I am trying to reduce the pressure in my power steering pump as well as it's force to the wheels to somewhere between 25 and 45% of it's current strength. I am also thinking I may want to modify the restrictor which cuts off flow at high rpms so that under 2000 it is a little stronger for parking lot manuevers and such but over 2000 gets a little stiffer but from there maintains an even restriction. I am thinking this may be possible by elongating the holes on the sides or increasing the diameter of the middle hole and adjusting the spring pressure. Since the restrictor restricts flow more than pressure I would also like to lower the pressure to increase feedback and reduce steering force to the wheels while going straight and big wide open corners. I wanted to upload a photo to make my questions clearer and easier to understand. My first one (I know I should have a real manual but I could barely afford the new line that started this endevor) I was wondering if anybody has a detailed schematic of the pump. My second question would be easier to answer with my picture (I will try to upload it again later). If you remove the apperatus that has the restrictor in it there is something else that is simalar underneath it. It is pushed up by a spring and sits up against the restrictor. I don't understand how this could be the pressure bypass but it is the only thing in the pump that even looks like it could be the bypass, Unless the pressure bypass isn't in the pump. If this is the bypass putting a softer spring in would lower the overall pressure in the system right? If this is not the bypass where is it, and would putting a softer spring in work? My third question is for the restrictor that is usually disabled altogether. I am guessing there is a notch that under low pressure the four holes line up with and are able to flow fluid through. As pressure increases the holes must be pushed past the notch. I am thinking that if you put a spring in that compressed around 2000 rmp and elongated one, two, or three of the holes downward then once it hit 2000 rpms or so is would be restritcting the flow as much as it can so it won't get worse at high RPMs. Or I could use a softer spring and bore out the middle hole a little to get better flow when it is completly closed. Any sugestions which way to go? This experiment is taking place on a spare pump so if I mess things up I won't be too sad.