Lotus are confident their Spanish upgrades will be worth a full second a lap around the Barcelona circuit.
Although one of the better of this year's newcomers, Lotus are still roughly four to five seconds a lap slower than the established frontrunners.
The team, though, is heading to Spain armed with several upgrades for their T127, which Heikki Kovalainen reckons could give them a significant improvement in pace.
"We hope to get a time gain of more than a second," he told Auto Moto und Sport. "But then perhaps we have more space in which to improve."
Kovalainen's belief in that second is echoed by tech boss Mike Gascoyne.
"The Barcelona package has been in the wind tunnel for six months," he said. "The rear will be narrower, the sidepod entries more extreme, the wheel base long.
"Our car will be faster by at least one second."
Source: Planet-F1