Scott McLaughlin topped the second Supercars practice session at Hidden Valley while Jamie Whincup hit the wall.
McLaughlin started the half-hour session running the soft-compound Dunlops, the benchmark time – a 1m06.479s – coming inside the first 10 minutes.
The DJR Team Penske driver then switched to hard tyre runs ahead of qualifying.
“The soft balance is pretty good. The hard balance is probably not exactly right,” he said.
“We expected that, it’s just more of balance shift than we thought.
“I’m happy with my balance, I think we can tune it on the bars which is ideal because we can do that during the race.”
It was a shocker of a session for McLaughlin’s closest title rival, however, with Whincup taking a high-speed trip into the wall.
The seven-time series champion lost control of his Triple Eight Holden through Turn 7, the car skipping over the grass before collecting the wall and damaging the rear end.
That was the end of his session, Whincup jumping on the tools to help get the car fixed before qualifying.
“I just lost the rear,” he explained. “The car’s been taily all day and I just lost the rear down the hill. There’s no run-off there so I went straight in the tyres.
“It’s not a massive hit with the suspension, but it’s still a lot of work to get the car out for qualifying.”
Whincup wasn’t the only driver to find the wall, with James Courtney sending his Tickford Ford into the barrier at Turn 10 right at the end of the session.
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