The IMSA WeatherTech sessions are underway at Sebring ahead of the 67th running of the 12 Hours.
Fastest in FP1 was ex-F1 man Felipe Nasr, the Brazillian putting the #31 Action Express Cadillac on top with a 1:46.996 just 15 minutes into the session.
For the remainder of the running, his time went untouched, though Dane Cameron put the #6 Penske Acura second with a 1:47.351, just 0.355 off Nasr’s best.
That time also prevented a Cadillac 1-2, Cameron pushing the Wayne Taylor Caddy down to third with his time. Renger van der Zande, who is on double duty this weekend ended up third, his best time a 1:47.389!
Making it three DPi manufacturers in the top four was CORE autosport, its Nissan DPi coming within half a second of the best time.
Mazda meanwhile, ended up with its two RT24-Ps down in ninth and 10th overall, the cars over a second and a half off the pace this stage.
It wasn’t all plain sailing for the DPi runners, the #85 JDC Miller Cadillac of Misha Goikhberg having an off at Turn 5 during the sesison bringing out the red flags. The car did get going again though, and made it back to the pits.
Another Red Flag meanwhile, was caused by the LMP2-topping #52 PR1 ORECA, US-racing newcomer Anders Fjordbach stopping out on circuit.
In the GTLM ranks, Porsche led the way with its #912 911 RSR, Laurens Vanthoor the pacesetter for the German marque. The Belgian’s best time was a 1:56.983, three tenths up on the nearest competitor in the field, the #67 Ford of Richard Westbrook.
The #66 Ford ended up third in the class, above the second of the Porsches on the timing screens. It was tight between the top four in the session, the Porsches and Fords all coming within six tenths of each other.
GTD meanwhile saw six manufacturers take up the top six places.
Best of the pack was the #86 MSR Acura NSX GT3. Mario Farnbacher set the team’s best time, a 2:00.793, four tenths clear of the other runners, and the only driver to break the 2:01 mark.
Completing the top three was the #73 Park Place Porsche with a 2:01.240, and the #12 AVS Lexus two tenths further adrift.
Grasser’s Daytona winning Lamborghini slotted in fourth, with the Scuderia Corsa Ferrari fifth and the Riley Mercedes sixth.
In the session the top eight GTD teams all managed to lap within a second of Farnbacher’s time.
Next up for the IMSA teams is FP2 at 14:40 pm.