Nakajima sets the pace at Barcelona

Although the day started damp, a dry line appeared in the morning and teams began working on race distance runs as they honed their machinery.

But it was Nakajima, only taking over his FW30 from Williams test driver Nico Hulkenberg late in the afternoon, who set the fastest time of the day.

Nakajima set his best time right at the end of a three-lap run near the end of the session.

The Japanese driver's best effort was just three hundredths of a second faster than McLaren's Heikki Kovalainen, with Pedro de la Rosa just two hundredths further adrift. Both men set their quickest times over five-lap runs.

Ferrari's Felipe Massa continued to show the F2008 had the edge on long run pace, even though his fastest lap of the day was just shy of main rivals McLaren.

Massa caused one of the seven red flags of the session when he spun during a race simulation.

Kovalainen and Mark Webber stopped on track two times each, while a spin by Timo Glock and a stoppage by Fernando Alonso caused the remaining red flags of the day.

Nico Rosberg was fifth fastest for Williams, ahead of Red Bull Racing's Webber and David Coulthard.

Glock finished the day as 10th quickest after going through aerodynamic work with the Toyota.

"We made it through a lot of aero work today so we collected good data for the guys back in the factory," Glock said. "There were a few red flags but I was happy with the car by the end of the running.

"Overall it's been a productive two days but we still have to work on the balance over long runs. It would help everybody if next week's test stays dry because it would be good to collect more information from consistent conditions before the first race."

Today's times:

Pos  Driver        Team                      Time      Laps
 1.  Nakajima      Williams-Toyota      (B)  1:22.153   32
 2.  Kovalainen    McLaren-Mercedes     (B)  1:22.185   64
 3.  de la Rosa    McLaren-Mercedes     (B)  1:22.208   92
 4.  Massa         Ferrari              (B)  1:22.213   95
 5.  Rosberg       Williams-Toyota      (B)  1:22.248  108
 6.  Webber        Red Bull-Renault     (B)  1:22.477   81
 7.  Coulthard     Red Bull-Renault     (B)  1:22.499  102
 8.  Badoer        Ferrari              (B)  1:22.535  102
 9.  Alonso        Renault              (B)  1:22.657   61
10.  Glock         Toyota               (B)  1:22.901  109
11.  Piquet        Renault              (B)  1:23.286  104
12.  Kobayashi     Toyota               (B)  1:24.132   56
13.  Hulkenberg    Williams-Toyota      (B)  1:24.222   59

All Timing Unofficial