What software and slicer are you using?
Also are you printing at lower speeds?
Finally what filament?
I use Simplify3d, printing the same with 100% infill .2mm resolution.
I typically print at 80mm/s and I get prints of this item at less than an hour. I dont know if its because I use a Kossel, but my other printer (FlSun Prusa I3) Still getting roughly one hour.