Toyota Yaris WRC first tests for 2018

Toyota Gazoo Racing WRT Team has started the test programme for the development of new modifications for the 2018 Yaris WRC. Tests have taken place in a gravel stage near Almeria, in Southern Spain, with Esapekka Lappi at the wheel. The modifications evaluated on these tests face some of the problems the car has undergone during the present season, such as lack of aerodynamical balance between front and rear or poor cooling capacity.

The most significant change has been the addition of a second dive plane in the front bumper, while the existing (lower) one has been enlarged.

yaris front view lappi almeria fernando cruz small Courtesy of Fernando Cruz (www.diarioracing.com)

E.Lappi/J.Ferm, Toyota Yaris WRC, Test in Almeria, Spain, November 2017

Top dive plane has been installed instead of the lip present in the 2017 version of the car, as the body of the car has been narrowed.

The second significant modification is the increase in the size of the frontal air inlet, which has now a bigger, inverse trapezoidal shape. Comparison with the picture below from recent Wales Rally show the differences for both modifications.

comparative

Pictures by Fernando Cruz (top) and Lukasz Mikulski (down)

E.Lappi/J.Ferm, Toyota Yaris WRC, Test in Almeria, Spain, November 2017

J.M.Latvala/M.Anttila, Toyota Yaris WRC, 2017 Wales Rally, 5th

Side pictures show also other modifications tested in Almeria. First one is the redesign of the front wheel arch, which has now a top hole for additional air removal. By removing air from the wheel space, still lower pressure is obtained below the car. In front of these holes, a small wing has been added, as a prolongation of upper dive planes, to help air flow upwards, thus contributing to increase pressure on front axis from above. Also, it prevents frontal airflow to collide with air escaping from the wheel space, which would have resulted in higher drag. The combination of lower pressure below and higher pressure above gives as a result higher downforce.

yaris side view lappi almeria fernando cruz.jpg

Courtesy of Fernando Cruz (www.diarioracing.com)

E.Lappi/J.Ferm, Toyota Yaris WRC, Test in Almeria, Spain, November 2017

lappi wales bogdan barabas

Picture by Bogdan Baranas

E.Lappi/J.Ferm, Toyota Yaris WRC, 2017 Wales Rally, 9th

Side view shows clearly the increase in size of new dive planes. Also the presence of a small lip on the top one, similar to those used by Hyundai in 2017. These new dive planes will help to increase downforce at the front of the car, thus allowing to equilibrate excellent amount of downforce the rear wing supplies to the car, which at the end means better handling and faster turning in bends.

yaris side 2 lappi almeria fernando cruz

Courtesy of Fernando Cruz (www.diarioracing.com)

E.Lappi/J.Ferm, Toyota Yaris WRC, Test in Almeria, Spain, November 2017

New pictures (by CulturaRacing.es) from the second test day, with Juho Hanninen, show that louvres have been added to the air outlet of the front wheel, similar to those used in the rear wheels. Although top louvres are not horizontal, as they are designed to send air upwards, through the new hole on top of the arch. The image also shows the rear view of the small wing on top of the arch.

Yaris Hanninen Almeria nov2017Courtesy of JuanGa RR (CulturaRacing.es)

J.Hanninen/???, Toyota Yaris WRC, Test in Almeria, Spain, November 2017

Just two side small louvres were used in the original air outlet of the front wheel arch in the car configuration used in the present season.

AUTOMOBILE: WRC Deutschland - WRC -16/08/2017courtesy of Michelin

JM.Latvala/M.Anttila, Toyota Yaris WRC, ADAC Rally Deutschland 2017, 7th

Pictures do not show any modification on the rear part of the car. But it is only the first test for 2018, so there is still time for additional modifications to be tested.

Also, Citroen test in Spain last October (see here) allowed to see some of the modifications the French team is considering for 2018, while Hyundai already implemented in the last rallies of the season the modifications they tested in Spain in September (see here) and in Wales in October (see here).

 

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