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…
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