I eat between 135 and 150 gms of carbohydrates daily on SB, so not sure why you would believe there are "no carbs" available to you. Even in P1, which is only for 2 weeks, where there are no grains or fruits, you can easily get to 80-100 gms of carbohydrates per day if you include all your dairy, beans and vegetables.
There is no "normal" weight loss. You simply lose as your body is ready to give it up over time. It's a lifestyle program, not an on again/off again short term program to be used for specific events.
Good luck with that sugar busters thingie!!