Power Steering

[Laid_Out_50]

If I put a MII in my 1950 truck which comes with rack and pinion do I still need a power steering pump

[Steve@OldSub.com]

It depends on whether you choose a power rack or a manual rack.

[Laid_Out_50]

i chose a power rack does this mean i still need to use a steering box

[Steve@OldSub.com]

If you have power steering of any sort you need a pump to provide the power. If you have a rack you don't need a box. If you have a box you don't need a rack.

A Mustang II is almost always a rack and pinion, and you can choose power or manual, but once you choose power you have to have a pump.

[Laid_Out_50]

Thank you for clarifying that

[Atomsplitter]

And be aware that GM pumps put out about 1200psi and the MII racks use 700-800 psi (I think some of the T-Bird racks use a higher pressure). The high pressure differential makes for twitchy steering.

[63chevyll]

do you think changing the spool valve would let the GM pump work with the Mll Rack?

[Atomsplitter]

If you mean the valve at the outlet of the pump where the hose connects...Yes! Borgenin Steering sells a shim kit for about $20. Each shim drops the pressure 100psi.

Just look for a Borgeson-Mullins shim kit #899001.

[cajundragger]

yup, the kit is super easy to install.

[Laid_Out_50]

trying to find the shim kit but cant find it.

[JML55]

Originally Posted by Laid_Out_50

trying to find the shim kit but cant find it.

try this
http://www.jegs.com/i/Borgeson/153/899001/10002/-1

[63chevyll]

a spool valve from another GM rack car might be worth a try???

[crusinforty]

Hello,

Will the Borgenson kit work on a 2002 LS1 PS pump?

Thanks!

[mr48chev]

Originally Posted by 63chevyll

a spool valve from another GM rack car might be worth a try???

No as they use the higher pressure. There are a few outfits that sell a new reduced pressure spool valve for about 40.00 for running the Saginaw pump with the MII rack.

I'm not sure on that one Cruisinforty but most of the internals of the Saginaw pumps are the same across the board except the spool valve and spring. I went hunting through the net and came up with this.
http://www.hotrodhotline.com/content...ove-components

I think the main difference between pumps is the type 1 or type 2 that Allen Grove mentions.

[mknittle]

Originally Posted by 63chevyll

do you think changing the spool valve would let the GM pump work with the Mll Rack?

I have read that that works.