SEBRING, Fla. One of the distinguishing features of the IMSA WeatherTech SportsCar Championship is the variety of machinery spread among the four classes of competition.

That variety brings with it race cars of various shapes and sizes, creating visual and audible differences for race fans to appreciate and root for. Whether its AO Racings Rexy the Porsche 911 GT3 Rawr in Grand Touring Daytona Pro (GTD PRO) or Spike the LMP2 (Le Mans Prototype 2) Dragon which resonate especially with the youngest IMSA fans Pfaff Motorsports various plaid machinery over the years, or the throaty rumble of Cadillacs, Corvettes and Ford Mustangs, many cars have endeared themselves to IMSA fans.

Come the Mobil 1 Twelve Hours of Sebring, theres a good chance the new Aston Martin Valkyrie and its screaming V12 engine will become another fan favorite. The No. 23 Aston Martin THOR Valkyrie was impossible to miss in Wednesdays test sessions at Sebring International Raceway with an easy-to-distinguish sound that could be picked up long before the car came into view on the racetrack.

We made a bit of adjustment to the silencing on the car, and everyone keeps coming up and congratulating me so I think weve moved in the right direction, said Aston Martin THOR Team Principal Ian James. It sounds glorious out there! You dont need the tracker to find where it is on track. GT guys are like, We love it when this car overtakes us.

For driver Roman De Angelis, who is sharing the No. 23 Valkyrie for the remainder of the WeatherTech Championship season with Ross Gunn and with Alex Riberas for the remaining IMSA Michelin Endurance Cup rounds the sound of the Valkyrie takes him back to his days as a race fan watching his father, Max, race in Prototype Challenge.

Im going to go back and say when I was younger, I looked forward to seeing my dad racing in IMSA, De Angelis recalled.  I remember Aston has built an LMP1 car, which Muscle Milk was running in IMSA, and that was a V12 Id go to the side of the track, at (age) 10 and 11, just to see that car, because it was the best sounding car, and I think that kind of sparked a love and a passion for IMSA and that style of racing.

My goal was always sports car racing, endurance racing. I think its memories like that that sparked my interest. Kind of taking a step back, for me it was only 10-12 years ago, but I hope theres people in that position that see it and hear it and its a pretty cool story. Obviously, its a beautiful car and its done well in the sport as well Hopefully theres some people and I was in their shoes 10 or 12 years ago and it kind of sparks a passion for sports car racing for them and maybe theyll be in that position.

To be fair, theres still work to be done for the cars pace and on-track performance to match the sound it was some two-and-a-half seconds off the quickest time in GTP on Wednesday but the team is making strides.

We started with one GT3 car in 2020, James said. Our goal was to maybe we get one top five, one podium, and wed be happy. A win wed be ecstatic. Now were a regular contender for wins in GT classes and were respected for that.

Its the same kind of journey (with the Valkyrie). A podium before the end of the year would be awesome. We dont have any set goals in terms of what we have to achieve. Incremental improvements would be the goal.

Jaminet Quickest on Day 2 of Sebring IMSA Test in No. 6 Porsche

Porsche Penske Motorsports momentum from its 2024 IMSA WeatherTech SportsCar Championship-winning effort and a 2025 season-opening victory in last months Rolex 24 At Daytona continued in IMSA-sanctioned testing Wednesday at Sebring International Raceway.

Mathieu Jaminet finished the day atop the time charts in the No. 6 Porsche Penske Motorsport Porsche 963 on the strength of a best lap of 1 minute, 48.465 seconds (124.131 mph) set in the first of the days three testing sessions. Jaminet was 0.592 seconds faster than second-fastest Scott Dixon, who turned in a best lap of 1:49.057 in the second session of the day in the No. 60 Acura Meyer Shank Racing with Curb Agajanian Acura ARX-06.

Jaminet was also quickest in night testing, putting up a best time of 1:48.836 in the No. 6 machine hes sharing with Matt Campbell, Kevin Estre and for this test IndyCar star Scott McLaughlin.

It felt good in the car, honestly, straight away in the morning, Jaminet said. When I started, the car felt in a decent window. I think we could go through our program. We had quite a bit test list of items, new things we wanted to try. It was a busy day, to be honest. It was good to give some laps to Kevin, who hasnt been here in two years.

The car feels alright. Obviously, its nice to be on the top of the time sheet, but you never know if the others are playing some games and the programs of the different people. But lets say from our side, yes, Car 6 seems to be working well. Were pretty happy with our car and how the day went for sure.

Overall, the top eight cars in GTP were covered by less than one second on the combined time sheet.

In Le Mans Prototype 2 (LMP2), reigning WeatherTech Championship class champion Tom Dillmann led the way, clocking a best lap of 1:50.065 in the No. 43 Inter Europol Competition ORECA LMP2 07 he is sharing with co-drivers Bijoy Garg and Jon Field.

For the second consecutive day, the Grand Touring Daytona (GTD) class was quickest of the two GT classes led by Maxi Goetz in the No. 32 Korthoff Competition Motors Mercedes-AMG GT3. Goetz best lap of 2:00.867 came in the Wednesday evening session in the car he shares with Kenton Koch and Seth Lucas.

Jesse Krohn led GTD PRO in the No. 48 Paul Miller Racing BMW M4 GT3 EVO he shares with Dan Harper and Max Hesse. Krohns best lap posted Wednesday afternoon was 2:02.237.

A total of 39 cars participated in testing on Wednesday with only the No. 14 Vasser Sullivan Lexus RC F GT3 sitting out the days activities after running on Tuesday. Testing concludes Thursday with two more sessions for only the GTP and LMP2 classes.