Old fart getting frustrated trying to design an enclosure for my first system build in 10 years

[PooThenPee]

Hey guys,

I am coming back to this community as I have recently decided to get back into car audio. I have been running the same old type-r for 10 years and just recently ordered a 12" DC Level 3. I don't remember having this much trouble finding information and designing a box back in the day. I am looking to put this box directly on the backseat of my silverado ext cab. 

 

I want a ported box 1.5-17 cu ft with sub and port facing up. I have some numbers entered in torres (screenshot below) that I think is close but it won't give me the port cut sizes and am in need of someone who knows what they are talking about to let me know if it will even work. I have also mocked up these dimensions in sub box pro but the numbers don't quite match and I am frustrated it won't let me change the depth of the box. I feel like I am missing something and this is far more complicated than it should be so please help this old fart out. 

 

Edit: this design is meant as a normal box for a trunk that I would then just stand up on its back. So the height actually being the distance between the seats after flipping it up.

Edited October 14 by PooThenPee

[Never Enough Bass]

Sub box pro u have to play with other dimensions to get the depth

[PooThenPee]

22 hours ago, Never Enough Bass said:

Sub box pro u have to play with other dimensions to get the depth

Yeah I just wish I could change the outside dimensions to what I want then have it calculate the rest of it as I play with the dimensions and port dimensions. 

[Never Enough Bass]

Uea if u play with your port dimensions it'll change the depth and how many cu ft u need it to be

[PooThenPee]

So I think after some tinkering that this will be the winner. Appreciate the help.

[Never Enough Bass]

Looks good hope it works for u I personally bought a design from a professional