Lotus technical chief Mike Gascoyne believes that upgrades made in time for the Spanish Grand Prix will give his team a significant performance boost in comparison to their rivals.
"All the teams will have upgrades for Barcelona, but we're hoping that ours is even more significant than our rivals because we received our entry so late and had to freeze the initial specification of the car very early in the design process," said Gascoyne.
"We do expect it to be reasonably significant - we have an aero package with revised sidepods, front wings and brake ducts, and a number of mechanical changes, but obviously we'll have to wait and see what step forward our rivals will also make.
"It's very gratifying to see the whole factory in full operation, with every department now nearly fully staffed but starting to work to their full potential. This means we can now look at more long-term development and R&D programmes, and start thinking about future cars. We're through the hardest part of the team's growth and we're on a very good footing for the future."
Team boss Tony Fernandes echoed Gascoyne's optimism, saying he was delighted with the start to the season and looking forward to the next stage of development.
"We're back in Europe and I couldn't be more pleased with the position we arrive in. The first phase of Lotus Racing's life is now behind us, and the next challenge starts here.
"We've proved all the doubters wrong, and have shown that the hard work everyone in the team puts is making the dream we share come true."