Sebastien Bourdais set the best time of 1m46.180s aboard the #01 Cadillac DPi-V.R around 40 minutes into the 90-minute session, around four tenths slower than Pipo Derani's FP2 benchmark.
Following a late red-flag period caused by a Turn 17 shunt for Katherine Legge's Team Hardpoint Porsche 911 GT3 R, Earl Bamber put the sister #02 Ganassi Cadillac in second on a 1m46.546s, moving ahead of Derani in the best of the Action Express Racing-run Caddys, the #31 Whelen Engineering car.
Behind an all-Cadillac top three, Tom Blomqvist was the top Acura driver with a 1m47.226s aboard the Rolex 24 at Daytona-winning Meyer Shank Racing ARX-05, albeit more than a second off the pace.
Next up was the JDC-Miller MotorSports Cadillac driven by Tristan Vautier, followed by Mike Rockenfeller in the AXR-run Ally Caddy and Filipe Albuquerque's Wayne Taylor Racing Acura.
In LMP2, Scott Huffaker set the pace with a 1m48.842s aboard the #52 PR1/Mathiasen Motorsports Oreca 07, lowering the class benchmark set in FP2.
Giedo van der Garde was second-fastest aboard the Racing Team Nederland Oreca, ahead of the DragonSpeed car pedalled by Sebastian Montoya, son of ex-Formula 1 and IndyCar racer Juan Pablo.
Danish youngster Malthe Jakobsen topped the timesheets in the LMP3 dvision aboard the Sean Creech Motorsports Ligier JS P320 with a best effort of 1m56.878s, a little under a tenth of a second faster than nearest rival Felipe Fraga in the Riley Motorsports Ligier.
The GT Daytona class was headed by the #21 AF Corse Ferrari 488 GT3 Evo of Toni Vilander, who led an all-Pro/Am top three.
However, Vilander's 2m00.962s was around four tenths off the pace of the best GTD time of the weekend so far, which came in FP1 courtesy of the #24 works GTD Pro BMW M4 GT3.
Two more BMWs were second- and third-fastest in GTD, with Bill Auberlen putting the Turner Motorsports example in second ahead of Madison Snow in the debuting Paul Miller Racing entry.
Best of the GTD Pro cars came next, with Daniel Serra leaving it late to set the class benchmark of 2m01.569s in the Risi Competizione Ferrari.
Jan Heylen was next up in the Wright Motorsports Porsche - fourth in GTD and fifth of the GT3 machines overall - ahead of Mirko Bortolotti's TR3 Racing Lamborghini Huracan GT3 and the two Rahal Letterman Lanigan Racing-run BMWs of Philipp Eng and Connor De Phillippi.
Practice results:
| Cla | Num | Driver | Class | Chassis | Time | Gap |
|---|---|---|---|---|---|---|
| 1 | 01 |
 Renger van der Zande  Sébastien Bourdais  Ryan Hunter-Reay | DPi | Cadillac DPi | 1'46.180 | |
| 2 | 02 |
