(To Juicing Folks) How much carrot juice does your juicer produce?

I am trying to analyze the juicing output of masticating juicers. I am planning on starting juicing and Uny has told me juicing is the thing to do while on the Schulze foundation program. This info would help me a bit:

(1) Those of you who have juiced carrots, can you tell me how many ounces of juice can you expect by juicing around 2 lbs of carrots? Please mention your juicer name.

(2) How much carrot juice would you recommend to be taken per day?

(3) Do you have any tips for increasing the output in masticating juicers? (general tips, not specific to any juicer)