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Switching multi-wire wideband O2 sensors between single gauge

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steveg

steveg

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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?
 
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.

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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?
 
I just use a simple three position electrical metal toggle switch. I didn't feel the need for relays. Left, Right, and off.
 
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)
 
RAC68 said:
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)
Click to expand...

I'm wanting to do this because my engine is modified and I want to see degree of richness at various rpm/load ranges.
 
steveg said:
The wideband O2 sensors have 6 wires each to switch between if you have two of them with one gauge.
Click to expand...
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.

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