Ferrari has brought a big upgrade package to the United States, but failed to produce enough parts for both drivers so Vettel and Raikkonen used different diffuser specifications.
Diffusers are about 2.2 times bigger this year as they start to rise earlier (175 mm in front of the rear axle, last year on the rear axle), and measures a higher height (175 instead of 125 mm) and width (1050 instead of 1000 mm).
For this reason, the performance of this part of the car is even more important than before, and teams such as Red Bull, McLaren, Renault, Force India and Ferrari use very high rear ride heights to increase the diffuser volume.
Ferrari’s new diffuser was tested for the first time in Hungary test and they tested a very similar version in Austin. The main difference is the bigger, more aggressive central section with a greater angle at which the central part of the gearbox is raised.
As the team free up more space and achieve more advantageous aerodynamic shape, the diffuser will be larger and theoretically produce more downforce if the appropriate air velocity in that section is achieved.
Monkey seat, central, 20 cm wide curved wing, which consisted of three elements in this race and on Vettel and Raikkonen’s car, helps to connect the airflow from the rear wing and diffuser.
As part of these changes, Ferrari brought the front wing with modified endplates and reduced the number of slots on the floor in front of the rear wheels.