stick with 40%/40%/20% protein, carbs, fat as a percentage of total cals
bearing in mind that 1 gram of protein = 4 cals, 1 gram of carb = 4 cals, and 1 gram of fat = 9 cals
even for bulking i still think this is a good split, and i would recommend at least 2 grams of protein for every lb
when i bulk i definitely vary from that split, but i know how my body works, it responds well to loads of protein and i don't really put on too much fat, so i don't worry about that too much (i happen to be a complete mesomorph) this will vary greatly with each person
my suggestion is to figure out your maintence cals and go above that by ~20% and try to stick to the 40/40/20 ratio adjust as required