Help with L7's enclosure

[snoop3111 10+ year member]

So Im building a box for my 2 L7 12's. Its going in a 2002 Jeep Liberty so I was planning on subs up port back. My max dimensions are H22xW40xD16 with about 5in of room between the port and back hatch. Im looking to build the box to 5.5ft^3 at 32-34Hz with about 80in^2 of port area. Im just having problems calculating my port size for the correct tuning and also finding the woofer displacement.

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[pro-rabbit 5,000+ posts]

I would increase the volume a little myself then increase port area.