oadamo
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| posted on 5/1/08 at 03:05 PM |
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power steering to non power steering
is it possible to convert a power steering rack to non power steering.
adam
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rusty nuts
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| posted on 5/1/08 at 03:15 PM |
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It is possible to fit a manual rack if one is made for your type of car/donor. It may also be possible to fit another type of rack?
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smart51
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| posted on 5/1/08 at 03:18 PM |
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Probably not. A non power steering rack is a big round bar with a rack cut into it, in a sleeve. It has a big pinion moving it which is rated to
take quite a high steering torque.
A power steering rack is a big round bar with 1 piston machined in the centre. it is fitted to a big piston and so forms 2 hydraulic rams. Fluid is
pumped out of one and into the other to provide most of the steering. The pinion takes much less steering load.
Whilst it is probably possible to connect the two hydraulic rams together, to equalise air pressure with the fluid drained, the rack can do much less
work than before. It would probably work but would it last?
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blakep82
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| posted on 5/1/08 at 03:24 PM |
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an trick on old BMWs was to just remove the belt driving the power steering pump, and of course leave oil in the rack.
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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oadamo
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| posted on 5/1/08 at 03:30 PM |
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the racks on my saxo but its an electronic one with no belts. because iam trying to make it as light as possible. bu ti cant find a rack of a saxo
thats not power steering. i think i might have to cut and shut another rack.
adam
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RazMan
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| posted on 5/1/08 at 03:31 PM |
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quote:
Originally posted by blakep82
an trick on old BMWs was to just remove the belt driving the power steering pump, and of course leave oil in the rack.
Doesn't that make the steering overly heavy? I've driven a 525 with a knackered steering pump and it was murder around town.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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oadamo
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| posted on 5/1/08 at 03:31 PM |
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yes raz its very very  heavy when i disconnect the pump.
adam
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rusty nuts
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| posted on 5/1/08 at 03:51 PM |
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A lot of Peugeot 106 parts are compatable with the Saxos
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Guinness
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| posted on 5/1/08 at 03:56 PM |
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I was going to say that Rusty!
I have a 106 with the cast iron 1.6 litre engine in it, 185 tyres and a manual rack!
Might be worth a look in the scrappers / ebay.
Cheers
Mike
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blakep82
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| posted on 5/1/08 at 04:01 PM |
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quote:
Originally posted by RazMan
quote:
Originally posted by blakep82
an trick on old BMWs was to just remove the belt driving the power steering pump, and of course leave oil in the rack.
Doesn't that make the steering overly heavy? I've driven a 525 with a knackered steering pump and it was murder around town.
probably  but it stops it being PAS
electric ones though, i doubt it...
[Edited on 5/1/08 by blakep82]
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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charlierevell
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| posted on 5/1/08 at 05:57 PM |
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I just took the pump and asociated bits off my old 205... kind of a quick rack without the costs.
Not the easiest to park but other than that it was ok!
Tango orange is an 'IN' colour!!
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meany
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| posted on 5/1/08 at 06:02 PM |
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what about a citroen Ax rack?
just a thought..are they similar?
http://cgi.ebay.co.uk/Citroen-AX-Manual-Steering-Rack_W0QQitemZ300179036078QQihZ020QQcategoryZ21654QQrdZ1QQssPageNameZWD1VQQcmdZViewItem?_trksid=p1638
.m118
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britishtrident
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| posted on 5/1/08 at 07:14 PM |
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Hydraulic Power steering racks operate the valve mechansism by some form of lost motion device. These days is is usually a quill shaf on the
steering input pinnion. This is why power steering systems have excess free play at the steering wheel with the engine stopped, the free
play disapears when the hydrualic pump is running.
Disconnecting the pipe work on a power steering system to convert to manual steering is a UK MOT failure.
The internals of a power steering rack are not engineered for continuous manual use.
[Edited on 5/1/08 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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smart51
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| posted on 5/1/08 at 08:04 PM |
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I had 2 saxos and they were both manual steering. Get a saxo manual rack.
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Jesus-Ninja
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| posted on 6/1/08 at 11:29 AM |
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I tried this when stripping the Nissan. Ludicrously heavy maneouvering, and I thought "well, once I'm at speed, things will lighten up,
right?"
No. Needless to say the belt went straight back on!
PAS system also lost it's fluid on the way to a conference where the car was being displayed recently
Nearly ended up in the armco coming down a tight slip road, I simply couldn't get the wheel round quick enough. The load on my arms was
incredibly, so I can't imagine the steering column etc would last long, especially if the car is used, ummm, "assertively"
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locost_bryan
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| posted on 8/1/08 at 10:26 PM |
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Not having looked inside a power rack, would it be practical to have something machined to replace the "quill" to give a proper mechanical
connection between the input shaft and the pinion?
Having had an engine failure, the sudden loss of power steer and brake booster approaching a tight corner was most alarming Fortunately, the
resulting adrenalin boost came in handing 
Bryan Miller
Auckland NZ
Bruce McLaren - "Where's my F1 car?"
John Cooper - "In that rack of tubes, son"
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NS Dev
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| posted on 9/1/08 at 01:53 PM |
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argghh!!
Britishtrident's comments are right, and no its a pig of a job.
In the dim and distant past when sierra quickracks were very hard to come by, I tried to use a sierra pas rack as manual as they are 2.8 turn as
std.
no good, quill shaft has lost motion as britishtrident says and its no good.
Is saxo power rack not power column?
Anyway, can you not use the std electric pump? Whatever, they certainly made them with manual racks as well.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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NS Dev
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| posted on 9/1/08 at 01:54 PM |
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surely you can't fit the saxo rack on your rwd saxo anyway?
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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C10CoryM
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| posted on 9/1/08 at 05:19 PM |
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Have a look here.
http://auto.howstuffworks.com/steering2.htm
Couple problems that typically make a conversion not worth while.... First, the seal (piston in the picture) needs to be removed so that you dont
fight hydraulics. This is no big deal really, but on some racks it is not viable. The second has already been mentioned. Inside the valve there is
a small torsion bar which connects the steering shaft to the steering pinion. This is mostly just for emergency back up use, and to provide some
steering feel etc. It is not designed for constant use and if you ever have a look at how small they are I doubt you would want to use it in a manual
rack
There are a few racks that you can buy manual conversions for (RX7), but Id sooner get a custom rack with the ratio I wanted at that point.
Cheers.
"Our watchword evermore shall be: The Maple Leaf Forever!"
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