 They are not the first "4 valves per cylinder" or the first "dual overhead cam head," but they are the first in the world to combine the two techniques.All the most powerful racing engines, to the current Formula 1 recapitulate this formula, which is now becoming universal in production automobiles.In 1913, the 5.6 liter and 3 liter engines were further developed with camshaft timing, previously carried by shaft and bevel, now carried out by a cascade of gears, and lubrication was amended by adding a dry sump.