DeltaWing, Mazda teams overachieve versus expectations

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Two of the relative underdog teams in the Prototype field at this year’s Rolex 24 at Daytona – the DeltaWing Racing Cars and SpeedSource Mazda teams – overachieved compared to expectations.

In the 18-car field, these two along with the all-gentlemen Highway to Help squads were probably the longest shots to win entering the week. But while the Highway team used a standard Riley DP with Dinan power, both the DeltaWing and Mazda used this year’s Rolex 24 as a testing opportunity for new technologies.

The lightweight, radical DeltaWing was back in its first 24-hour race since the 2012 24 Hours of Le Mans, the race the open-top version of the car made its official debut. But the difference this time around was drastic: an entirely new operating team, crew, car (a coupe version) and tire partner (Continental) made for several new elements as the team took to Daytona for the first time.

The team’s two 2013 full-season drivers, Andy Meyrick and Katherine Legge, were joined by Caterham F1 reserve Alexander Rossi and 2013 Indy Lights runner-up Gabby Chaves in the distinctive, chrome coupe. Rossi commented on the driveability of the car compared to his usual F1 chassis.

“To get the performance out of it, you have to drive it different than a normal car,” Rossi told MotorSportsTalk at Daytona. “The visual references and the like aren’t difficult, but to pull a lap time out, yeah, you have to be a bit creative.”

Rossi, a former Formula BMW champion, was making his first U.S. race start in five or six years. Legge qualified the car eighth overall – ahead of all the P2 chassis – and top of the ALMS 2013 cars making the switch into the TUDOR United SportsCar Championship.

Myriad issues plagued the team throughout the race, notably gearbox, a fuel pump and a small off by Chaves, but in more than 16 hours the car ran 288 laps and more than 1,000 miles. It was the longest outing yet for the Élan-powered prototype, in the team led by managing partner Don Panoz and president/COO Al Speyer.

“First of all, the crew did a terrific job to keep the car going,” Legge said. “This is the longest we’ve ever gone and when I was out on the track, the car was great. Very balanced, very good in traffic. It’s hard not to finish but we know that we are heading in the right direction and it’s just a matter of continuing what we’re doing.”

Mazda could also take positives away from its debut with the Multimatic-built pair of SKYACTIV-D diesel P2 coupes, in a purely learning exercise and something where pace was not going to be achieved from the off.

source: Getty Images
Getty Images

The two coupes – driven by Mazda veterans Sylvain Tremblay, Tom Long, James Hinchcliffe, Joel Miller, Tristan Nunez and Tristan Vautier – plugged away for more than 2,800 miles between them and came up just short of finishing. It represented a major step forward compared to the GX-run Mazda6 diesels that raced Daytona last year, when all three cars retired within the first six hours.

The No. 07 (Miller/Nunez/Vautier) car came within an hour of the finish before an oil-pump belt failure caused a loss of oil pressure.  The No. 70 car (the other three) covered over 1,300 miles before it was retired due to overheating caused by a clogged radiator.

Where the car succeeded was in efficiency, with a 35-percent advantage in range from the SKYACTIV-D engine.  The car also has a high “clean factor,” using a renewable synthetic diesel fuel supplied by Dynamic Fuels.  Mazda Motorsports engineers will now address the radiator and belt issues that sidelined their cars this weekend, and turn their attention to dialing in even more speed as the season progresses.

“Given the limited time we’ve had to develop the new Mazda SKYACTIV-D Clean Diesel prototype, we are very satisfied with the progress our team has achieved,” said John Doonan, Director, Mazda Motorsports. “That said, this is a multi-year development program and we won’t be happy until we start winning.”

Of note here, the Élan engine in the DeltaWing is Mazda MZR-R based, but is not a Mazda block. Either way, both teams press ahead, and seeing development between them will be interesting to monitor as the rest of the TUDOR Championship rolls on.

Supercross 2023: Results and points after Houston

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Eli Tomac led all 23 laps of the Monster Energy Supercross race at NRG Stadium in Houston, Texas and the results show he now has three wins in the season and is one shy of tying Ricky Carmichael’s 48 for third on the all-time list. With this win, he takes a seven point lead in the standings with 12 rounds remaining.

For Tomac at Houston, it was literally a tale of two races. Both his heat and the main started the same with Tomac grabbing the holeshot, but he was passed quickly by Chase Sexton in the heat. Tomac faded quickly after getting passed and was trailing by almost eight seconds at the checkered flag, which caused him to retreat to the hauler and reassess his lines. Without making any adjustments to the bike, Tomac entered the Main with a new attitude, and simply rode better.

