Sauber is confident that an engine upgrade from Ferrari for this weekend's Belgian Grand Prix will enable it to make progress as Formula 1 returns from its summer break.
Sauber began the season with 14 points in Australia but added only a further eight to its tally across the following races, as it slipped back through the pack.
Ahead of aerodynamic updates arriving in Singapore, an engine upgrade from Ferrari will be fitted to the C34 at Spa Francorchamps
"The Belgian Grand Prix can be considered the opener of the second part of the season, in which Sauber is looking forward to stronger performances thanks to a number of upgrades that will be progressively introduced," said head of track engineering Giampaolo Dall'Ara.
"At Spa both C34s will be fitted with more powerful Ferrari power units and track specific wings.
"The track is an all-round favorite and demands high-speed cornering performance and straight-line speed, hence aerodynamic efficiency and power output.
"Traction and braking, although, as usual, important, are second to stability and reactiveness, therefore rather specific set-ups are being worked out."