Hamilton expects KERS to give McLaren and Ferrari a good boost off the start line in Valencia allowing him to gain about 15 meters into turn one.
McLaren will be trying out both options on Friday with Kovalainen running with KERS and Hamilton seeing how the car goes without it during practice one and practice two. There are not many hard braking areas where the KERS can be effectively recharged.
Excerpt: Of the four teams with KERS only McLaren and Ferrari will be using the system in Turkey. Renault and BMW will not be using it.
At the Monaco Grand Prix Ferrari and McLaren both decided to use KERS and Renault and BMW decided against its use. Massa and Hamilton using KERS had the rear break away in the first qualifying session. Massa went on to qualify 5th and ended up 4th in the race. Hamilton damaged his car and after high expectations for a podium finish ended up 12th.
The Double-decker diffuser gang take five of the eight points scoring places in Melbourne.