FastRam Earlier Perkins engines featured the unique Quadram combustion system which achieved two seemingly incompatible goals: reduced fuel consumption and noise, with increased power and torque. FastRam takes this innovation another step into the future, other manufacturers reduce emissions by using very high-pressure injection systems, we however, have developed a method that benefits from our strength as the acknowledged masters of in-cylinder air management. The advantage to the user is that FastRam reduces the environmental impact of diesel emissions, yet actually delivers increased work effort without fuel penalty. The re-entrant FastRam combustion chamber takes air pre-conditioned by swirl induced within the cylinder head; then, during compression, the conditioned air accelerates over the piston crown to enter the combustion chamber at very high velocity.

The unique shape of the FastRam chamber turns this swirling, energetic air into areas of macro- and micro-turbulence, ready to receive and burn fuel. The benefit of the FastRam process is that the pre-mix burn period is reduced, while the diffusion burning phase is faster. The result is that injection occurs later and peak temperatures are reduced. And because more fuel is converted to energy, less is wasted in exhaust gases. So the user gets power and economy and the environment is subjected to reduced levels of nitrogen oxides, hydrocarbons, particulate and carbon monoxide. As if these benefits were not enough, FastRam gives the user two more. Any combustion creates noise and stress on engine components. But the FastRam system controls combustion very precisely. So the ignition delay period - between the start of injection and the start of combustion - is shortened. And because the rate of cylinder pressure rise is lower, as is peak cylinder pressure, FastRam engines are a lot quieter than the earlier ranges. Finally, low peak pressure means reduced mechanical stress - yet another factor which contributes to the longer engine life of FastRam engines.