Power Steering lines

gpbullock
Mark Bullock
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gpbullock

Power Steering lines
June 02, 2008 03:07PM

Registered: 03/13/2008
Posts: 108

Looking for suggestions for min. heat and pressure rating for a stainless braid or cloth/rubber power steering lines. None of my catalogs mention specifically for power steering just fuel, brakes and such. Is steering considered hydraulic pulse?

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gpbullock
Mark Bullock
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gpbullock

Re: Power Steering lines
June 02, 2008 07:22PM

Registered: 03/13/2008
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Ok, found an installation guide. for the supply from the pump to the rack they are recommending 2000 psi operating, with 9000 min. for burst. They don't mention the return, so they are probably less. Hm.

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Pete
Pete Remner
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Pete

Re: Power Steering lines
June 02, 2008 08:50PM

Registered: 01/11/2006
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Return lines SHOULD be zero-pressure.

9000psi. Holy crap.

Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

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gpbullock
Mark Bullock
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gpbullock

Re: Power Steering lines
June 02, 2008 09:14PM

Registered: 03/13/2008
Posts: 108

Yep. Just as I was reading this I saw the note for the return. Low pressure cloth braid pushloc.

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Ascona73
Bob Legere
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Rally Car:
1971 Opel Ascona

Ascona73

Re: Power Steering lines
June 03, 2008 01:08PM

Registered: 03/07/2007
Posts: 308

Pete Wrote:
-------------------------------------------------------

> 9000psi. Holy crap.

I'm inclined to believe they can get that high!

A friend of mine runs an Impreza in NASA road racing. He has an EG33 Subaru SVX 6-cylinder swap, and runs the stock SVX power steering pump with a remote reservoir. At Pocono this past weekend a piece of debris clogged the power steering pump pickup and the resulting pressure spike physically blew apart the pump...not the hoses!

Bob

Opel is a 4-letter word...
http://www.flickr.com/photos/10498579@N07/sets/

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Pete
Pete Remner
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Pete

Re: Power Steering lines
June 05, 2008 04:55PM

Registered: 01/11/2006
Posts: 2,022

And here I thought that the pressure blow-off for most P/S pumps was in the 500psi range.

Time to hit those books again.

Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

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gpbullock
Mark Bullock
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gpbullock

Re: Power Steering lines
June 06, 2008 10:44AM

Registered: 03/13/2008
Posts: 108

I'm not sure what the stock ratings are. Our focus had hard lines but after we blew the rack we had the rack modified to take AN fittings, the internals were cnc'd to speed up the rack response, not the ratio, we added a larger resevoir which doubled the amount of ps fluid it will hold, and also added a high performance pump for more flow. We had it all mods done at Howe Performance Power steering. We have an AN10 from the res. to the pump, AN6 High Pressure (2000 op. 9000 burst) from the pump to the rack, and AN8's from the rack to the cooler to the res. in low pressure cloth braid. The flow rate is basically tripled and the resevoir is doubled over stock. The flow pressure is increased to the rack and the larger lines leaving pull more fluid out of the rack quicker. Just don't want to see any more overheating and blowing of expensive racks any more,...hopefully. Also added a 1.5 to 1 quickener. After this I hope to not need to do anything else to the car until after something else breaks.