Williams plans to take several upgrades to this weekend's Turkish Grand Prix in an effort to change its fortunes after a difficult start to the 2011 F1 season.

The team heads into the first European event of the season on the back of a dramatic week behind the scenes, with technical director Sam Michael and chief aerodynamacist Jon Tomlinson announcing they will leave at the end of the season and Spygate protagonist Mike Coughlan signing a deal to join the team from next month.

After all the reshuffling prior to the weekend, Williams' focus now returns firmly to the job at hand as it seeks to open its account for the season with Michael confirming a number of new parts will be used in an effort to boost performance.

"We're bringing a number of upgrades to the FW33 over the next few races, starting with Istanbul," he said. "The package for Turkey will include new brake ducts, revised front wing and rear wings, plus some other secondary items. Combined, these components should give the FW33 a decent step-up in performance. Our objective is to get the car into the points as soon as possible.

"Istanbul Park has a great layout for the drivers to get their teeth into. In particular, it boasts an excellent natural overtaking spot at the end of the back straight. Turkey has the notorious turn eight, a left-hander which places considerable loads on the car's aerodynamics. A car that can handle those pressures, combined with one capable of some significant kerb riding through the last sequence of corners, is critical at this track."

Team leader Rubens Barrichello said he was confident that the new parts would be beneficial to the team.

"I want to have a more competitive weekend with the team than we have had so far this season," he said. "We have new parts coming for Turkey which will hopefully work in our favour. I love Istanbul Park. It is one of the most challenging circuits on the calendar and we will aim to be flat out there. Everyone says turn eight is a highlight, and it is, but I also find the circuit nice from a set-up point of view with qualifying also a good challenge. I like the track as a whole."