"I honestly think playing at home for the first time this season will lift our side," McIlroy said.
To combat the strong and competitive North Harbour side, McIlroy said the Suns would need to play their fast-paced style of basketball, limit their turnovers and simply, play hard.
"For some of the games this season, some of the guys have shown up physically but not mentally ... The team bond seems to break in the third quarter but if we can stay disciplined for 40 minutes we have a good chance of beating any team," he said.
Like the Suns, Harbour Heat struggled in the Super City Competition, winning only their first game - which was against the Suns, also despite having several National Basketball League players and two Australian NBL players.
"That just shows how strong the competition is. This weekend, North Harbour are supposed to be bringing a line up that is potentially their NBL team, so they will be even stronger," McIlroy said.
The Suns will be without skipper Aaron Saddler, along with coach Sateine on Sunday, but Mata Cameron, who helped coach the Suns last season, volunteered to step into the coaching role for the home game.
Tip off is at 3pm at Kensington Stadium. Entry is $2 for adults, children 13 and under are free.
Northland Suns Squad: Travis McIlroy, Niasi Malua, Keeghan Saddler, Warrick Siddall, Carmen Hetaraka, Casey Namana, Justin Friedrich, Tolu Hetaraka, Harlyn Clunie, Kaea Samson.