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Old 10-15-2011, 02:55 PM
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Default Aero port distance from inside box question

So lets say I need an aero port to be 21" long, and the depth of my box is 23" deep.

Therefore the end of the port on the INSIDE of the box would be 2 inches away from the back piece of wood.

Am I OK with this, or is there a certain distance an aero port must be from any of the panels of the box?
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Old 10-15-2011, 03:05 PM
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I wouldnt go shorter than the diameter of the port.
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Old 10-15-2011, 03:05 PM
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I think your good if your port is a 4" aero
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Old 10-15-2011, 03:18 PM
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Originally Posted by jalm919 View Post
I wouldnt go shorter than the diameter of the port.
Now, I know that rule applies to the distance of the outside of the port, to say, the distance of my trunk lid. I wasn't sure about the inside...

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I think your good if your port is a 4" aero
Thanks for the vode of optimism. I'm hoping I'm good too...

And it will be 2 4" flared aeros to be exact...
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Old 10-15-2011, 03:21 PM
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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.
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Old 10-15-2011, 04:08 PM
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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.
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Old 10-15-2011, 04:12 PM
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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.
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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...
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Old 10-15-2011, 04:35 PM
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The rule is a diamater or a radius but really, just do it! For daily the very little shift in expected tunning is not going to be a big deal.

EDIT: Or just go along with what you said in your last post
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