The car was equipped with a new set of vanes placed under the front suspension’s lower wishbone at Sakhir . The new set is directly attached onto the chassis while the older version featured two inclined pillars to hold the vanes . The pillar-less version offers a better airflow under the car as the air blocking pillars are now removed . Lastly the new set does not feature anymore the saw-tooth upper profile towards the rear like the older version which helped to reduce turbulence , probably because the new shape offers a cleaner airflow .
Ferrari raced double vents on the rear floor (spotted in front of the rear wheel ) , instead of the previous single one , to increase the amount of air towards the diffuser side channels .
During February test at Barcelona the team introduced new front floor’s side fences . The vertical fence blocks the upper air flow coming from the inner bargeboard-body zone from exiting out of the floor surface and mixing up with the “bleeding” portions of air coming under the chassis . Any contact between the two flow layers would create unwanted turbulence . To reduce drag the old fence featured a small slit . The new fence shape is generally much simpler and it becomes higher towards the rear . Moreover the floor section under the new fence is rising slightly up to ease the air coming out from this point instead of coming later from the back and mixing up with the upper airflow layer . Of course the ideal would be to seal air from exiting under the chassis with curtains but this is forbidden by the rules ( ground effect ) .
Apart form the new fence another evolution took place to the sidepod panel where an additional triangular fin was added to the lower panel surface . This extra fin helps reducing drag by creating vortexes towards the rear of the car .
Ferrari , Launch – Periscope exhausts
Ferrari initially started the season with periscope exhausts while later at Valencia(following Red Bull’s RB6 path ) presented a new exhaust system located lower , close to the floor and inside the rear tyres zone . This new exhaust system configuration called EBD (Exhaust Blown Diffuser ) helps to energize the rear diffuser with hot exhaust emissions boosting downforce production .
Valencia – standard version
At Silverstone and during free testing sessions Ferrari had its EBD pipes cut off at their end to permit a stronger interaction of the hot exhaust gases with the rear side airflow coming around the sidepods bottoms . This configuration was replaced by a new one with elongated pipes towards the rear end to blow hot emissions stronger to the diffuser . The later revision remained for the race .
Silverstone , tested – cut off version
Both specs , the cut off and the elongated pipes configuration , can be considered to be extremities of the original design ( for less and stronger interaction with the diffuser respectively ) .
Silverstone , race – elongated version
Another modification was the addition of a heat protective floor element behind the exhaust outlets covering the rear wheel – car body floor inner zone .
Hockenheim , race – new elongated version
At Hockenheim a new elongated version with cut off inner surface was presented . During free runs the team tested also a modified rear floor configuration with heat metallic covers behind the exhaust outlet but the use of them was later regarded unnecessary and were removed for race to save weight in favor of ballast . Nevertheless despite the removal of the metal covers the rear floor gained an extra thick lighter carbon cover .
Hockenheim , tested – metal heat protective covers