![](https://cdn-1.motorsport.com/images/amp/24vAJ9g6/s6/01-chip-ganassi-racing-cadilla.jpg)
Bourdais posted a 1m34.732s to head the times 15 minutes from the end of the one-hour session aboard his Chip Ganassi Racing Cadillac Daytona Prototype international.
That eclipsed his 1m34.949s that put the #01 Caddy DPi-V.R at the top of the timesheets early in another session affected by rain.
The track was slightly damp when the green flag was waved and there were further spots of rain mid-session, but times were coming down when the session was red-flagged with just under 10 minutes remaining.
The session yielded the first representative times of the week ahead of a race that will be held in dry but cold conditions according to weather forecasts.
Bourdais's lap compared with the fastest practice lap of 1m34.351s from last weekend's pre-race Roar test and the 1m34.034s that gave JDC-Miller driver Tristan Vautier pole position for the grid-setting 100-mile qualifying race won by Wayne Taylor Racing's Acura ARX-05.
Loic Duval had just gone second in the JDC-Miller Caddy when the interruption came, the Frenchman posting a 1m35.095s.
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Jose Maria Lopez ended up third fastest quickest in the best of the Action Express Racing Cadillacs with a 1m35.235.
Earl Bamber took fourth with a 1m35.587s in the second Ganassi car and reigning IMSA champion Pipo Derani fifth with a 1m35.959s for Action Express as Cadillac blocked out the top five positions.
![](https://cdn-1.motorsport.com/images/mgl/0oOjrel0/s8/48-action-express-cadillac-dpi-1.jpg)
The two Acuras jumped up the order straight after the session restarted with five minutes left on the clock.
A 1m36.049s from Alex Rossi put the WTR Acrua sixth, while Tom Blomqvist improved to 1m36.347s to end up seventh for Meyer Shank Racing.
The late run from the Acuras demoted Phil Hanson in the fastest of the LMP2s to eighth position overall.
The Briton's 1m37.639s in the United Autosports ORECA-Gibson 07 put him just five hundredths ahead of Ferdinand Habsburg's 1m37.689s in the Tower Motorsport entry.
Harry Tincknell was a further two tenths back in third in class in the PR1 Mathiasen ORECA.
Mirko Bortolotti led the GT Daytona Pro field in his TR3 Racing Lamborghini Huracan GT3 Evo.
The Italian's 1m46.085s put him two tenths up on Matteo Cairoli's 1m46.334s in the Proton-run WeatherTech Racing Porsche 911 GT3 R.
Jack Hawksworth took third in the best of the Vasser Sullivan Lexus R CF GT3s.
![](https://cdn-8.motorsport.com/images/mgl/24vAJd56/s8/63-tr3-racing-lamborghini-hura-1.jpg)
The Briton's 1m46.372s was just a couple of hundredths faster than Jan Heylen managed in the Wright Motorsports Porsche to head the GTD pro-am class times.
Andretti Autosport led the way in LMP3, Rasmus Lindh's 1m44.015s in his Ligier-Nissan JSP320 giving him nearly a half-second margin on Kranz Moritz in the fastest of the Muhlner Motorsport Duqueine D08s.
The session was the final time the 61-car field will take to the track ahead of the race, which starts at 1:40pm local time on Saturday.
FP4 Classification:
Cla | Driver | Class | Chassis | Laps | Time | Gap |
---|---|---|---|---|---|---|
1 |
| DPi | Cadillac DPi | 26 | 1'34.732 | |
2 |
| DPi | Cadillac DPi | 26 | 1'35.095 | 0.363 |
3 |
| DPi | Cadillac DPi | 25 | 1'35.235 | 0.503 |
4 |
| DPi | Cadillac DPi | 25 | 1'35.587 | 0.855 |
5 |
| DPi | Cadillac DPi | 27 | 1'35.959 | 1.227 |
6 |
| DPi | Acura DPi | 24 | 1'36.049 | 1.317 |
7 |
| DPi | Acura DPi | 14 | 1'36.347 | 1.615 |
8 |
| LMP2 | ORECA LMP2 07 | 17 | 1'37.639 | 2.907 |
