Results 1 to 7 of 7

Thread: Help! Electronic Speedo

  1. #1
    User
    Join Date
    Jul 2009
    Location
    Birmingham
    Posts
    299
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Help! Electronic Speedo

    Hi All,

    As part of my conversion, I will have an electronic speedo. The loom is a cut down version on a Zafira B loom (CANBUS). The speedo is driven from the ABS sensors on the car. I have left that wiring on the loom and I need the ABS ECU to avoid issues with the engine running and the speedo.

    So I either need a set of Corsa B hubs or do a modification to my drive shafts / hubs to fit a sensor and get a signal.

    Info is a little sketchy on pulse outputs and if a Corsa one would work so I am hoping someone could help. Would I be able to use outer Corsa B CV's with the metal ring and mount a sensor? Do the Corsa B CV's fit normal 22 spline driveshafts? (I think 1.6 ones do but not smaller engine sizes)

    Is that a sensible route or does anyone have anything they have done before? I am thinking it would be good for when I can afford custom dash and ECU etc.

  2. #2
    Senior User Iain's Avatar
    Join Date
    Sep 2004
    Location
    East Midlands
    Posts
    13,542
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    I'm running an ABS sensor on one wheel to feed EPAS inputs. It's a Nova knuckle, with a modified bracket (Cavalier mk3 maybe?) bolted through a heatshield hole.

    The ABS rings are removable and pressed on so can be tuned to your requirement - however I only have experience of big block stuff. The outer CVs I thought were the same between 22 spline and normal Nova shafts?

    The ABS sensor feeds an orange box (looks like a relay) which outputs the required signal for use. That's pretty easy to wire in.

  3. #3
    Senior User Iain's Avatar
    Join Date
    Sep 2004
    Location
    East Midlands
    Posts
    13,542
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    More details of how I did it here: https://www.pngclub.com/forum/showth...=1#post2308247

  4. #4
    User
    Join Date
    Jul 2009
    Location
    Birmingham
    Posts
    299
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Hi Iain,

    I just read that page. I must have missed that when I read your build thread. So ABS sensor rings do these come off the corsa b outer CV? I have seen a few corsa B CV joints with these on?

    And the abs sensor corsa b also?

  5. #5
    Senior User Iain's Avatar
    Join Date
    Sep 2004
    Location
    East Midlands
    Posts
    13,542
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    I was given the ABS sensor/orange box/bracket so don't know for sure, I suspect it was off a big block 90s Vauxhall but wouldn't surprise me if they're all the same. I had a bunch of big block CVs in stock too so just picked the teeth (29??) that I required.

    Can't comment on small block Corsa stuff sorry, however I was reading this page the other day for wiring Corsa C EPAS which goes into quite a lot of detail on Corsa ABS: http://www.super7thheaven.co.uk/cors...steering-epas/

    Looks like they used a speedo corrector rather than tuning it on the CV teeth.

  6. #6
    User
    Join Date
    Jul 2009
    Location
    Birmingham
    Posts
    299
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Hi Iain,

    I found that website too, its full of useful information. I have found out a little more. As I am going to use a cut down Zafira loom, they use a active wheel speed sensor with multipole ring inside the hub bearing. As I won't be able to use those hubs, I am going to have to use a hall sensor with multi tooth ring, as you did, and hope I can generate a signal and that the ABS module can decipher. Its going to be a bit testing and a bit hit and miss but if I can find the right mix of parts, it should work.

    The other option is to dimension the wheel bearings and see if I can find a bearing that has the multipole ring and sensor within it. But I need a few more dims and some further research first.

    My blinking CANBUS loom was always going to be something to cause issues. However my old Nova loom is so bad its a case of build another one or make something out of what I have got. As I dont have a lot of cash its going to be build it. Also if I can get it sorted and the loom cut down, then at least I can have sort out a guide for the group. Most probably will just use a gremlin loom, but I had the whole zafira b to break so got all the bits.

  7. #7
    Senior User Iain's Avatar
    Join Date
    Sep 2004
    Location
    East Midlands
    Posts
    13,542
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Fun project! Another option is Corsa B 1.8 SRi rear disc conversion which have ABS sensor wires coming out of them. I'd have used this if I hadn't cut them off on installation like a muppet.

Posting Permissions

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