Wideband O2 sensor placement

[Jonas_R]

Yeah think Slow2 is running the Zeitronix system.

Anyhow Zeitronix states the following their instructions http://www.zeitronix.com/installatio...structions.pdf

The Wideband Oxygen sensor must be positioned after the turbocharger and before the catalytic converter. Recommended installation
requires welding the O2 sensor bung in the down pipe at least 16” away from the turbo. A stock narrowband O2 sensor location is
usually too hot for the wideband O2 sensor. The oxygen sensor must be positioned vertically (wires pointing upwards between 10 and 2
o’clock) to prevent cracking of the sensor ceramic element and protect sensor against water condensation.

[Nj]

cheers for the education Paul. I had no idea there was so much to lambda sensors. It still remains up there with brain surgery and understanding women's emotions for me though

[S2central.net]

Good that is consistent with the TechEdge install for same Bosch LSU WBO2 device...

Seems like a bung further along the downpipe is required for this... probably a fairly flat section before the CATs.

Means that the factory sensor can be retained no sweat and then have the option to use the emulated output from Zeitronix if so desired.

[A80Avant]

can you splice and lengthen the wideband cables to be able to fit it so far away from the ECU?

[Jonas_R]

I'm running my Zeitronix wideband sensor near the gearbox and there is more then enough cable. So with the Zeitronix I would say that this is not an issue.

[A80Avant]

does anyone know the LSU bosch sensor though? cause i will be getting that one with VEMS

[Jamo]

Does explain why on the OEM later cars and some of the 034 downpipes the 2nd sensor boss is located at the bottom of the downpipe just infront of the cat.

[S2central.net]

Enlightenment happens then.......

[Rocco]

OK i am going understund all

we have to need an other diferent hole for mount in the rear side of our donwpipes a "wideband 02 sensor"

it will provide at real time if our aire/fuel ratio at WOT its poor,decent,good or very rich
imagine that one day we had one injector fail...working with only the half of the fuel that the ECu send... it will be very dangerous and we will broke our engine very fast¡¡


what do you think friends about make a group buy with this???

[EspenW]

Erm, just did a quick search, 80GBP, surely not?

Check US Ebay, as it retails for approx. £56 in the US.
It is however, way overpriced.

[EspenW]

Thats on Zeitronix - works well... Also is controllable if you want to skew the narrowband reading into the ECU so that it modulates around a slightly leaner or richer AFR if you wish... WIth care you could run slightly lean at cruise all the time and save buckets of fuel... I mean slightly lean - like running at 14.8 or 14.9 instead of 14.7 - thats unlikely to cause any nasty effects on the engine but would result in saved fuel. At WOT this signal gets ignored of course and so we want nice richness for good power. I *really* like the Zeitronix setup because of this potential - it could pay for itself rather quickly - in theory anyway.

On the Golf, I run the WB instead of a NB. I do this to get programmable AFR at WOT.
The Innovate LC-1 has two analog outputs that can feed a ECU and an analog gauge or in my case, provide two, switchable inputs to the ECU. I use the XD-1 digital gauge that is fed by the digital output from the LC-1.
I can program the LC-1 to output the "14.7:1 signal" at any target AFR. The ECU doesn't know any better and will try to maintain any AFR that generates this signal.
I program analog output 1 to give 15.3 for lowest BSFC at cruise (no CAT) and program output 2 to 12.6:1 for max power.
The WOT switch on the throttle body controls a relay that switches between the two analog outputs that go into the ECU.
Being able to do this on a 23 year old car with K-Jet Lambda is pretty cool. In addition, it enables me to run correct AFR on any mixture of ethanol and petrol as the system is in closed loop at all times.

[EspenW]

OK i am going understund all

we have to need an other diferent hole for mount in the rear side of our donwpipes a "wideband 02 sensor"

it will provide at real time if our aire/fuel ratio at WOT its poor,decent,good or very rich
imagine that one day we had one injector fail...working with only the half of the fuel that the ECu send... it will be very dangerous and we will broke our engine very fast¡¡

Absolutely. In my opinion, a WB is mandatory equipment for any car that is tuned beyond a simple remap.

[S2central.net]

On the Golf, I run the WB instead of a NB. I do this to get programmable AFR at WOT.
The Innovate LC-1 has two analog outputs that can feed a ECU and an analog gauge or in my case, provide two, switchable inputs to the ECU. I use the XD-1 digital gauge that is fed by the digital output from the LC-1.
I can program the LC-1 to output the "14.7:1 signal" at any target AFR. The ECU doesn't know any better and will try to maintain any AFR that generates this signal.
I program analog output 1 to give 15.3 for lowest BSFC at cruise (no CAT) and program output 2 to 12.6:1 for max power.
The WOT switch on the throttle body controls a relay that switches between the two analog outputs that go into the ECU.
Being able to do this on a 23 year old car with K-Jet Lambda is pretty cool. In addition, it enables me to run correct AFR on any mixture of ethanol and petrol as the system is in closed loop at all times.

Espen - thats a nifty trick for K-Jet with Lambda - brilliant idea... Like your style !

[EspenW]

Espen - thats a nifty trick for K-Jet with Lambda - brilliant idea... Like your style !

It works very well. It was Klaus at Innovate Motorsports that came up with the idea. Clever chap

[diesel des]

Paul the tech edge setup i have allows you to run the stock ecu of a simulated narrow band output. I dont use that but you can then set lambda 1 to be 10-30:1 ....