Power Driven 4BT 025 Delivery Valves for Cummins

Power Driven 4BT 025 Delivery Valves for Cummins
 
4BT 025 Delivery Valves
Power Driven 4BT Cummins Engine 025 Delivery Valves are for those who want a little more power than the 055s can produce but with less smoke/heat than the 7 mm. Capable of flowing an additional 65 cc over the stock pump, these delivery valves have the potential to produce 100 hp over stock while retaining manageable EGTs.
 
What Is a Delivery Valve?
When it comes to the fuel side of things, 3 aspects of the P-pumped trucks determine how much power can be produced: the injection pump itself, the fuel injectors, and the delivery valves. In the P7100 pump, the delivery valves are essentially "check valves" installed between the pump and the injector, controlling the overall amount of fuel that goes into the injector before it is sprayed into the piston bowl. Consequently, a larger delivery valve allows a longer duration of the injection event, thereby increasing potential power. There is a tradeoff, however; as a larger delivery valve increases duration, it results in a longer, less efficient injection event. While the increase in flow does produce more power, it does so at the expense of heat and smoke. A smaller delivery valve paired with the same injector will have a shorter injection event. This results in a clean and concise burn, which will make less power but will ultimately drop EGTs and be more efficient. As a final note, stock/small delivery valves become restrictions around 3,000 rpm, where a larger delivery valve will maintain peak flow throughout the rpm range. This is a must for those seeking high-rpm power.