GR GT3 Gets Its Race Lessons Early at Motegi

A concept car in a race, not a test session

Toyota's new GR GT3 is heading into the Motegi SUPER GT finale this weekend, and the most useful information so far has come from a single Friday practice session. Hiroaki Ishiura, one of the car's main development drivers, says the decision to race it early in concept form has already paid off. Running it in a real race environment, he argues, exposes things that laps on a test day simply don't.

Rookie Racing is the team carrying the project. It will be the first to race the GR GT3, which Toyota plans to roll out in various championships worldwide next season. Rookie is running the car in concept form in place of the Mercedes-AMG GT3 Evo it has campaigned until now, which gives Toyota a rare chance to collect real-world data before the car reaches customers.

Where the car stands on pace

The numbers from Friday are modest. Ishiura and co-driver Tokiya Suzuki set the car's fastest time of 1:49.638 over 30 laps in the morning's only practice session. That left the GR GT3 28th and last in the GT300 class, 2.821 seconds behind the pace-setting Subaru BRZ and roughly three tenths off the next-slowest car.

Those gaps matter less than they look. The car is entered as an open entry, so Ishiura and Suzuki can't score drivers' points in either of the two 250km races. For a team that has run the AMG all season, a debut in a car still being sorted out is a very different exercise from chasing results, and the timing sheet alone won't show how much the car is learning.

What the first session turned up

Ishiura was specific about what the running has revealed. The biggest surprise was in the cockpit controls. "You need to make sure there is a proper locking mechanism, otherwise it won't immediately return to the correct setting for each driver," he said. In private testing, he had simply set the pedals to suit himself. Once drivers are swapping quickly, as they do in a race weekend, that shortcut stops working and a proper mechanism becomes essential.

Grid procedure was another eye-opener. Pulling away from the pit garage on the green light, with the steering already on full lock, is a manoeuvre the team hadn't practised with the clutch in that exact state during testing. Ishiura also pointed to mirror visibility and sightlines, which are hard to judge when you've been running alone. Dicing with rivals gave him a fresh view of how competitors look from the cockpit, and that kind of feedback is difficult to get without other cars on track.

His overall read was clear: "It really highlights the immense value of participating in a race environment, as opposed to just standard testing."

Comparing it with the AMG

Ishiura was careful about direct comparisons. "I can't directly compare, but the sensation while driving is quite different to normal," he said. Part of that difference comes from the rules the car is built to. Ride height limits, for instance, shape how the aero performs, so the GR GT3 won't behave like a car designed under the regulations Rookie has been using. He described the car as featuring some of the latest aerodynamics seen on a GT3, though he stopped short of ranking it against the field.

The comfort level seemed to matter more to him than the raw numbers. He said there was "no sense of discomfort while driving" and that, having driven many different cars, nothing about this one stood out as especially difficult. For a development driver, that's a useful early signal, because a car that works with the driver is easier to refine.

Giving up the title fight for a bigger chance

The open-entry status also ends whatever remained of Rookie's outside hopes in the GT300 championship. Ishiura trailed leaders Joao Paulo de Oliveira and Iori Kimura by 31 points with 52 still available, so the points route was effectively closed. He said that didn't bother him much.

His reasoning rests on the team's first season in GT300. "We have proven we can fight at the front in our first year," he said. "Of course, there are still many areas where we are lacking, but we have reached the level we hoped for, so now we are moving on to the next challenge by racing a concept car in the final round." Given the attention the GR GT3 has drawn, he framed being first to race it as the bigger prize. "As a racing driver, chances like this don't come around very often," he said, adding that if he'd had to choose, he would have picked this route anyway.

Why Motegi, and why SUPER GT

Toyota could have chosen a different stage. GR GT project manager Takashi Doi explained that the team picked the SUPER GT round over next week's Super Taikyu final at Fuji Speedway, where unhomologated cars are more commonly seen. The decision was made in discussion with Rookie Racing, and Doi said the team weighed several options before settling on SUPER GT. "Ultimately, we decided that it was better to debut the car in SUPER GT, where there are many GT3 cars running together," he said.

That choice shapes what the data will mean. A field of GT3 machinery gives the team a direct benchmark, and the traffic and proximity of rivals test the car in ways a quieter event can't. The tradeoff is visibility: Toyota is putting an unfinished package in front of a demanding crowd, and the results will be read against the strongest cars in the class.

What to watch next

The next step is simple to describe and hard to execute: take the lessons from Motegi, fix the controls and procedures that didn't work, and see how much of the gap to the front closes on race day. Ishiura's comments suggest the team's focus is on process as much as lap time. If the pedal mechanism, grid routine and sightline feedback are sorted quickly, the GR GT3 will arrive at its customer-facing championships with a clearer picture of what it needs. That's the real payoff of an early debut, and it's why this weekend's 28th-place timing sheet may end up meaning less than the notes the team takes home.