The fourth hour finished with the #55 Mazda leading at the end of a long Safety Car period for the recovery of a pair of GTD cars and a repair for the barrier and wall at T3 after a substantial hit.
Harry Tincknell led the pack just ahead of a closely battling trio, Juan Pablo Montoya second in the #60 Meyer Shank Acura, a car that had lost some time in the pits under an earlier yellow flag period as the team made a significant adjustment at the front of the car.
After Montoya came Filipe Albuquerque, the Portuguese having to push hard to fend off the close attentions of Scott Dixon in the #01 Ganassi Cadillac that lost out in a pair of quick-fire cautions.
The long battle for the lead in LMP2 went the way of Tristan Nunez in the #11 WIN Autosports Oreca early into the third hour, but the car was soon in significant trouble, crawling back to the pits with the team struggling to diagnose and fix an electronics issue.
That left the #11 way down the order, the #52 finishing the fourth hour ahead of the #8 Tower Motorsports car with the #18 Era Motorsports car third.
The #22 United Autosports car meanwhile had a four lap delay in the pits but is back and lapping very quickly again.
At the same time a Full Course Yellow was out for the #54 Core Autosports Ligier JS P320 in trouble in the hands of Jon Bennett, the #38 Performance Tech Ligier would lead the pack at four hours.
GTLM saw the troubled #4 Corvette taking time in the pits and then behind the wall under caution to fix what proved to be a faulty coil pack, the car back out and running 2 laps down.
The class was led for a while by the #24 BMW but the #3 Corvette would be back ahead in the hands of Jordan Taylor as the field settled down after the long caution, the WeatherTech Porsche running a strong third after the #25 BMW lost time with a penalty.
The real dramas came in GTD where Franck Perera had a huge moment under braking into T3, lost control of the #19 GRT Lamborghini and had a double hit at the apex of the turn with Billy Johnson in the luckless #28 Alegra Motorsport AMG, both getting air as they left the circuit on the exit of the turn hitting the tyre barrier hard enough to move the concrete wall behind substantially.
Both drivers were thankfully OK, both cars out on the spot with around 30 minutes needed to make repairs to the safety barriers.
Soon after the race went back to green there was another GTD on GTD incident with the already delayed #99 Porsche hitting the #1 Paul Miller Lamborghini on the approach to T17, rear damage for the Huracan, yet more frontal damage for the #99!
At the front of the class the pit stop shuffle didn’t serve the #14 Lexus or the #15 Wright Porsche well, the latter had led in the hands of Pat Long.
The #9 Pfaff Porsche, in the hands of Laurents Vanthoor emerged in the lead ahead of Raman De Angelis in the #23 Heart of Racing Aston Martin and Andy Lally in the #44 Magnus/ Archangel Acura.
The second race of the IMSA WeatherTech SportsCar Championship season is also the second event in IMSA Michelin Endurance Cup competition, meaning separate points are awarded at specified junctures of each endurance event. Earning five points for leading their classes at the four-hour mark were: the #55 Mazda in DPi, the #52 PR1 Mathiasen Motorsports ORECA LMP2 07 in LMP2, the #38 Performance Tech Motorsports Ligier JS P320 in LMP3, the #25 BMW Team RLL BMW M8 GTE in GTLM and the #9 Pfaff Motorsports Porsche 911 GT3R in GTD.
Including the Michelin Endurance Cup points earned from the Rolex 24 At Daytona in January and through four hours of the Sebring Twelve Hours, season-long leaders are:
DPi: No. 10 Konica Minolta Acura ARX-05, 21 points; No. 01 Cadillac Chip Ganassi Racing Cadillac DPi-V.R, 15;
LMP2: No. 8 Tower Motorsport ORECA LMP2 07, 20 points; No. 18 Era Motorsport ORECA LMP2 07, 16;
LMP3: No. 74 Riley Motorsports Ligier JS P320, 23 points; No. 33 Sean Creech Motorsports Ligier, 17;
GTLM: No. 3 and No. 4 Corvette Racing Chevrolet Corvette C8.Rs, tied at 21 points;
GTD: No. 57 Winward Racing Mercedes-AMG GT3 (not racing at Sebring), 16 points; No. 16 Wright Motorsports Porsche 911 GT3R, 15.
Additional Michelin Endurance Cup points will also be awarded at the eight-hour mark and the finish of the race.
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March 21, 2021 at 01:52AM
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Hour Four Report: Mazda Leads After Dramas In GTD - Dailysportscar
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