Results 1 to 12 of 12

Thread: Switching multi-wire wideband O2 sensors between single gauge

Forum to discuss Austin Healey Sports Cars

  1. #1
    Darth Vader steveg's Avatar
    Join Date
    Sep 2007
    Location
    Altadena, CA
    Posts
    2,638
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    8
    Thanked in
    8 Posts

    Switching multi-wire wideband O2 sensors between single gauge

    I'm contemplating getting a better air/fuel meter than the single wire K&N I currently use. However I don't want to buy two gauges.

    Wondering if there are any micro-relay banks one can buy that can switch 6 wires each from 2 sensors to a single gauge.

    Has anyone ever heard of such a device?
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow

  2. #2
    Freshman Member
    Join Date
    Jun 2017
    Location
    Canberra, Australia
    Posts
    9
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Steve,

    These may meet your needs. I have a friend who has the one gauge with two AFR sensors and you simply touch the gauge and switch between the two.

    http://www.plxdevices.com/ProductDetails.asp?ProductCode=897346002719


    http://www.plxdevices.com/Automotive...sors-s/108.htm

    Hope this helps,

    Cheers
    Tony

  3. #3
    Yoda Randy Forbes's Avatar
    Join Date
    Feb 2003
    Location
    SW Florida (Sarasota/Bradenton area)
    Posts
    4,289
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    I've had only a little bit of exposure to the PLX devices, and at least as far as an OBD-II car is concerned, they'll tell you more than you ever wanted to know__of course they are programmable to tell you ONLY what you want to know too!

    I actually had bought a duplicate system to install in one of my own cars, but alas, they're still in their boxes on the shelf.









    http://www.britishcarforum.com/bcf/image.php
    57 Healey BN6L-942 Wine Red/Honey Tan
    99 BMW M Rdstr Cosmos Black Eurosport Twinscrew Supercharger
    01 BMW M Rdstr Steel Gray Performance Center (factory) Delivery
    11 X5 35i Sport Deep Sea Blue Metallic Wife's Turbo Hauler

  4. #4
    Obi Wan Patrick67BJ8's Avatar
    Join Date
    May 2007
    Location
    Holly Lake Ranch, (East) Texas
    Posts
    2,157
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Is there a portable one available with A probe that can be inserted into each of my two BJ8 exhaust pipes for a readout and without breaking the bank and reliable?
    Patrick
    '67 Metallic Golden Beige/Red
    Owned since '72

  5. #5
    Yoda
    Join Date
    Feb 2007
    Location
    California USA
    Posts
    3,204
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    4
    Thanked in
    4 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    There's the Gunson analyzer, but I don't know how accurate or 'reliable' it is. The first time I used it, the vinyl tube melted:

    http://www.ebay.com/itm/like/2222585...=ps&dispItem=1

  6. #6
    Jedi Hopeful Hangtown Healey's Avatar
    Join Date
    Sep 2003
    Location
    California
    Posts
    176
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    I just use a simple three position electrical metal toggle switch. I didn't feel the need for relays. Left, Right, and off.
    This Jedi stuff is not really cute. I recommend the administrator get rid of it.

  7. #7
    Luke Skywalker RAC68's Avatar
    Join Date
    May 2010
    Location
    NJ Shore
    Posts
    1,573
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    2
    Thanked in
    2 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Hi All,

    Boy, am I feeling out of place in this discussion. One question. I appreciate using these gauges to set up your SUs could help improve performance. However, since the engine and carburation is "old school" and performance improvements are limited by the car's setup in time, WHY go so far?

    Please don't misunderstand. I do appreciate having the desire to improve our cars...but when does adding and upgrading change the Healey to something else?

    Just thoughts,
    Ray(64BJ8P1)

  8. #8
    Darth Vader steveg's Avatar
    Join Date
    Sep 2007
    Location
    Altadena, CA
    Posts
    2,638
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    8
    Thanked in
    8 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Quote Originally Posted by Hangtown Healey View Post
    I just use a simple three position electrical metal toggle switch. I didn't feel the need for relays. Left, Right, and off.
    The wideband O2 sensors have 6 wires each to switch between if you have two of them with one gauge.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow

  9. #9
    Darth Vader steveg's Avatar
    Join Date
    Sep 2007
    Location
    Altadena, CA
    Posts
    2,638
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    8
    Thanked in
    8 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Quote Originally Posted by RAC68 View Post
    Hi All,

    Boy, am I feeling out of place in this discussion. One question. I appreciate using these gauges to set up your SUs could help improve performance. However, since the engine and carburation is "old school" and performance improvements are limited by the car's setup in time, WHY go so far?

    Please don't misunderstand. I do appreciate having the desire to improve our cars...but when does adding and upgrading change the Healey to something else?

    Just thoughts,
    Ray(64BJ8P1)
    I'm wanting to do this because my engine is modified and I want to see degree of richness at various rpm/load ranges.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow

  10. #10
    Yoda Randy Forbes's Avatar
    Join Date
    Feb 2003
    Location
    SW Florida (Sarasota/Bradenton area)
    Posts
    4,289
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Quote Originally Posted by steveg View Post
    The wideband O2 sensors have 6 wires each to switch between if you have two of them with one gauge.
    You shouldn't run the engine without the O2's heater circuit energized, those wires need to stay hot in Run & Start mode, so that takes switching them out of the equation. Really, you'd only need to switch the signal return wires, but...

    I'd always found that being able to see both banks simultaneously to be worth the effort. I'm sure there must be a dual-reading display available that will accept both signals.

    This was an old narrow-band display, reading both banks of a 3.8 Buick V6 in an MGBGT I used to have.

    http://www.britishcarforum.com/bcf/image.php
    57 Healey BN6L-942 Wine Red/Honey Tan
    99 BMW M Rdstr Cosmos Black Eurosport Twinscrew Supercharger
    01 BMW M Rdstr Steel Gray Performance Center (factory) Delivery
    11 X5 35i Sport Deep Sea Blue Metallic Wife's Turbo Hauler

  11. #11
    Jedi Hopeful Hangtown Healey's Avatar
    Join Date
    Sep 2003
    Location
    California
    Posts
    176
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Switching multi-wire wideband O2 sensors between single gauge

    OK, so my sensors/display is not wide band, but narrow band. I think I am getting enough information to work with custom needles. What more can wide band give me?
    This Jedi stuff is not really cute. I recommend the administrator get rid of it.

  12. #12
    Jedi Trainee red57's Avatar
    Join Date
    Apr 2008
    Location
    Washington, USA
    Posts
    376
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Re: Switching multi-wire wideband O2 sensors between single gauge

    Hangtown Healey - Just google "why wideband o2 sensor" and you will get lots of good reading material that explains the difference.
    Dave

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
  •