Toro Rosso will likely spend the Belgian GP on the back foot as Spa's high-speed profile will only underline the relative weakness of its engine.
While Toro Rosso engine partner Renault has made progress this season its power unit still remains at a fair distance from rivals Ferrari and Mercedes.
As a mid-field contender, the Faenza-based outfit will undoubtedly have its work cut out for it as it visits back to back power tracks Spa and Monza.
"Mid-fast and mid-slow corners are where our car is working quite well, where the engine is not the priority as it is in Canada, Austria, Baku or Silverstone," says team boss Franz Tost.
"I expect once we are in Singapore, America, hopefully also Japan we will be will be quite competitive.
"I expect problems in Spa and Monza because they have such long straights where you simply need the engine power and we all know that we are down there a little."
Unfortunately, budget constraints will also limit Toro Rosso's potential for development in the second half of the 2017 season. Yet Tost is hopeful the team's performance relative to its rivals won't suffer from a significant drop-off.
"We've upgraded the car, we made some progress, but we are also from this end budget limited," he said.
"We cannot come up like the top teams every race with a lot of upgrades because they have three or four times the money of us.
"We really have to calculate always what we do, how we do it, and so far, I must say we have done a reasonably good job."
Gallery: The beautiful wives and girlfriends of F1
Keep up to date with all the F1 news via Facebook and Twitter
Former McLaren boss Ron Dennis and ex-F1 driver Martin Brundle both celebrate their birthday on…
Alex Palou continues to rewrite the IndyCar history books, surviving a chaotic, full-contact Chevrolet Detroit…
Jenson Button has never been short of admiration for motorsport’s greatest endurance tests – but…
Formula 1's simmering debate over multi-team ownership could be heading toward a defining moment –…
If there is one man who knows what it takes to survive the sport’s unforgiving…
The F1 machinery at his disposal this season is clearly lagging, but the self-belief fueling…