Understood, the proportioning works an adjustable orifice restricting flow, thus initially pressure too. In a closed system like brakes the pressure will eventually equalize on both sides of the orifice.

Right now I just want to find why my pressure isn't where it needs to be on the initial pedal pump.

The proportioning valve is out and the union is in. Have to work tonight so hopefully tomorrow I'll re bleed the fronts and see what I have.

Thanks, Justin.