JoelP
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| posted on 26/2/05 at 08:52 PM |
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can a PS rack be used as a quick rack?
anyone know if this would work? we need quicker racks, and powersteering racks work without the fluid. SVA man might not like it but would it work?
its just i have a few knocking about 
is the shortening process similar for an assisted rack and a normal rack?
cheers.
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Wadders
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| posted on 26/2/05 at 09:03 PM |
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You'll be drinking Pina Coladas before long 
its just i have a few knocking about
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Chris_R
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| posted on 26/2/05 at 09:53 PM |
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Thought that if it doesn't do what it's supposed to do you'd fail an MOT, SVA may be the same. You might be onto a winner if
it's not gonna reach the road or race league though.
A bit of slapstick never hurt anyone.
http://www.chris.renney.dsl.pipex.com/
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MikeRJ
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| posted on 26/2/05 at 11:46 PM |
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I'm sure this was disccused very recently, and the concencus was that it's wasn't a great idea for various reasons.
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JoelP
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| posted on 26/2/05 at 11:58 PM |
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i must've missed the thread surely impossible! 
any chance of a link to it?
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monkey69
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| posted on 27/2/05 at 12:18 AM |
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On the subject of powered steering, how about this type of set up:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=43120&item=7955999350&rd=1
I presume you fit the quickest rack possible, and have this type of electrically powered column driving it. No fluids required, so can go in with
pretty much any engine?
Could this work on a seven? It may get in the way of pedals.
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MikeRJ
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| posted on 27/2/05 at 10:30 AM |
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quote:
Originally posted by JoelP
i must've missed the thread surely impossible!
any chance of a link to it?
http://www.locostbuilders.co.uk/viewthread.php?tid=20786
http://www.locostbuilders.co.uk/viewthread.php?tid=21171
http://www.locostbuilders.co.uk/viewthread.php?tid=21861
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MikeRJ
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| posted on 27/2/05 at 10:36 AM |
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quote:
Originally posted by monkey69
On the subject of powered steering, how about this type of set up:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=43120&item=7955999350&rd=1
I presume you fit the quickest rack possible, and have this type of electrically powered column driving it. No fluids required, so can go in with
pretty much any engine?
Could this work on a seven? It may get in the way of pedals.
An "expert" on the PistonHeads kitcar forum insisted that it would be totaly unsuitable because of the torque they exert on the column
mountings, and that manufacturers had problems with dashboard deforming etc.
My view is that it's perfectly feasable providing you understand the kind of forces you are dealing with. On a locost we have a substantial
tubular frame that can be adapted to take those forces, not a thin pressed steel panel.
Whether power steering on a locost is a good plan is another matter. Ditching e.g. a Pinto for something lighter and more modern would go a long way
to lighter steering without the potential downsides of reduced feel/feedback from PS.
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JoelP
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| posted on 27/2/05 at 11:02 AM |
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bloody hell how did i miss all those links! my internet was off over christmas.
ah well, that throws up some spanners...
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locost_bryan
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| posted on 28/2/05 at 08:32 PM |
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iirc the pinion on a powered rack is in two pieces, with a torque sensing thing connecting them, and the torque sensing thing controls the fluid
transfer and pressure.
The fluid needs to be retained in the rack for lubrication, but the plumbing can be replaced with a bypass pipe.
The original pinion could be replaced with a solid pinion (perhaps from a manual rack, if one exists), or the two parts welded together - I presume
this would require an engineer to certify for SVA.
Keith has done this, and promised to put a how-to on his site - hasn't appeared yet 
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 1/3/05 at 08:21 AM |
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I think you have seen the spanners in the works that I mentioned on this one before, but I have tried exactly what you want to do, previously on a
rally car. The rack will shorten etc just the same as th manual one, but the pinion shaft has a torque sensing element in it which twists a bit to
operate the fluid valve. I would be a bit hesitant to use the power rack with that extra flex making the steering more vague, when a quickrack kit is
only £45 or so.
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