The Finn returned to Ferrari ahead of the 2014 Formula One campaign after five years away from the Italian team.
Raikonnen has struggled to impress so far this term, collecting just 45 points, with his best showing coming in a fourth-placed finish at the Belgian Grand Prix in August.
But the 34-year-old feels he found some pace in his car during qualifying for the Singapore Grand Prix a fortnight ago, and goes into the remaining five races of the season confident he can challenge for the podium.
"In Singapore, we finally had the speed to put together a quick single flying lap in qualifying, as the car behaved the way I'd been hoping for," Raikkonen told Crash.net.
"It was just a shame we could not maximise the performance of the car because of a minor issue before the last flying lap.
"It meant we could not do much in the race, as I was stuck in traffic and couldn't exploit my pace.
"But for me, the positive thing that weekend was I finally had a good feeling from the car, something I had been waiting for a long time this year."