need help with port size/box for 4 re sx 12"

[hemi=22s 10+ year member]

i got a 06 srt8 jeep cherokee on the way and want to build an enclosure for 4 12" re sx speakers facing up with port either in between them or coming out rear(facing tail gate) i only have experience with round ports and know i will need a square for these

i have 8.5 ft^3 net with sub disp. no port disp. factored in

should it be only 1 square port? and what size

what should the port size be this will be a daily listener occasional spl comp

where should i face the port ( port noise factored in)

i have 980bt premier deck/ audiocontrol spl160 meter, for in dash

2 optima yellow tops

0 awg kit wit isorelay,

eclipse 4 channel for mids 100x4

premier components 2 sets 6.5"

rockford 3.5" 2 ways for dash

already have factory amp bypass harness,

enough wire will be doing big three( with 0awg)

hifonics 3 way xover

2 mmats 2100.05

3 out of 4 re sx ( 1 not here from wlmccr yet off this forum:rage

3 trunk boxes of dynamat ( i will do whole car)

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[mjf 10+ year member]

sub up port back.

 

[hemi=22s 10+ year member]

thanks any recommendations on port size

what do yall use for bracing i usually use roofing brackets 3 per wall on 1" mdf and use heavy duty liquid nails for sealant

 

[amartin_72]

try to make that box a little bigger 2.25 each net with 120 inches of port on the whole box.

 

[hemi=22s 10+ year member]

120 inches on the port?, i oculd prob squeeze another ft^3 out of it, how do i determine port lxw and depth?

 

[hemi=22s 10+ year member]

what freq should i tune this box to and can some one give me an idea for port dimensions, length width and depth

thanks in advance