I am using a pinto suspension, a chevy power steering pump, and a 94 Mustang steering rack. I wanted to know if I need to use a volume reducer in the newer mustang rack?
I've read post saying that you need to use one on mustang 2 rack but nothing on newer racks.
The reason for using the 94 rack is because it was free and it was wider so I didn't need to expend it to work. Just need to know I need a volume reducer?
The rack works perfectly in the truck just needed to know if I need to reduce the pressure before I do any damage to the seals. I'm always concerned with safety the main reason for using it is because its the perfect size.
After rereading the original post I see he refers to volumn. I'm pretty sure he means pressure as the gm pump puts out I think over 1000 lbs. pressure and the MII rack needs less around 8-900 lbs . Don't qoute me on exact #'s. A search on this forum will turn up a lot of info as this has been discussed many times. :welcome:
Typically to be very effective you need to reduce volume and pressure. I use the P/S valve for the same pump from a 4 cylinder car, it has a small orifice. Then adjust the shim pack to reduce spring pressure. That is the inexpensive way to go.
What is needed to connect a GM p/s pump, rated at 3gpm, to a Mustang II rack, using 2 gpm, is a flow control valve. Speedway Motors has them, under $20, when I bought mine. It screws into the back of the p/s pump, replacing the control valve already in use. I have a the same set up and it cured my problem. Problem known as the "twitch" commonly caused by mating a GM pump to a Ford rack.
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