Lotus duo Romain Grosjean and Pastor Maldonado believe that the team has been negatively affected by the removal of the Front and Rear Interconnected Supension System [FRIC].
With teams unable to reach a deal over FRIC, it was decided that the system would be removed from cars for this weekend's German Grand Prix.
While rival drivers do not believe that the changes have made a difference to the pecking order, Grosjean and Maldonado both feel that the E22 has been harmed by its removal.
"We’re still not quite where we’d like to be; it’s not ideal to be out of the top ten but the car doesn’t feel too bad," said Grosjean, who will start the race from 14th position.
"We’ve just lost some downforce. The team were one of the first ones to use the interlinked suspension system so removing it is a big change."
Maldonado will start from 19th on the grid.
"We are still working on gaining back some of the performance we have lost from the changes to the suspension," he said.
"I think we can recover this pace, but it’s certainly affecting us. It’s a case of looking at every detail of how the suspension works without being connected as it was before and how this affects the aerodynamics. We’re working hard to put everything together and we should gain a few tenths that will put us back into fighting position."