Final update: mechanical carbonation is the way to go.
I purchased a McCann Big Mac and have been topping up my soda base with carbonated water now for several months. Works perfectly. Filling it up through the liquid out port of my corny keg with the lid on. Using 30' of 1/8" braided...
I tried setting up a system with the big Mac but am having troubles. The water is flying out at a tremendous speed. It seems that any carbonation that might be in solution escapes from it being so turbulent when then filling a cup.
I use 30' of 1/8" tubing for the dispensing line.
Some...
Results - definitely has potential. Pretty close to how I would normally carbonate it.
Question now is how many volumes of CO2 concentration are most mechanical carbonation systems capable of pumping out? If any out there can get into the high 4s/low 5s this is most certainly an option.
Thanks for the reply.
I tried out a little proof of concept tonight. Chilled a keg of water then over carbed it. Let it chill again then opened the top and added in my flavour. My recipe is about 75% water.
It was all going fine then suddenly it exploded out of the keg! Made quite a good mess...
+1 for being interested in this as well. I have a small business making craft soda and am trying to scale it up. Right now doing the 'rock back and forth' method of forced carbonation but that's starting to be a lot of kegs every week.
Here are the options that I've been able to figure out...