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  #1  
Old 08-09-2015, 06:45 PM
steya steya is online now
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GM Saginaw power steering pressures.

Hi,
Just wondering if anyone knows the supply pressure to the steering box and return pressure back to the steering pump for the old style GM saginaw power steering pumps? Pump is attached to a 1968 small block Aussie Impala. Thanks heaps.
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  #2  
Old 08-09-2015, 09:12 PM
TJS811 TJS811 is offline
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Name: Stoney
The standard rotary wet ps pumps used in passenger vehicles of that era ran between 1,000 and 1,200 psi. Not sure what was actually supplied to the box; some of that pump pressure could be bypassed depending on flow demands.
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Old 09-09-2015, 07:42 AM
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chevguy chevguy is offline
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Some of the gm pumps went as high as 1400psi. Not sure on return. I bought a shim kit recently to drop the pressure back as it made my mustangII rack very light and twitchy. It's a heap better now.
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Old 09-09-2015, 09:13 PM
TJS811 TJS811 is offline
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Ken I think the higher pressure pumps were in models like Suburban and the C/K series.
From memory, the factory Mustang pumps were around 800psi, not surprised it was light.
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Old 10-09-2015, 02:55 PM
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Yeah Stoney that's correct. I dropped the pressure with 3 shims to approx 900psi. It's what they recommended with the kit.
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  #6  
Old 10-09-2015, 10:23 PM
steya steya is online now
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Thanks for the info guys. Cheers.
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