Sunderland are now just one point from a play-off position and the Black Cats have gone from strength-to-strength under the Irish leadership of Quinn and Keane.
While Sunderland's away support has been un-imaginable this season, their home support has been quite irregular to say the least.
Quinn said: "The momentum is starting to gather pace and we need our fans to get behind the team, in numbers.
"Now is the time for those who may have wavered in the past to stand up and be counted and back what we're trying to achieve here.
"We need to send out a statement of intent to teams coming to the Stadium of Light - the crowd made such a difference at Sheffield Wednesday and I'd like to see that replicated on home turf.
"With three massive home games coming up - against Crystal Palace, Coventry and Southend - the support is more vital than ever.
"The club needs the fans and now is the time to make some sacrifices and back your team."