fuel pressure at 8psi
I was trying to explain this jet if your had it on any leg? The video said this was a return model. I dont know why it would have this if it were not to restrict something. Dead head option would have a plug here.
View attachment 1715180744
That ball is the valve seperating full pressure in and regulated pressure out. IIRC, the fuel pressure coming in wants to unseat that ball and flow past it. The spring on top is forcing the ball to seat onto the fuel port, eventually the pressure will unseat it and fuel will flow. The spring pressure can be adjusted for more or less seating pressure. The boost reference barb just injects high boost pressure into the spring cavity to simulate a higher tension on the regulator spring for higher fuel pressure under boost.
I was trying to explain this jet if your had it on any leg? The video said this was a return model. I dont know why it would have this if it were not to restrict something. Dead head option would have a plug here.
View attachment 1715180744
That ball is the valve seperating full pressure in and regulated pressure out. IIRC, the fuel pressure coming in wants to unseat that ball and flow past it. The spring on top is forcing the ball to seat onto the fuel port, eventually the pressure will unseat it and fuel will flow. The spring pressure can be adjusted for more or less seating pressure. The boost reference barb just injects high boost pressure into the spring cavity to simulate a higher tension on the regulator spring for higher fuel pressure under boost.