Ferrari are likely to spend a few engine development tokens ahead of their home race, the Italian GP, but team principal Maurizio Arrivabene has warned not to expect a "super engine".
Although Ferrari have improved since using three in-season development tokens ahead of the Canadian GP, there is still a gap between themselves and Mercedes in terms of their power units.
The Italian outfit, though, will be looking to move even closer to the front-running Merc at the high-speed Monza circuit by using more tokens, but Arrivabene remains cautious.
"We are working, but in Monza there will not be a "super engine," he is quoted as saying by Motorsport.com. "We could spend some tokens, but they will be very few.
"So it is not worth talking about a super power unit, only an engine."
Ferrari didn't have the best of weekends at the Belgian Grand Prix with Sebastian Vettel only ninth fastest in qualifying while Kimi Raikkonen failed to make it out of Q2 due to a mechanical problem.
Although Vettel had a solid race on the Sunday and was running third before his tyre blew out, he was still several seconds behind the two Mercedes cars.
"You know very well that the characteristics of Monza are similar to those of Spa," Arrivabene said. "So they are less well suited to our car.
"This is not to say that we will throw in the towel and run away refusing to fight: we will go there trying to do our best. But we know we go there not being the team to beat.
"For that I'm sorry because it is the Italian Grand Prix, but I want to be realistic. I'm not going to delude the fans, so I prefer to say it like it is.
"If we could somehow pull a rabbit out of the hat I would be delighted, but we will not be the point of reference."