“We showed a lot of character and team spirit tonight. Since converting your first chance off the bench is never easy, I take my hat off for Demba Ba,” Bilic told the official Beşiktaş website.
Bilic switched formation on 57 minutes bringing on Demba Ba for right-back Daniel Opare and changing to a 4-4-2 setup from a 4-2-3-1.
Gökhan Töre made a well timed pass across the penalty area that found Ba just one minute later.
The Senegalese international striker found the bottom corner with a powerful effort to open the scoring.
Ba has reached a career high in terms of goals scored in his first season at the Black Eagles.
Ba joined Bursaspor striker Fernandao as the leading Süper Lig goalscorer, both forwards have now hit the back of the net 17 times this season.
The Senegaelse international has a total of 25 goals and seven assists in all competitions since joining from Chelsea in the summer.
The Istanbul giants moved into first place in the Süper Lig standings following the win, one point ahead of second placed Fenerbahçe.