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Toyota lifts lid on close to “unimaginable” mission to improve its WRC automotive
Rally

Toyota lifts lid on close to “unimaginable” mission to improve its WRC automotive

By Miles Cooper January 31, 2025
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Toyota needed to pull “some favours and tips” to finish the just about “unimaginable” job of upgrading its World Rally Championship automotive following a late change in rules for 2025.

The reigning WRC producers’ champion efficiently debuted updates to its GR Yaris, which required spending three homologation jokers in Monte Carlo final week.

A late change within the rules final yr to maneuver away from hybrid energy and scale back the air restrictor to 35mm for 2025 compelled Toyota to take motion and deviate from its supposed 2025 growth plan for its automotive.

In accordance with technical director Tom Fowler, the staff had six to eight weeks to finish its upgrades in time for Monte Carlo however managed to drag off the feat due to a “large collaboration” between departments and suppliers.

In that interval, Toyota was capable of improve its engine, camshafts, exhaust manifold and produce new gear ratios having initially supposed to improve its differential – a growth that has been frozen following the lack of hybrid energy.

“The necessary factor from the staff is that we discovered with a most of six to eight weeks remaining that growth needed to change and we managed to do new camshafts, new exhaust manifold and 5 gear ratios in that point,” Fowler advised chosen media together with Motorsport.com.

Toyota lifts lid on close to “unimaginable” mission to improve its WRC automotive

Sébastien Ogier, Vincent Landais, Toyota Gazoo Racing WRT Toyota GR Yaris Rally1

Photograph by: Toyota Racing

“It was a giant collaboration between engine division, transmission division and provider to make that occur.

“For those who write down the time it takes to make these gears, make these manifold components and to grind camshafts, if you happen to use all the usual supply instances it’s unimaginable, so we actually needed to pull some favours and tips to get that performed. It’s testomony to our engineers and our designers that it occurred.

“In case you have a smaller restrictor then your engine traits change principally across the rev vary, so it turns into extra necessary to make use of the rpm decrease than earlier than which impacts the tuning of the engine, so the engine jokers had been modified on the final minute.

“We all the time have a brand new engine for Monte Carlo and we modified the event plan in October and November final yr when the restrictor measurement was coming as information.

“We did some camshafts and an exhaust manifold that are tuned particularly for the brand new consumption measurement. In order that’s two jokers on the engine for these components.

“Then on the identical time, we used a chassis joker to vary the gear ratios within the gearbox and once more that was a last-minute change as we’re not planning to do this.”

The entire upgrades had been fitted to 3 of the 5 GR Yaris in Monte Carlo with Takamoto Katsuta and Sami Pajari set to obtain the total 2025 package deal at a later date.

It proved to be a profitable debut for the staff as Sebastian Ogier and Elfyn Evans headed a one-two with Kalle Rovanpera ending fourth.

Watch: Rallye Monte-Carlo Wolf Energy Stage highlights

On this article

Tom Howard

WRC

Toyota Racing

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