www.stevemeadedesigns.com/board/topic/144835-rebuild-in-the-bmw-6th-order-time-update-1113/ Link to comment Share on other sites More sharing options...
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