Toyota tests a new rear wing for the 2022 GR Yaris Rally1

Only two days after the ending of the 2021 WRC season and teams have come back to work to prepare the new generation of cars. Both Toyota and MSport started today new series of development tests in France. The most significant was that several new aero parts were tested in the Toyota GR Yaris Rally1 driven today by Kalle Rovanperä and Jonne Halttunen, which are worth reviewing.

K.Rovanperä/J.Halttunen, Toyota GR Yaris Rally1, development test, France – image extracted from La Passion 05 video

The major and most visible modification was the introduction of a new rear wing. While in all tests till today the car was equipped with the rear wing of the 2021 Yaris WRC, today a new wing was introduced for the test. One of the main characteristics of the new wing is that it is wider, and the side winglets (a, in the image below) have been significantly reduced in size. Wider means higher front area, which allows generating some more downforce but at the cost of higher drag.

K.Rovanperä/J.Halttunen, Toyota GR Yaris Rally1, development test in Spain (early November) and France (today) – bottom image extracted from La Passion 05 video

Another big modification is the addition of two new swan-neck supports (b) on the external sides of the existing supports, totalling four now. The new supports are wider and look more robust than in the previous design. The upper part of the supports (c), continues to act as vertical fins (such as in the previous design) contributing to generating downforce when cornering, as well as more stability. But also drag increases, due to the presence of the added supports.

Toyota Yaris WRC (left) and GR Yaris Rally1 (right) rear wing – right image extracted from La Passion 05 video

The image above seems to indicate that the new wing is longer than the old one. Per regulation, the rear wing can’t protrude from the rear bumper, but also the rear bumper of the GR Yaris is longer than that of the Yaris WRC, so the longer wing should not be a problem.

It also seems to show that the new wing is lower than the old one. This is probably due to the raised position of the rear lights: the new rear wing is supported over the rear lights, and limited on top by the height of the car’s roof, thus resulting in a lower wing.

K.Rovanperä/J.Halttunen, Toyota GR Yaris Rally1, development test, France – image extracted from La Passion 05 video

The lower plate of the wing is also wider, covering all the space between the endplates, which is longer than in the previous design. Note that the plate is completely flat, while it was round in the previous wing. It happens the same with the lower plate of the new Ford Puma Rally1 car, so probably this is set by the new regulations.

E.Evans/S.Martin, Toyota GR Yaris Rally1, development test, France – image by Julien Pixelrallye

A wider wing with the addition of the new supports means that some more downforce will be obtained, especially in the corners, thus compensating for the absence of the rear diffuser. But at the cost of a higher drag, caused by the new supports, as well as the wider design.

E.Evans/S.Martin, Toyota GR Yaris Rally1, development test, France – image by Julien Pixelrallye

The car shows other modifications, such as the change in the shape of the front air intake above the front bumper, while two small side air intakes are now visible, possibly designed to cool the front brakes.

Another important modification can be found at the front fenders, where the external lip and the side plate on top (acting as an endplate) have been removed. The presence of the lip contributed to channel air towards the rear wing. With the new wing design, where the side winglets have been significantly reduced in size, the importance of this flow is possibly much smaller, allowing the removal of the lips.

Old (left) and new (right) design of the Toyota GR Yaris front fender – images by llluis555 (left) and Julien Pixelrallye (right)

Also, the top of the front fender is now flat, while in the previous design (seen two weeks ago in Central Catalonia test), it was shaped as an inverted wing (see yellow circle in the image below), to generate some more downforce over the front wheels. Most probably, the final design will include some of these features, although discarded in the last test.

Old (left) and new (right) design of the Toyota GR Yaris front fender – images by Nacho Mateo/Motoresport.cat (left) and Julien Pixelrallye (right)

The introduction of new modifications is a clear sign that the new season is very close, and the time for testing the final designs is limited. Test by test, the new car is defined, and soon will have the full picture to compare.

 

2 thoughts on “Toyota tests a new rear wing for the 2022 GR Yaris Rally1

  • 2021-11-23 at 20:01
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    Did the hybrid cooling ducts at the real also get smaller? It looks it to me but as you say the images aren’t ideal for comparisons yet.

    Reply
    • 2021-11-23 at 20:46
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      I think they are the same size as in the previous test, two weeks ago in Central Catalonia. But those were smaller than in the previous tests, in Finland, France and Portugal. You can distinguish them because the bigger ones reached almost half of the side window, while the new ones only arrive at the lower end of the window.

      Reply

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