Will a homemade bong always need a carb?

So I made a bong out of a 1 liter Coca Cola bottle, cut a almost perfect sized whole for my downstem then taped it up so it is near airtight around a sharpie pen body that I used for the downstem, then I took the sharpie cap cut it in half flipped it over and it fits together perfectly for a bowl piece that I can take off because the writing side is out of the bottle, now I do have a hole on the back that is taped up but I have it so I can easily take it off without problem, I am not worried that the weed will fall through because the bowl peice is perfectly sized, but do I need to untape the carb when I take of the bowl cap piece it allows more air to flow through but will this work without the carb.