I agree with csorrows, the FT-5, being an open frame printer, is not optimal for doing ABS. And yeah, the stock heated bed is not the best for good ABS adhesion.
ABS likes to be kept warm (as close to glass transition temp as possible) throughout the entire print time - very hard to do with an open frame printer.
as for PID settings - do NOT use someone else's numbers - EVER! - do a proper PID tune for YOUR machine. the PID numbers included in the firmware are just a base starting point - tuning them to YOUR specific machine is best practice.
If you do not know how, there are instructions available online - a search, or asking someone, will help get you going.