Confusion over the blown diffuser at Silverstone!

Since yesterday, the paddock at Silverstone has been shaken by a controversy surrounding the regulations of blown diffusers. Initially, the FIA had indicated that the throttle opening during braking could not exceed 10% at 12,000 RPM and 20% at 18,000 RPM.

The different engine manufacturers, led by Mercedes and Renault, had objected, explaining that the reliability of their engines could be compromised by such measures. To which Charlie Whiting responded that he would analyze the situation and that the limit could be revised based on the engines’ characteristics.

Reflection that led to tailored regulation with teams powered by Renault allowed to keep a 50% opening at 18,000 RPM and those from the Mercedes clan injecting fuel into half of the cylinders (i.e., 4) during braking.

This situation led to a verbal joust between Christian Horner and Martin Whitmarsh during a press conference yesterday, with each one believing that the regulations favored the other.

This morning, the FIA, through the voice of Charlie Whiting, once again addressed the issue by maintaining the authorization for Mercedes to inject fuel into half of the cylinders, while Renault can no longer use a 50% opening of the throttle valves. This umpteenth change of course by the International Federation obviously does not please Christian Horner, who went to the FIA motorhome to seek explanations from Whiting. The Red Bull Racing team principal was joined by Adrian Newey, designer of the RB7, who had been very critical on the subject at the beginning of the weekend, not understanding why the rules were being changed in the middle of the championship. Another reversal of the situation before this afternoon’s qualifying cannot be ruled out.

If Mercedes and Renault are competing through teams, it’s surprising to note that Ferrari hasn’t made any comments on the matter. In any case, the management of this thorny issue by the FIA can only be lamented.