Anthony Davidson is confident BAR can overcome the reliability problems which hindered their testing programme this week.
Two Honda engine failures disrupted the Englishman’s efforts in Valencia but he was nevertheless happy with the work done in Spain.
He said: “We’ve done some good testing this week and I recorded my fastest time at Valencia in the 2005 car.
“We have done a lot of long run tyre testing which has shown positive results despite the weather conditions.
“We also worked hard on the balance of the car and made some big improvements over the four days.
“I have had a couple of engine issues but we hope to resolve these over the next few tests with more reliability testing.”