 Earl Bamber  Alex Lynn  Neel Jani | DPi | Cadillac DPi | 1'46.546 | 0.366 |
| 3 | 31 |
 Pipo Derani Tristan Nunez Mike Conway | DPi | Cadillac DPi | 1'46.793 | 0.613 |
| 4 | 60 |
Oliver Jarvis Tom Blomqvist  Stoffel Vandoorne | DPi | Acura DPi | 1'47.226 | 1.046 |
| 5 | 5 |
Tristan Vautier Richard Westbrook Loic Duval | DPi | Cadillac DPi | 1'47.235 | 1.055 |
| 6 | 48 |
 Mike Rockenfeller  Kamui Kobayashi  Jose Maria Lopez | DPi | Cadillac DPi | 1'47.462 | 1.282 |
| 7 | 10 |
Ricky Taylor  Filipe Albuquerque Will Stevens | DPi | Acura DPi | 1'47.598 | 1.418 |
| 8 | 52 |
Ben Keating  Mikkel Jensen Scott Huffaker | LMP2 | ORECA LMP2 07 | 1'48.842 | 2.662 |
| 9 | 29 |
Frits van Eerd Giedo van der Garde Dylan Murry | LMP2 | ORECA LMP2 07 | 1'49.449 | 3.269 |
| 10 | 81 |
 Henrik Hedman  Juan Pablo Montoya Sebastian Montoya | LMP2 | ORECA LMP2 07 | 1'49.522 | 3.342 |
| 11 | 8 |
 John Farano Louis Deletraz Rui Andrade | LMP2 | ORECA LMP2 07 | 1'49.830 | 3.650 |
| 12 | 18 |
Dwight Merriman Kyle Tilley Ryan Dalziel | LMP2 | ORECA LMP2 07 | 1'50.332 | 4.152 |
| 13 | 11 |
Steven Thomas Josh Pierson Jonathan Bomarito | LMP2 | ORECA LMP2 07 | 1'50.669 | 4.489 |
| 14 | 22 |
Jim McGuire Guy Smith Duncan Tappy | LMP2 | ORECA LMP2 07 | 1'53.022 | 6.842 |
| 15 | 20 |
Dennis Andersen Anders Fjordbach Fabio Scherer | LMP2 | ORECA LMP2 07 | 1'53.239 | 7.059 |
| 16 | 33 |
Joao Barbosa Malthe Jakobsen Lance Willsey | LMP3 | Ligier JS P320 | 1'56.878 | 10.698 |
| 17 | 74 |
Gar Robinson Felipe Fraga Kay van Berlo | LMP3 | Ligier JS P320 | 1'56.971 | 10.791 |
| 18 | 54 |
Jon Bennett Colin Braun George Kurtz | LMP3 | Ligier JS P320 | 1'57.836 | 11.656 |
| 19 | 38 |
Daniel Goldburg Rasmus Lindh  Cameron Shields | LMP3 | Ligier JS P320 | 1'58.067 | 11.887 |
| 20 | 7 |
Mark Kvamme Anthony Mantella | LMP3 | Duqueine D08 | 1'58.096 | 11.916 |
| 21 | 36 |
Jarett Andretti Josh Burdon Gabby Chaves | LMP3 | Ligier JS P320 | 1'58.519 | 12.339 |
| 22 | 30 |
Ari Balogh Garett Grist Dakota Dickerson | LMP3 | Ligier JS P320 | 1'58.800 | 12.620 |
| 23 | 13 |
Orey Fidani Kuno Wittmer Lars Kern | LMP3 | Duqueine D08 | 1'59.675 | 13.495 |
| 24 | 6 |
Efrin Castro Moritz Kranz Ugo De | LMP3 | Duqueine D08 | 2'00.157 | 13.977 |
| 25 | 21 |
Simon Mann Luis Perez Companc  Toni Vilander | GTD | Ferrari 488 GT3 | 2'00.962 | 14.782 |
| 26 | 40 |
Max Hanratty Todd Archer James Vance | LMP3 | Duqueine D08 | 2'01.036 | 14.856 |
| 27 | 96 |
Robby Foley Bill Auberlen Michael Dinan | GTD | BMW M4 GT3 | 2'01.408 | 15.228 |
| 28 | 1 |
Bryan Sellers Madison Snow Erik Johansson | GTD | BMW M4 GT3 | 2'01.444 | 15.264 |
| 29 | 62 |
