So I bought a Skar Zvx8 a few weeks ago and I figured I would make a box for it so I started to look online for ideas and dimensions and only found two boxes that were sold online for it, one made by life after bass in California and another on eBay that had a reflex tube so I decide to mimic the one from life after bass since they had the dimensions on the page, well I got it all sealed and ready to go inside an f250 and when I hooked it up it really didn’t sound that good but I think it has to do with my port length. So now I might just have to make a new box but can anyone help me out on trying to figure out what the port length should be for about 33hz, not trying to mass produce these by the way I’m just trying to see how hard this thing can hit and not have to pay $160 for a box, I eventually want to try and squeeze it into a center console

