The 90-minute session was interrupted by two red flags, but the Wayne Taylor Racing Acura ARX-05’s progress appeared almost serene, as Taylor and Filipe Albuquerque turned 44 laps to set the pace by a commanding margin.
Taylor’s 1min14.400sec lap of the 2.238-mile course was 0.681sec faster than the best effort by Oliver Jarvis in Meyer Shank Racing’s similar Acura.
Meanwhile Tristan Vautier was almost a second behind in the fastest of the Cadillac DPi-V.Rs, the JDC-Miller MotorSports machine. He was 0.2sec faster than Action Express Racing’s Pipo Derani.
The Chip Ganassi Racing Cadillacs were fifth and sixth, although Renger van der Zande in the #01 car had a dramatic looking off-course excursion at Turn 5 that mowed down a WeatherTech signboard at the side of the track. He had to pit for replacement bodywork.
In LMP2, Louis Deletraz topped the speed charts for Tower Motorsports, almost half a second up on Juan Pablo Montoya’s best in the DragonSpeed car, while Era Motorsport’s Ryan Dalziel and Jonathan Bomarito of PR1/Mathiasen Motorsports were third and fourth.
As usual variety of manufacturers marked the GTD Pro / GTD rankings, with Jack Hawksworth eventually emerging on top in the GTD Pro Vasser Sullivan Racing Lexus RC F GT3 with a 1m23.961sec effort. His nearest rival was WeatherTech Racing’s returnee Daniel Juncadella second in the Mercedes-AMG GT3.
Robby Foley was quickest GTD-class driver in the Turner Motorsports BMW M4 GT3, less than a tenth faster than Jan Heylen’s Wright Motorsports Porsche 911 GT3 R.
Second practice is scheduled for 8.55am local (Pacific) time tomorrow.
Practice results:
| Cla | Num | Driver | Class | Chassis | Time | Gap |
|---|---|---|---|---|---|---|
| 1 | 10 |
 Ricky Taylor  Filipe Albuquerque | DPi | Acura DPi | 1'14.400 | |
| 2 | 60 |
 Oliver Jarvis Tom Blomqvist | DPi | Acura DPi | 1'15.081 | 0.681 |
| 3 | 5 |
 Tristan Vautier Richard Westbrook | DPi | Cadillac DPi | 1'15.331 | 0.931 |
| 4 | 31 |
 Pipo Derani Tristan Nunez | DPi | Cadillac DPi | 1'15.524 | 1.124 |
| 5 | 01 |
 Renger van der Zande Sébastien Bourdais | DPi | Cadillac DPi | 1'15.624 | 1.224 |
| 6 | 02 |
 Earl Bamber Alex Lynn | DPi | Cadillac DPi | 1'16.064 | 1.664 |
| 7 | 8 |
 John Farano  Louis Deletraz | LMP2 | ORECA LMP2 07 | 1'16.316 | 1.916 |
| 8 | 81 |
 Henrik Hedman  Juan Pablo Montoya | LMP2 | ORECA LMP2 07 | 1'16.798 | 2.398 |
| 9 | 18 |
Dwight Merriman Ryan Dalziel | LMP2 | ORECA LMP2 07 | 1'16.824 | 2.424 |
| 10 | 11 |
Steven Thomas Jonathan Bomarito | LMP2 | ORECA LMP2 07 | 1'16.865 | 2.465 |
| 11 | 20 |
 Dennis Andersen Anders Fjordbach | LMP2 | ORECA LMP2 07 | 1'18.575 | 4.175 |
| 12 | 52 |
Josh Pierson Patrick Kelly | LMP2 | ORECA LMP2 07 | 1'18.657 | 4.257 |
| 13 | 14 |
Jack Hawksworth Ben Barnicoat | GTD PRO | Lexus RC F GT3 | 1'23.961 | 9.561 |
| 14 | 79 |
Cooper MacNeil  Daniel Juncadella | GTD PRO | Mercedes-AMG GT3 | 1'24.171 | 9.771 |
| 15 | 96 |
Robby Foley Bill Auberlen | GTD | BMW M4 GT3 | 1'24.235 | 9.835 |
| 16 | 16 |
Ryan Hardwick  Jan Heylen | GTD | Porsche 911 GT3 R | 1'24.301 | 9.901 |
| 17 | 12 |
Frankie Montecalvo Aaron Telitz | GTD | Lexus RC F GT3 | 1'24.330 | 9.930 |
| 18 | 9 |
 Matt Campbell Mathieu Jaminet | GTD PRO | Porsche 911 GT3 R | 1'24.433 | 10.033 |
| 19 | 39 |
Robert Megennis Jeff Westphal | GTD | Lamborghini Huracan GT3 | 1'24.470 | 10.070 |
| 20 | 1 |
Bryan Sellers Madison Snow | GTD | BMW M4 GT3 | 1'24.489 | 10.089 |
| 21 | 25 |
Connor de Phillippi John Edwards | GTD PRO | BMW M4 GT3 | 1'24.531 | 10.131 |
| 22 | 70 |
Brendan Iribe Frederik Schandorff | GTD | McLaren 720S GT3 | 1'24.561 | 10.161 |
| 23 | 57 |
Russell Ward Philip Ellis | GTD | Mercedes-AMG GT3 | 1'24.612 | 10.212 |
| 24 | 23 |
Ross Gunn Alex Riberas | GTD PRO | Aston Martin Vantage GT3 | 1'24.639 | 10.239 |
| 25 | 3 |
Antonio Garcia Jordan Taylor | GTD PRO | Corvette C8.R GTD | 1'24.714 | 10.314 |
| 26 | 27 |
Roman De Angelis Maxime Martin | GTD | Aston Martin Vantage GT3 | 1'24.826 | 10.426 |
| 27 | 42 |
Marco Holzer Jaden Conwright | GTD | Lamborghini Huracan GT3 | 1'24.842 | 10.442 |
| 28 | 28 |
Michael de Quesada Daniel Morad | GTD | Mercedes-AMG GT3 | 1'24.889 | 10.489 |
| 29 | 32 |
 Dirk Muller Stevan McAleer | GTD | Mercedes-AMG GT3 | 1'25.125 | 10.725 |
| 30 | 99 |
Rob Ferriol Katherine Legge | GTD | Porsche 911 GT3 R | 1'25.197 | 10.797 |
| 31 | 51 |
Ryan Eversley Aidan Read | GTD | Acura NSX GT3 | 1'25.367 | 10.967 |
| 32 | 34 |
Kyle Washington James Sofronas | GTD | Porsche 911 GT3 R | 1'26.141 | 11.741 |
| View full results | ||||||