Daniel Serra  Davide Rigon Eddie Cheever III | GTD PRO | Ferrari 488 GT3 | 2'01.569 | 15.389 |
| 30 | 16 |
Ryan Hardwick Zacharie Robichon Jan Heylen | GTD | Porsche 911 GT3 R | 2'01.592 | 15.412 |
| 31 | 63 |
Marco Mapelli Andrea Caldarelli Mirko Bortolotti | GTD PRO | Lamborghini Huracan GT3 | 2'01.604 | 15.424 |
| 32 | 24 |
 Philipp Eng Marco Wittmann Nick Yelloly | GTD PRO | BMW M4 GT3 | 2'01.655 | 15.475 |
| 33 | 25 |
Connor de Phillippi John Edwards Augusto Farfus | GTD PRO | BMW M4 GT3 | 2'01.871 | 15.691 |
| 34 | 9 |
Matt Campbell Mathieu Jaminet Felipe Nasr | GTD PRO | Porsche 911 GT3 R | 2'01.879 | 15.699 |
| 35 | 93 |
Ashton Harrison-Henry Kyle Marcelli Tom Long | GTD PRO | Acura NSX GT3 | 2'01.913 | 15.733 |
| 36 | 28 |
Michael de Quesada Daniel Morad Maximillian Goetz | GTD | Mercedes-AMG GT3 | 2'02.011 | 15.831 |
| 37 | 14 |
Jack Hawksworth Ben Barnicoat Aaron Telitz | GTD PRO | Lexus RC F GT3 | 2'02.029 | 15.849 |
| 38 | 66 |
Kyffin Simpson Till Bechtolsheimer Mario Farnbacher | GTD | Acura NSX GT3 | 2'02.055 | 15.875 |
| 39 | 59 |
Jon Miller Patrick Gallagher Paul Holton | GTD | McLaren 720S GT3 | 2'02.098 | 15.918 |
| 40 | 47 |
Roberto Lacorte Giorgio Sernagiotto Antonio Fuoco | GTD | Ferrari 488 GT3 | 2'02.136 | 15.956 |
| 41 | 12 |
Frankie Montecalvo Scott Andrews Richard Heistand | GTD | Lexus RC F GT3 | 2'02.148 | 15.968 |
| 42 | 32 |
Mike Skeen Stevan McAleer  Daniel Juncadella | GTD | Mercedes-AMG GT3 | 2'02.200 | 16.020 |
| 43 | 70 |
Brendan Iribe Ollie Millroy  Jordan Lee Pepper | GTD | McLaren 720S GT3 | 2'02.206 | 16.026 |
| 44 | 23 |
Ross Gunn Alex Riberas Maxime Martin | GTD PRO | Aston Martin Vantage GT3 | 2'02.216 | 16.036 |
| 45 | 39 |
Robert Megennis Corey Lewis Jeff Westphal | GTD | Lamborghini Huracan GT3 | 2'02.342 | 16.162 |
| 46 | 79 |
Cooper MacNeil Julien Andlauer Alessio Picariello | GTD PRO | Porsche 911 GT3 R | 2'02.651 | 16.471 |
| 47 | 3 |
Antonio Garcia Jordan Taylor Nick Catsburg | GTD PRO | Corvette C8.R GTD | 2'02.690 | 16.510 |
| 48 | 44 |
John Potter Andy Lally Spencer Pumpelly | GTD | Aston Martin Vantage GT3 | 2'02.776 | 16.596 |
| 49 | 42 |
Don Yount Jaden Conwright  Mateo Llarena | GTD | Lamborghini Huracan GT3 | 2'03.132 | 16.952 |
| 50 | 99 |
Rob Ferriol Katherine Legge Stefan Wilson | GTD | Porsche 911 GT3 R | 2'03.147 | 16.967 |
| 51 | 57 |
Russell Ward Philip Ellis Marvin Dienst | GTD | Mercedes-AMG GT3 | 2'03.472 | 17.292 |
| 52 | 27 |
Roman De Angelis Ian James Tom Gamble | GTD | Aston Martin Vantage GT3 | 2'03.504 | 17.324 |
| 53 | 97 |
Cooper MacNeil Jules Gounon Maro Engel | GTD PRO | Mercedes-AMG GT3 | 0.000 | |
| View full results | ||||||
