Results 1 to 8 of 8
  1. #1
    Join Date
    May 2005
    Location
    Cardiff
    Posts
    1,743

    Steering column geometry??

    Does anyone know what kind of bends you can get away with with UJs in the steering column.
    Basically I have a corsa power steering column pointing more or less in the right direction at the top. Then a linkage with a UJ at each end. Then the shaft of the rack.
    There can be an offset (ie. a little bit of Z shape in the system) as a way of avoiding a front impact driving the column into the driver.
    The question is, is there a maximum angle recommended? Or is there any benefit in getting the column as straight as possible?
    So if that makes any sense I'd appreciate any thoughts!
    AKA Ed and not computer literate enough to change \'bitsilly\'.

    People say to me \'hey you, get out of my garden\'.

  2. #2
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214
    The main thing is to demonstrate that the setup will prevent the column moving more than 127mm in the event of a frontal impact at 30mph.

    This is usually achieved by having sufficient angle within the UJ's so that no/minimal linear force is applied to the column itself.
    (I seem to remember somewhere in my research that 15 deg minimum rings a bell but as I cannot find where I got it from then don't quote it!!)
    Also the incorporation of a collapsible/sliding and/or crushable section is advised.
    Exactly how you prove this is ok is the question?

    If it mimics the arrangement in a type approved vehicle or in the examiners view will pass then you should be OK!!!
    Have a nose at a few tin tops and check the angles etc..

    Maximum angle is probably dictated by the actual operating angle of the UJ in question. There will only be a certain throw on it, after which it will bind/lock/rub etc.

    Not exactly helpful sorry, and I do not proport to be a steering specialist, just someone who hopes he has got his right!!!!
    Dean.
    Lost. 1 portion of common sense! Somewhere between here and last week. If found please have it committed.
    If things are meant to be simple, then I wont do it! Hence why I have a Viper

  3. #3
    Join Date
    May 2005
    Location
    Cardiff
    Posts
    1,743
    Good points but it's not really the SVA issues it's more the optimisation of what I've got.
    I'm trying to decide if I should bash the manifold in a little and move a brake pipe for first possible path (most direct), or go around the pipe and so have to shorten the linkage and increase the angle of the bends. I think the UJs are fine in operation. Just trying to find out if it is worth aiming for the most direct route.
    The Corsa column is collapsible so no problem there.
    Thanks for the suggestions, watch this space!
    AKA Ed and not computer literate enough to change \'bitsilly\'.

    People say to me \'hey you, get out of my garden\'.

  4. #4
    Join Date
    Jan 2004
    Location
    New Forest. Hampshire
    Posts
    406
    As a pure 'opinion only' response,
    Unless you feel you are getting near to the point where the UJs start to bind because of the ecute angle, say over 30deg, then I would allow them to do what they are designed for and leave your lovely headers to do what they were designed for

    Cheers
    Robin
    AK427

  5. #5
    Join Date
    May 2005
    Location
    Cardiff
    Posts
    1,743
    Cheers Robyn but just this morning I decided on the straightest route. Luckily or unluckily my headers are old mild ones, second hand from Thunder road which did not fit very well anyway and so may even get replaced when the exhaust is made. Or if I can find that bendy stuff and some lagging.......
    It is beginning to get crowded in the engine bay but progress is being made!
    AKA Ed and not computer literate enough to change \'bitsilly\'.

    People say to me \'hey you, get out of my garden\'.

  6. #6
    Join Date
    Jan 2004
    Location
    New Forest. Hampshire
    Posts
    406
    Progress is Good
    Robin
    AK427

  7. #7
    Join Date
    Aug 2011
    Location
    East Sussex
    Age
    68
    Posts
    15,858
    I seem to recall reading somewhere that Steering Column U/J's (along with Propshaft U/J's and C/V Joints) should be used at an angle. If they are used "straight" they wear much quicker as they are using the same bearing surface all the time.
    Chris
    Ex AK427 351Cleveland T5WC

  8. #8
    Join Date
    May 2005
    Location
    Cardiff
    Posts
    1,743
    Yup I heard that from a different source too.
    Good news is it is all in and for the first time the steering wheel (albeit from a Corsa) turns the wheels It all fits and the corsa column has an excellent feel to it, which is good news cos if the power steering feels wrong I can switch it off and just use it for parking.
    Thanks God for power grinders, hammerite and welders. :P
    AKA Ed and not computer literate enough to change \'bitsilly\'.

    People say to me \'hey you, get out of my garden\'.

Similar Threads

  1. E30 BMW Steering \Column
    By Carl L in forum AK Technical Questions
    Replies: 10
    Last Post: 22-02-07, 08:15 PM
  2. Steering column
    By drimman in forum General Cobra Discussion
    Replies: 0
    Last Post: 11-07-05, 06:51 PM
  3. SD1 steering column
    By mark in forum General Cobra Discussion
    Replies: 3
    Last Post: 03-05-05, 09:33 PM
  4. Dax Steering column
    By Kevin Smith in forum DAX Technical Questions
    Replies: 5
    Last Post: 14-04-04, 01:54 PM
  5. Steering column for Gd
    By Kelvin in forum General Tech Tips & Questions
    Replies: 8
    Last Post: 06-12-02, 11:55 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •