Talk:Porsche 911 RSR Championship/@comment-27767293-20160517144036/@comment-27962837-20160517145737

Try like this: Stay in one upgrade tree until you have the time-reducing ads. As soon as they stop, quit and reset ad-id, go back, and do it again. Make sure you don't change upgrade trees (I mean Engine, Drivetrain, etc. under tree), because if you do, the option will go away and you have to quit and reset ad-id. At least this works for me. It's painfully slow, but still faster than waiting 12 hours.