Originally Posted by kz650
A general rule of thumb is to have the port the diameter of it away from the inside wall. For instance if you have a 4" port it would be ideal to have it 4" away from the inside wall that it is loading off of. I think you should be fine though with it 2" away.
Originally Posted by taylorfade
From my experience, the port being that close to the inside wall will effect the tuning. It's going to lower your tune being that close. I'd split the difference and make the port 20" and 3" from the inside wall.
Or, unless you don't have room or just plain don't want it this way, make a few inches of it external.
Thanks a lot for the help and advice, guys. I'm just going to increase the depth of my box, being the ports will be firing rearward toward the trunk.
One final question I had is; if the depth of the a box is longer than the width of the box, will this have an adverse effect on anything?
For the record, I'm doing 1 15" up-firing in 3.2 cubes tuned to 30hz. Aero ports will be place on the driver side, firing towards the rear...