Uhhhh... yeah, you definitely will want to prime it you will have no carbonation. But, to help you out we need to know which New Belgium beer you are cloning. Whatever style (or closest to one) that beer is a clone for could dictate how much priming sugar to use.
"A bad man is a good man's job, while a good man is a bad man's teacher."
Always prime. Bottling, I assume? Use 3/4 cup corn sugar per 5 gallons, or 5/8 cup regular white table sugar per 5 gallons, which works just as well and is cheaper.
Dave
"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)
Some would say yes. I would say no. I have brewed over 80 batches using volumetric means of priming sugar measurement for every one. I think measuring by volume is just fine. Go by what I said and you'll be fine.
Dave
"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)