I appreciate all people trying to help, but the information given here is TOTALLY WRONG! I am a Fitneß und Nutrition Trainer so i know what i am talking about.
First for skinny guys who have a fast metabolism while dieting for fat loss an energy consum of 1600-1700 kcal for a weight of 167pounds is ideal. And while dieting do a refeed once a week, that means eat normal and whatever you like. That prevents the body from going into a safe mode
Second for gaining mass 3000 kcals are ideal, everything more is just going to be stored in fat. And losing this fat after is everything else than easy. You will curse for every kg!
Third an protein intake from 1,5-2gramm per kg weight (new Sport University study) is enough. Everthing more aint used for muscle building und can damage your kidneys if you dont drink enough daily.
Train hard, eat smart, sleep 7,5-9 hours daily and you will become impressive