Red Bull Holden Racing Team star Jamie Whincup won two of the three races at the Townsville street circuit in last weekend's round of the Supercars Championship. But he knows that if his mechanics and engineers have not improved his car in the intervening seven days he will have little chance of a repeat when the cars hit the track in Townsville once more this weekend.

Seven-time Supercars champion Whincup is certain that the pace of development, even in the short space of a week, means that he and his team will have to be sharper, smarter and faster than they were last weekend if they are to prevail again.

"We hit the sweet spot and got it right. What we had last weekend was very competitive so we won't venture too far away from it," he said.

"But we can't just rely on last week's settings and hope to win again. All the teams and engineers have had a week to work on their set-ups and fine tune how their cars worked last week. They have spent that time looking at the data and finding ways to optimise performance further, and I am expecting everyone to be going quicker.