intended to tune higher. however, the hole in the bed was already cut from a previuos build and dont want to go bigger. tuning higher would require a shorter port (with current sqin), which would not extend into the cab of the truck. bigger port would work, but i'd have to recut and seal the bed again (PITA).
As far as unloading, I did a LOT of reading while planning and found that 5-8 sqin of port per cu ft of air is optimal for the rear chamber. I'm at 7.85 per.
Why would this unload?