12v 2nd Gen Cummins Fuel Injector Nozzles
Our most popular option for thousands of customers, our line of injector nozzles are the same nozzles we use on our injectors. Available only in the most popular spray pattern. We recommend that you select the option for nozzle prep so they come the same way we install them in our injectors.
5-hole vs. 6-hole vs. 7 hole Injectors
Like countless others, you may be wondering what the difference is between all of the injector sizes/hole counts and surfing the internet to find the answer can often lead to more confusion. We’re here to shed some light on the matter.
Per a given flow amount, an injector with a smaller hole count and larger orifice size will penetrate deeper into the piston bowl. Depending on the rpm for the application, this could be an advantage or a drawback. An injector of the same flow with a larger hole count and smaller orifice size will produce a finer spray and penetrate less deeply into the bowl, meaning that it will burn sooner at lower rpm/boost levels.
The real world effects of this seem to come in the form of burn efficiency at a given rpm. At low rpm, the 7-hole better disperses fuel into the air charge which results in increased burn efficiency (more power). There is a cross-over point around 2000rpm where the deeper penetration of the 5-hole injector results in better fuel dispersion into the increasingly turbulent air charge, enabling a more complete burn which results in more power. While apparent, these differences are minimal until 3000rpm. The 5-hole style injector is by far the most common and is the best choice for most applications.