A HARD crash for soon-to-be Supercars graduate Jackson Walls has caused a lengthy red flag period during opening Dunlop Super2 Series practice at the bp Adelaide Grand Final.

Walls was on his first representative flying lap nine minutes into the 40-minute session when a suspected mechanical failure pitched him heavily into the wall on the approach to the final corner.

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The #11 Triple Eight Holden hit the concrete barriers past the end of the tyre wall on the exit of the penultimate kink, the car eventually coming to rest on the access road that the Super2 field uses to drive from its paddock onto the circuit.

Walls, who entered the Super2 finale as the top rookie in points and will graduate to the ‘main game’ next year in Triple Eight’s new third Mustang, was subsequently taken to the circuit’s medical centre for checks.

The session was halted for over 10 minutes while the concrete wall was moved back into place before it resumed.

Tickford’s Nash Morris led teammate Lochie Dalton, Brad Jones Racing’s Brad Vaughan and points leader Rylan Gray at the time of the stoppage, the second-generation racer leaving the benchmark at 1m21.9173s.

By the time the chequered flag waved, almost a full second had been sliced off that time.

Pic: Mark Walker

Gray headed the order with a 1m20.9265s ahead of teammate Reuben Goodall by just 0.0970s, with Jordyn Sinni, Cameron McLeod, Vaughan, Ben Gomersall, Dalton, Jobe Stewart, Matt Hillyer and reigning champion Zach Bates completing the top 10.

Morris improved his best by some three tenths but wound up 12th.

NASCAR racer Jesse Love enjoyed a solid opening hitout in Super2, the newly-crowned Xfinity Series champion ending the session 22nd but just 2.47s shy of the fastest time.

The Super2 field heads out for Practice 2 at 2pm local time / 2:30pm AEDT.

RESULTS: Practice 1 – Dunlop Super2 Series Rd.6, Adelaide (40min)

PosNo.DriverTeamCarTime155Rylan GrayTickfordFord1m20.9265s25Reuben GoodallTickfordFord+0.0970s354Jordyn SinniEgglestonHolden+0.1943s492Cameron McLeodKellyFord+0.2280s580Brad VaughanBJRHolden+0.2280s635Ben GomersallTriple EightHolden+0.2547s76Lochie DaltonTickfordFord+0.4275s899Jobe StewartErebusHolden+0.4952s925Matt HillyerWAUHolden+0.5432s101Zach BatesEgglestonHolden+0.5804s11118Jarrod HughesImageHolden+0.5938s12222Nash MorrisTickfordFord+0.7469s1336Cody BurcherEgglestonHolden+0.7686s142Campbell LoganWAUHolden+0.8867s1553Max GeogheganKellyFord+0.9672s169Cody GillisBJRHolden+1.0966s1738Elliott ClearyEgglestonHolden+1.2626s1833Bailey SweenyBRTFord+1.5834s1928Ayrton HodsonAndersonFord+1.6370s2088Bradi OwenEgglestonHolden+1.9368s2117Ryan TomsettAndersonFord+1.9438s2257Jesse LoveImageHolden+2.4739s2311Jackson WallsTriple EightHolden+3.3875s