Wallin my altima need help

[darkjds]

i plan on building a box outside my car and then boltin it down to a couple of 2x4s n seal from there, the thing is i wanna go with aeroports but my question is should i go with 2 6" , 3 or 4??? i always had an issue with the port area concernin aeroports

this is what i have so far:

any suggestions are welcome. thank you

[mrd6]

looks like you are planning 2 18s from box volume...you dont have nearly enough port area, double it at least. Also, when you start to need this much port area, generally lots of aero ports start to become less efficient than one big wooden port...has to do with turbulence and port surface area etc

[mrd6]

more info about yourset up would be nice to make a better recommendation

subs, amps, electrical, goals, etc

edit: is this in a sedan? and your trying to build your wall outside the vehicle and slide it in? I would make sure your doors are big enough for that before building anything...im guessing they wont be and you'll need to either build inside the vehicle or try something else

[darkjds]

2 obsidian 18 v2s on a alpine mrp-m1000 for now moving to a crescendo 2k later on, kinetik 1400 up front 800 in trunk big 3, just lookin to move a lil air dont care about numbers.

[stroupe79]

yeah...you are way short on port area...

[darkjds]

thats why im asking for help how many aeroports would i need since its not the same port area x foot as an slot..

[stroupe79]

try a large slot port across the top

make sure to mark 3 common walls

3x37 and then adjust the length to tune

[darkjds]

thats the thing im trying to stick with aeroports i like the look of them, unless it is impossible to accomplish the amount of port area i need.

[stroupe79]

your same dimensions with 4 6"aeros 17inches long puts you at just under 33hz tuning and 10.89cubes

I only used 17" ports since they sell them in that length as a standard size http://www.parts-express.com/pe/pshowdetl.cfm?&Partnumber=268-354&scqty=4

[mrd6]

If you insist on aeros I would do 6 6" but with the flares thats going to take up alot of space...part of the problem using aeros for things like this.

Or try using larger diameter pvc piping if you can find it and flare it yourself....I would shoot for around 160sq" of port at that tuning with those subs and power