This may clarify it , a post from developer on f1 2010 forums :
Originally Posted by T4RG4
Scrowny is correct. Whilst that seasons R&D is reset, finishing in a much better position compared to the teams previous year will see your team invest in development of a better car. The leap in performance comes from how much of a change their finishing position was in relation to the year previous. So - you can take Lotus to the top...
Good news i think but i still may change teams at the end of the season just to feel what the other cars are like
#6616388, By LoopTheory F1 2010 (Codemasters)
LoopTheory 350 posts
Seen 17 hours ago
Registered 10 years ago