9 |
Rui Pinto | LMP2 | ORECA LMP2 07 | 22 | 1'37.689 | 2.957 |
10 |
Thomas Steven | LMP2 | ORECA LMP2 07 | 21 | 1'37.864 | 3.132 |
11 |
Scott Huffaker | LMP2 | ORECA LMP2 07 | 22 | 1'37.938 | 3.206 |
12 |
Murry Dylan | LMP2 | ORECA LMP2 07 | 22 | 1'38.186 | 3.454 |
13 |
Tijmen van | LMP2 | ORECA LMP2 07 | 26 | 1'38.214 | 3.482 |
14 |
| LMP2 | ORECA LMP2 07 | 26 | 1'38.286 | 3.554 |
15 |
Dwight Merriman | LMP2 | ORECA LMP2 07 | 7 | 1'38.362 | 3.630 |
16 |
Nico Mueller | LMP2 | ORECA LMP2 07 | 14 | 1'39.046 | 4.314 |
17 |
Oliver Rasmussen | LMP2 | ORECA LMP2 07 | 23 | 1'39.359 | 4.627 |
18 |
Josh Burdon | LMP3 | Ligier JS P320 | 21 | 1'43.594 | 8.862 |
19 |
Efrin Castro Ori Ayrton | LMP3 | Duqueine D08 | 17 | 1'44.384 | 9.652 |
20 |
Nolan Siegel Charles Crews Ugo De | LMP3 | Duqueine D08 | 24 | 1'44.465 | 9.733 |
21 |
Antoine Doquin | LMP3 | Duqueine D08 | 15 | 1'44.605 | 9.873 |
22 |
Malthe Jakobsen Seb Priaulx | LMP3 | Ligier JS P320 | 17 | 1'44.879 | 10.147 |
23 |
| LMP3 | Duqueine D08 | 23 | 1'45.229 | 10.497 |
24 |
| GTD PRO | Lamborghini Huracan GT3 | 14 | 1'46.085 | 11.353 |
25 |
Julien Andlauer | GTD PRO | Porsche 911 GT3 R | 24 | 1'46.334 | 11.602 |
26 |
| GTD PRO | Lexus RC F GT3 | 24 | 1'46.372 | 11.640 |
27 |
| GTD | Porsche 911 GT3 R | 23 | 1'46.399 | 11.667 |
28 |
| GTD PRO | Mercedes-AMG GT3 | 20 | 1'46.534 | 11.802 |
29 |
| GTD PRO | Mercedes-AMG GT3 | 15 | 1'46.595 | 11.863 |
30 |
| GTD PRO | Porsche 911 GT3 R | 24 | 1'46.622 | 11.890 |
31 |
| GTD | Mercedes-AMG GT3 | 28 | 1'46.685 | 11.953 |
32 |
| GTD PRO | Porsche 911 GT3 R | 21 | 1'46.730 | 11.998 |
33 |
Linus Lundqvist Maximillian Goetz | GTD | Mercedes-AMG GT3 | 23 | 1'46.856 | 12.124 |
34 |
| GTD | Mercedes-AMG GT3 | 17 | 1'46.930 | 12.198 |
35 |
Kyffin Simpson | GTD | Acura NSX GT3 | 21 | 1'46.936 | 12.204 |
36 |
LLarena Mateo | GTD | Lamborghini Huracan GT3 | 24 | 1'46.942 | 12.210 |
37 |
| GTD | Porsche 911 GT3 R | 14 | 1'47.037 | 12.305 |
38 |
| GTD PRO | Ferrari 488 GT3 | 25 | 1'47.120 | 12.388 |
39 |
Dan Goldburg Hikaru Abe Nicolas Pino | LMP3 | Ligier JS P320 | 16 | 1'47.125 | 12.393 |
40 |
| GTD PRO | Corvette C8.R GTD | 26 | 1'47.167 | 12.435 |
41 |
Rob Ferriol | GTD | Porsche 911 GT3 R | 23 | 1'47.199 | 12.467 |
42 |
Kyle Washington | GTD | Porsche 911 GT3 R | 22 | 1'47.204 | 12.472 |
43 |
| GTD | Lexus RC F GT3 | 23 | 1'47.269 | 12.537 |
44 |
| GTD PRO | Aston Martin Vantage GT3 | 17 | 1'47.294 | 12.562 |
45 |
Michael Dinan | GTD | BMW M4 GT3 | 22 | 1'47.360 | 12.628 |
46 |
| GTD PRO | BMW M4 GT3 | 23 | 1'47.363 | 12.631 |
47 |
Tom Gamble | GTD | Aston Martin Vantage GT3 | 22 | 1'47.371 | 12.639 |
48 |
| GTD | Mercedes-AMG GT3 | 23 | 1'47.416 | 12.684 |
49 |
Brendan Iribe | GTD | McLaren 720S GT3 | 21 | 1'47.443 | 12.711 |
50 |
| GTD | Ferrari 488 GT3 | 27 | 1'47.559 | 12.827 |
51 |
Lance Bergstein Jon Miller | GTD | McLaren 720S GT3 | 17 | 1'47.569 | 12.837 |
52 |
David Pittard Charlie Eastwood | GTD | Aston Martin Vantage GT3 | 15 | 1'47.780 | 13.048 |
53 |
| GTD | Aston Martin Vantage GT3 | 26 | 1'47.878 | 13.146 |
54 |
| GTD PRO | Corvette C8.R GTD | 21 | 1'47.924 | 13.192 |
55 |
| GTD | Lamborghini Huracan GT3 | 19 | 1'48.580 | 13.848 |
56 |
Mann Simon | GTD | Ferrari 488 GT3 | 26 | 1'48.766 | 14.034 |
57 |
| GTD PRO | BMW M4 GT3 | 17 | 1'48.873 | 14.141 |
58 |
Benja Hites | GTD | Lamborghini Huracan GT3 | 21 | 1'49.166 | 14.434 |
59 |
John Megrue | GTD | Lamborghini Huracan GT3 | 13 | 1'49.191 | 14.459 |
60 |
| LMP3 | Ligier JS P320 | 0 | 0.000 | |
61 |
| LMP3 | Ligier JS P320 | 5 | 0.000 | |
View full results |