Dry, as most would expect. No need to purge, keep checking jetting, run safety systems in case that fuel pump fails, no need to worry. What do you want, a system thats pieced together that should work good if you keep an eye on her, or a system that runs consistent, time and time again, that doesnt have a fuel pump, changes in elevation dont have an effect, that has been proven the most reliable system on the market since in introduction, Boondockers, and damn I should be a salesman for these folks, sorry. I run some of the longest hills in the U.S, have ran tons of nitrous through two stock motors, not a single problem, unless speed and satisfaction are problems. Good luck, all systems do the same thing as said earlier, just different approaches. Jed