Jonathan Bomarito set the fastest time in a one-hour, 15-minute Saturday night session on the penultimate day of the Roar Before the Rolex 24.
The No. 55 Team Joest Mazda DPi topped the charts with a lap of 1m34.533s, just a tick behind Renger van der Zande’s fast time of the weekend, 1m34.534s, set Saturday afternoon in the No. 10 Konica Minolta Cadillac DPi-V.R. Mazdas ran 1-2 under the lights, with Oliver Jarvis second at 1m34.977s in the No. 77 Team Joest entry.
Times continued to plummet throughout the day as teams came to grips with the new Michelin tires that will be used in 2019, with all 11 cars in the lead class bettering Joao Barbosa’s two-year-old track mark of 1m36.903s.
Pipo Derani, who joined the Action Express Racing fold for 2019, was third fastest with a 1m35.179s lap in the No. 31 Whelen Engineering Cadillac DPi-V.R. He was followed by teammate Mike Conway in the No. 5 Mustang Sampling entry with a 1m35.215s, and Colin Braun’s 1m35.273s in the No. 54 CORE autosport Nissan DPi.
Gabriel Aubry led the four LMP2 competitors with a best lap of 1m36.990s in the No. 52 PR1 Mathiasen Motorsports ORECA LMP2.
The Porsche GT Team ran 1-2 in GTLM. Nick Tandy was fastest at 1m43.402s in the No. 911 Porsche 911 RSR, followed by Earl Bamber’s 1m43.524s in the sister No. 912.
Victor Franzoni led GTD with a best lap of 1m45.842s in the No. 13 Via Italia Racing Ferrari 488 GT3, followed by Daniel Serra’s 1m45.954s in the No. 51 Spirit of Race Ferrari 488 GT3.
The session ran green from start to finish.
Corvette Racing suffered a bit of bad luck early in the session, when a piece of debris came through the floor of the engine compartment. The damage was bad enough to force the team to switch engines.
On Sunday, the Roar concludes with a pair of practices for the Prototype and GTLM classes, which will be held at 10:30 a.m. and 2:45 p.m. ET. GTLM qualifying to determine pit and garage selection for the Rolex 24 begins at 11:50 a.m., with the DPi and LMP2 classes holding combined qualifying at 12:15 p.m. The GTD class held their qualifying for pit/garage selection on Saturday, with Bia Figueiredo leading qualifying in the No. 57 Meyer Shank Racing with Curb-Agajanian Caterpillar Acura NSX-GT3.