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I know there's been a thread about electric and electric/hydraulic conversions but I haven't seen anything about alternative conventional power steering pumps. I looked at the pumps from the SOHC S13, DOHC S13 and S14, as well as the Z32 NA versions. The SOHC S13 and Z32 NA pumps look the same but the Z32 has a higher pressure spec (1200psi vs 1000). The S13 DOHC and S14 look the same but the S14 has a higher pressure spec (1300 vs 1100). The only major external difference is that the discharge on the SOHC/Z32 NA version is pointing the opposite direction of the DOHC versions. I haven't found any info on the displacement of the pumps so that's a black hole for now. The pressures and operating flow rates are controlled by the relief valve/spool in the discharge of the pumps and are probably interchangeable.
I did a google image search for aluminum power steering pumps and found that the KRC brand of racing pumps looks just like the DOHC S13/S14 pump. They have aluminum pumps with displacements of 5.9cc, 7.2cc and 9.6cc capable of running up to 9000 rpm. They also offer a number of different reliefs and spools valves for pressures up to 1600psi and flows up to 3.3gpm. The 5.9cc is the "superspeedway" model, the 7.2cc is their "standard" version and the 9.6cc is the "high capacity" model for dirt late models, cars with "quickeners" and for marine applications.
I've been running Redline synthetic in my S13 pump but I still notice that I occasionally "run out" of power steering in quick/tight sections of autocross. It could be a failing pump, as it's started making noises. I had planned on getting stuff together to do a pressure test, but since it's started making noise I'll probably just replace it. The class I run in now doesn't allow add-on coolers or different pumps but I'm probably going to a class that does next year. Has anyone run across pump displacement or flow spec's for the 240sx anywhere? The FSM only has pressure spec's.
I did a google image search for aluminum power steering pumps and found that the KRC brand of racing pumps looks just like the DOHC S13/S14 pump. They have aluminum pumps with displacements of 5.9cc, 7.2cc and 9.6cc capable of running up to 9000 rpm. They also offer a number of different reliefs and spools valves for pressures up to 1600psi and flows up to 3.3gpm. The 5.9cc is the "superspeedway" model, the 7.2cc is their "standard" version and the 9.6cc is the "high capacity" model for dirt late models, cars with "quickeners" and for marine applications.
I've been running Redline synthetic in my S13 pump but I still notice that I occasionally "run out" of power steering in quick/tight sections of autocross. It could be a failing pump, as it's started making noises. I had planned on getting stuff together to do a pressure test, but since it's started making noise I'll probably just replace it. The class I run in now doesn't allow add-on coolers or different pumps but I'm probably going to a class that does next year. Has anyone run across pump displacement or flow spec's for the 240sx anywhere? The FSM only has pressure spec's.
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