All is supplied by the piston driven, fuel transfer pump forcing 45 lbs. of fuel pressure to the injection pump (fuel cavity). The barrel and plungers take only what they need and the rest, along with air foam, is forced back to the fuel tank return.

Along with fuel control is the air fuel ration control. This limits the amount of fuel being delivered to the cylinder during acceleration. Properly adjusted, it reduces exhaust smoke and minimizes soot in the engine.

The automatic timing advance unit advances the fuel injection in the cylinder to the engine timing. This is done by governor weights and springs forcing against engine oil pressure. This unit uses oil pressure to charge or advance fuel injection according to engine speed thus giving you better combustion of fuel at all RPM levels. Generally it works on a 12° rpm span. This means that the more rpm’s you turn, the more advance timing you must get.

In order for this Caterpillar® engine to run efficiently and smoothly, at any horsepower level, and to get good fuel economy, all barrel and plunger pumps must flow the exact amount of fuel at the same time. All the nozzles must flow the exact same amount of fuel at the exact same time.

Our fuel system is second to none for horsepower, fuel economy and reliability. We manufacture our own barrel and plungers for performance and have them heat treated for longevity. Our barrel and plungers are all flowed on our test bench for accuracy of even fuel delivery at the right time. Our nozzles have a wider spray angle for performance and higher pop-off pressures for fuel economy. All nozzles are matched for volume of duel delivery as a set. All fuel pump cam shafts are coated with titanium nitrate to improve the hardness and dimensional stability and increase load carrying capacity.

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