https://it.motorsport.com/f1/news/f1-fe ... /10829196/
Ferrari insists on a 'hot' engine. The photo taken by AG Foto in the Barcelona garages is as eloquent as ever: the heat exchanger on the SF-26 is less than half the size of Red Bull's. On both cars, the designers have placed the intercoolers above the turbocharged 6-cylinder engine, but the large difference in the volume of each component is striking
The Scuderia, as we had the opportunity to anticipate, has homologated the 067/6 engine, which is able to operate with an intake air temperature of around 100 degrees, while all other units run at values between 60 and 80 degrees.
At Maranello, they developed this innovative concept thanks to the steel alloy cylinder head which, compared to aluminium, is capable of operating with a combustion chamber pressure significantly higher than the competition. The project carried out by Enrico Gualtieri's team is very bold, as well as revolutionary. It is a development path that will not be abandoned with the upgrades that will be brought to the track through the ADUO (Additional Development and Upgrade Opportunities).
According to rumours, the engine that should make its debut at the Austrian GP with the first upgrade permitted by the FIA will significantly increase the temperature of the air entering the intercooler: figures of between 110 and 115 degrees are being mentioned. The goal, in fact, is to improve combustion chamber efficiency by halving the power gap compared to the reference unit: for Maranello, that is the Mercedes W17 E Performance engine, while according to FIA data the most powerful internal combustion engine would be the Red Bull Powertrains Ford DM01.
Either way, on both fronts the gap is around 25 horsepower, and the hope is to reduce the difference to no more than 10 horsepower — to be potentially closed with the second ADUO upgrade — provided the governing body doesn't change its mind following Red Bull's repeated protests, as they do not consider themselves the benchmark at all, given they are running an engine in its debut season in F1.
Ferrari, being able to exploit the characteristics of the 'hot' engine, has made significant concessions to the chassis and aerodynamics teams: the cooling system, requiring less heat exchange to stay within safe reliability ranges, has been designed with smaller radiating masses, which help enable more aggressive aerodynamic shapes. The SF-26 is the only car to feature a triangular airbox without the ears on the sides of the roll hoop."
The FTM system with the flap that allows the hot exhaust gases to be blown also benefits from the advantages provided by the steel alloy head: with the 'plug' active, around 7 horsepower are lost, but the drop in power must be adequately compensated by the increased aerodynamic downforce generated through improved rear wing efficiency and extraction of air from the diffuser.
