kook

I want to know how deep and tall can the box be before it cant even go in the trunk. I built a box that is 38w x 15.5h x 16d, 16 inch depth is the biggest the box can go to simply be dropped in, any deeper then u would have to insert the box at an angle. So ya thats my question. I plan to make a 4-5 cubic foot box, if it could fit of course.

Pheonix

Tape measure.

Don't forget to leave room for the hinges to swing down.

ESPilot

I would suggest trial and error with cardboard boxes. If you can't find something big enough, take them apart, tape them together, and "make" your own custom-sized tester to get an idea. Have fun!

However, if you know trigonometry, you could figure it out given three dimensions: height of the trunk opening, depth of the trunk opening (front to back), and distance from the bottom of the trunk opening to the trunk floor.