Spring info power steering pump - Team Camaro Tech
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post #1 of 2 (permalink) Old Apr 3rd, 19, 08:50 AM Thread Starter
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Spring info power steering pump

Hello, I have a 69 with hydro boost and close ratio z28 metric gear box. I am configuring the power steering pump following David Pozzi's website directions. I am a little confused now since I purchased a new pump, when I took the pressure control valve apart there was no shims and a way shorter spring then stock. The new spring has same dia and feel or stiffness by touch so I am assuming same rate. Am I to think they pitched the shims to save on mfg cost, and have a short spring with the same rate to increase flow. I.e "less resistance" with enough pressure to run the system.

I believe the thing to do to run my particular set up is open up pump outlet fitting "increase volume" and use my old spring the longer one with "no shims" for "increased pressure". Flow should incrementally go up and pressure should go up to better for running the added hydro boost system and close ratio box.

Any advice is appreciated....


Update; confusion averted I put a fish scale on the springs and the yield the same psi at their compressed length. Moving on...

Last edited by J.P.; Apr 4th, 19 at 07:17 AM.
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post #2 of 2 (permalink) Old Apr 4th, 19, 09:29 PM
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David Pozzi
 
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Re: Spring info power steering pump

Newer pumps do not use shims and are locked in place not fully seated with loctite. It may have enough pressure as-is. If you do change the pressure setting, measure from the "nut" shoulder to the body and vary shims based on that dimension. There are different length pressure valve bodies. I would not interchange any parts between them.



A .140" restriction is common for a fast ratio box. If yours is close to that it may be OK as-is.

Check my web page for First Gen Camaro suspension info:
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Last edited by davidpozzi; Apr 4th, 19 at 09:48 PM.
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