Kimi Raikkonen says there is no "magic" solution for Ferrari as it strives to close the gap to leaders Mercedes in the championship.
Ferrari held hopes of fighting for the title in 2016 but has yet to win a race this year and trails Mercedes by 67 points, while it has only a nine point buffer back to rivals Red Bull.
Ferrari has brought an updated turbocharger to this weekend's Canadian Grand Prix but Raikkonen says the upgrades will not enable the outfit to make a surge up the grid.
"This is a step forward," he said. "How much, time will tell. It’s a new part and we would never put any new parts on the car if we didn’t think it improves, but is it going to be what kind of step?
"I don’t expect any miracles suddenly but it’s the right direction and it’s something that’s been for a while that we’ve been waiting to have it.
"It’s more like any other new parts we bring, it’s not suddenly something magic, so it’s a very normal work in progress for us as a team, as Ferrari, and it’s going in the right direction all the time."
Raikkonen also insisted that Ferrari is performing better than what has been reflected in the results.
"We know what we’ve done, we’re definitely more strong in the car and other areas than we were last year,2 he explained.
"Maybe the results haven’t showed it exactly, but it’s not been the easiest start for us as a team, but we know that as long as we do our stuff and keep working it will pay off.
"As I say, it’s not been what we’re looking for exactly, but the package has improved and we’re working on that all the time. We know our weaknesses and where we have to improve.