The Aussie Driver Search Mercedes-AMG GT3 set a time of 3:33.724s to head the WM Waste Management entry of Max Twigg and Tony D’Alberto (Mercedes-AMG GT3) by little more than half a second.
The session started in the dry, but rain quickly closed in and doused the circuit without a lap set.
Conditions then settled in, the circuit remaining wet for the duration, adding a further element to the first official Australian GT running on the circuit.
The Robson/Reynolds pairing were among the sessions’ most prolific, banking 14 laps, as did Peter Hackett and Jake Fouracre (Eggleston Motorsport).
With conditions expected to improve for the remainder of the weekend, several opted to limit their running.
Jeremy Gray and Andrew Miedecke (JMG/Bilstein) recorded just two-timed laps, as too did Tony Walls and Warren Luff (Objective Racing).
Liam Talbot (Hot Wheels Ca Care Products) only completed an installation lap before handing the car to John Martin who chalked up seven timed efforts.
Having missed Thursday’s test day, Tony Quinn and Shane van Gisbergen (Mariani Beef Jerky) ended the day third despite their limited experience, 1.9-seconds off the pace of Robson/Reynolds.
Dylan O’Keeffe and Ash Samadi (Ah Apartments) ended proceedings fourth fastest, the tricky and constantly changing conditions, mixed with the long lap, seeing large time gaps between cars.
Scott Taylor had a spin mid-way through the session to draw a red flag after the Mercedes-AMG GT3 he’s sharing with Craig Baird found itself stuck in the slippery infield but still managed the fifth best time of the day.
Also in the ten were Jim Manolios and Dean Canto (Haemokinesis/Trofeo Estate/Prielli) in eighth fastest and the Geoff Emery/Garth Tander (Valvoline) in tenth.
Leading the GT4 class was Justin McMillan and Glen Wood, setting the 14th fastest time overall to head their class by an impressive eight seconds.
Australian GT continues tomorrow with two back-to-back Qualifying sessions, beginning at 12:30 before the first hour of the opening CAMS Australian Endurance Championship race at 17:20.
Results: Australian GT Championship, The Bend, Practice
Pos Competitor/Team Driver Vehicle Fastest Lap Class
1 Aussie Driver Search J.Robson/D.Reynolds Mercedes-AMG GT3 3:33.724 CH
2 WM Waste Management M.Twigg/T.D’Alberto Mercedes-AMG GT3 3:34.306 CH
3 Mariani Beef Jerky T.Quinn/S.van Gisbergen Mclaren 650S GT3 3:35.650 CH
4 Ah Apartments A.Samadi/D.O’Keefe Audi R8 LMS 3:36.070 CH
5 Scott Taylor Motorsport S.Taylor/C.Baird Mercedes-AMG GT3 3:37.347 CH
6 Walkinshaw GT3 L.Talbot/J.Martin Porsche 911 GT3-R 3:38.207 CH
7 BMW Team SRM S.Richards/M.Almond BMW M6 GT3 3:39.060 CH
8 Haemokinesis / Trofeo Estate J.Manolios/D.Canto Lamborghini Huracan 3:39.083 CH
9 Eggleston Motorsport P.Hackett/J.Fouracre Mercedes-AMG GT3 3:40.954 CH
10 Valvoline G.Emery/G.Tander Audi R8 LMS 3:41.853 CH
11 The Bend Motor Sport Park Y.Shahin/L.Youlden Mercedes-AMG GT3 3:42.766 CH
12 Total Oil / Opti-Coat / Logite F.Ross/D.Padayachee McLaren 650S GT3 3:43.307 CH
13 Wall Racing A.Deitz/C.McConville Huracan GT3 3:45.977 CH
14 Interlloy / M Motorsport J.McMillan/G.Wood Reiter KTM X-Bow 3:49.397 GT4
15 Objective Racing T.Walls/W.Luff McLaren 650S GT3 3:50.729 CH
16 KFC/Ctech Laser/Moveitnet/B&B T.Bates/D.Gaunt Audi R8 LMS 3:51.404 CH
17 Hogs Breath Cafe / Griffith Co M.Griffith/H.Jones Ginetta G55 GT4 3:57.425 GT4
18 M Motorsport / Vantage Freight D.Crampton/T.Harrison Reiter KTM X-Bow 3:58.128 GT4
19 JMG / Bilstein J.Gray/A.Miedecke Aston Martin Vantage GT4 4:22.057 GT4
Source. Australian GT