Supercross Results Houston
Chase Sexton played it safe in the sand, but he was aggressive in every other turn. – Feld Motor Sports

Sexton had so great a lead in his heat that one could not even use the cliche that he left Tomac in his dust. By the time the rider with the No. 1 plate crossed the same real estate as the No. 23, the dust was well settled. Sexton had a modest start on the initial gate drop and ended Lap 1 in fourth. He worked his way past Aaron Plessinger on Lap 3 and got around Jason Anderson three laps later. Sexton was able to catch Tomac and pressure him, but he picked a safe, i.e. slow line through the sand section and could never get alongside his rival.

RESULTS: Click here for 450 Results; Click here for full 250 East Main Results

After starting the season with back-to-back seventh-place finishes, Anderson now has a pair of podiums. He won his heat and was easily one of the top three riders in the field, ultimately finishing behind the riders who finished 1-2 in the other preliminary. Anderson was subdued on the podium – happy he was there, but disappointed he has not yet found a way around the riders he is chasing in the points.

In the early stages of the race, Plessinger appeared to have a bike capable of winning. He pressured Tomac on the first two laps and was setting up the pass just as a red flag waved for an injury to Dylan Ferrandis that brought out a red flag. He lost second to Anderson on the restart and eventually slipped to fourth to score his first top-five of the season.

Click here for 450 Heat 1 | Heat 2 | Last Chance Qualifier

Cooper Webb rounded out the top five. Along with Sexton, he is now one of just two riders with a sweep of that mark in 2023, but with Tomac’s three wins, he is beginning to slip in the points. Webb sits third in the standings, 12 points behind the leader.

Ken Roczen entered the race as the third rider with a sweep of the top five and progressively better results in the first three races of 2023. Had the pattern held, he would have finished at least second, but he struggled for most of the night, finishing fifth in his heat and eighth in the Main. There may have been extenuating circumstances, however. Ferrandis’ injury was suffered when he landed on the back of Roczen’s bike and potentially damaged the No. 94 Suzuki.

Click here for 450 Main results | Rider Points | Manufacturer Points | Lap Chart


The 250 East division made their 2023 debut in Houston, but the name atop the board was familiar. Hunter Lawrence joined his brother Jett Lawrence as the early points’ leader in their respective divisions, but it didn’t come without a little anxiety.

Riding behind Supercross newbie Tom Vialle on the second lap, Lawrence was forced to take evasive action when the leader pitched his bike sideways to scrub speed over a jump. Lawrence veered left and landed off course, but he cleared the Tuff Blox and kept his bike straight. Lawrence made the pass for the lead on Lap 18 and never relinquished it.

Click here for 250 Heat 1 | Heat 2 | Last Chance Qualifier

In his first attempt on a 250, Max Anstie ascended to the podium. – Feld Motor Sports

England’s Max Anstie made the move from 450s to 250s this year after scoring a best result of 11th on the big bike at Anaheim 2 last year. It didn’t take anytime at all to find the front for Anstie, who finished second in both his heat and main.

It has been a while since Jordon Smith stood on the podium: February 23, 2019 to be exact when he finished that well in Detroit. A series of injuries kept him off the bike for much of 2020 and 2021, but he’s proving to be a factor when he’s healthy.

Click here for 250 Main results | 250 East Rider Points | Combined Rider Points | Lap Chart

There was a lot of hype surrounding the debut of Haiden Deegan in the 250 class and he proved it was merited. He finished fourth in his heat and main. He was as far down as ninth at one point in the feature before slowly picking off riders on his way to the front.

Jeremy Martin finished fifth and now has a streak of three consecutive top-fives to his credit stretching back to last year. Unfortunately, his pair of strong runs in 2022 were interrupted by injury.

Making impressive debuts in the 250 division, Vialle recovered from a fall to finish seventh, Chance Hymas finished eighth, and Talon Hawkins just missed the top 10 with an 11th.

2023 Results

Race 3: Chase Sexton, Levi Kitchen win
Race 2: Eli Tomac, Jett Lawrence win
Round 1: Tomac, Lawrence win

2023 SuperMotocross Power Rankings

Week 3: Ken Roczen takes the top spot
Week 2: Roczen moves up; Chase Sexton falls
Week 1: Eli Tomac tops 450s; Jett Lawrence 250s