Young strikers David Mooney and Cody McDonald helped the Canaries rip the form book to shreds with an impressive victory.
Gunn now wants to see the relegation-threatened Canaries maintain the momentum for the remainder of the season starting with Saturday's home match against fellow strugglers Plymouth.
"That's exactly what I asked for from the players," said the Norwich boss, whose side had slipped five points adrift of safety after a dismal 2-0 defeat at Blackpool on Saturday.
"When you look at the Blackpool performance sandwiched in between a great win at QPR and another one tonight, you do scratch your head.
"But there's no point looking back now, it's about looking forward.
"We have got to maintain that level of commitment and performance for the rest of the season, starting with another very important game against Plymouth on Saturday, and if we do that we'll have a chance.
"It was a great win tonight and we'll all enjoy it but it will soon be a question of getting everyone's feet back on the ground again and start preparing for the next game.
"We've now set the standard and we've eight games left and 24 points to play for. We have got to keep it up."
Gunn had words of praise for the two goal scorers, saying: "It was a dream debut for Cody and I'm delighted for him because he has been like a breath of fresh air since coming to the club.
"He's a real livewire in training, and always gives the other players a headache with his enthusiasm and he thoroughly deserved his chance tonight.
"I'll probably have to get him down from the clouds, but I'm sure he'll be ready for the next game.
"David came over from Ireland with an excellent reputation for scoring goals and you could see what he was all about tonight.
"We owe Steve Coppell a debt of gratitude for letting him come here on loan, but hopefully Steve will benefit as well with his player getting games and scoring goals."
The Canaries took the lead four minutes after the interval when Mooney took advantage of a dreadful error from Cardiff keeper Dimitrios Konstantopoulos, who kicked thin air after realising he was too far out to gather a through ball from Wes Hoolahan.
Norwich then made the game safe in injury time when McDonald sprung the offside trap before rounding the keeper and slotting in Norwich's second.
Cardiff manager Dave Jones felt his side could have no complaints about a second successive away defeat against a side struggling at the foot of the table.
"It was a very disappointing performance," he said. "We never really got going and handed the initiative to them with a really poor first goal.
"It was a nothing through ball that should have been dealt with but Dimi hesitated when he should have put his boot through it and their player nipped in to score.
"The second goal was also poor because it was another nothing ball that we should have defended but for some reason we tried to play offside.
"Overall the players did not perform nearly as well as they can do.
"They were lethargic, made too many errors and didn't create enough.
"Teams down the bottom will always make life difficult for you if you don't get it right yourself and that's what happened tonight.
"But there is still a long way to go and we are still chasing hard."