Rubens Barrichello has stated his belief that this weekend's British Grand Prix at Silverstone will give Williams a good indication of how it will perform through the remainder of the F1 season.
Barrichello took his best finish of the season by far in Valencia as he secured fourth place, while team-mate Nico Hulkenberg joined the Brazilian in making it through to Q3 before being forced out of the race late on with an exhaust issue.
Williams is due to introduce a series of new upgrades for its home race this weekend and Barrichello said the British GP would give a better indication of Williams' chances through the rest of the year.
"I could be very positive and I could say 'yes, this was not just because of the track', but I would rather keep my feet on the ground and just wait for Silverstone," he told ITV-F1
. "Silverstone is a very different track, one that I love very much, but it's high speed, although it's a new circuit and I've seen in MotoGP that you have some slow-speed.
"If we perform the same way, or even better, at Silverstone, I think we're going to perform better all the way through."
An exhaust blown diffuser, rear brake duct and front suspension changes will also be trialed during Friday practice – with a final decision then being taken on whether to continue with the exhaust through the remainder of the weekend – and Hulkenberg said he was hopeful that the improvements would allow the team to again challenge for strong points finishes.
“We have another update coming for Silverstone,” the young German said. “Others will probably be doing the same, so we will have to work hard to keep the momentum going and stay in the top ten. It's a massive positive that we continue to have new developments in the pipeline. It's always good to know that everyone in the factory is trying hard to develop the car in order to move forward.
“I have spent some time at the factory learning Silverstone's new layout in the simulator, but it will be more interesting to see exactly what they've done when we get there. As I've lived in Oxford for a while now, and because it's just down the road from Silverstone, I kind of see the British Grand Prix as my second home race. I'm looking forward to getting started as I have unfinished business from Valencia.”