Zeitronix ZT-2 Wideband setup

[Malibyte]

Hi all -

I bought one of these (full kit) from 935 several months ago. Because of lack of time and motivation, I haven't gotten around to installing it. Now I'm figuring that it's time for me to get off my ass and start getting the car ready for Vegas within the next couple of months. Not to mention that the car's been running rich...need to get it tuned up - not just for the dyno, but also for the smog test in October.

The instructions (which are not incredibly intuitive) recommend that the sensor be in the downpipe, at least 16" behind the turbo....they also say that it needs to be mounted so that the sensor points upward, somewhere between the 10:00 and 2:00 positions.

Now...my downpipe runs nearly completely vertical from the elbow to just before the cat. There is NO WAY that I could mount it in the DP and have it point upward. My current oxygen sensor is, of course, in the elbow just behind the turbo. How much of a problem would it be if I used the stock location for the wideband?

Also, I got the EGT, boost-sensor and display with it. It didn't come with any tubing for the boost sensor. Can I simply buy some and "T" into my current boost-gauge line?

Any other "gotchas" that I need to know about?

TIA - Bob

[935motorsports]

Many run the sensor in the stock port. ZT has a "narrowband" out put that will simulate the stock o2 sensor to keep the o2 sensor happy.

Running in the stock port will shorten the life of the sensor somewhat, but they are less then $75 each, not terribly expensive if it only lasted a year or 2.

If you are concerned about lifespan, you could run a spacer to put the o2 sensor higher off the pipe and away from the heat.

I did get you the adapter flange right?

Any questions about setup, give me a call.

[Dangerous Ken]

I spent around $100 for an insulated bung.
What good is having wideband if the readings are 'out of range' and you're burning up your sensor...

http://www.innovatemotorsports.com/xcart/customer/product.php?productid=16148&cat=250&page=2

Ken

[935motorsports]

That bung would be nice and it would still work with the adapter flange that I provided.

[Malibyte]

I spent around $100 for an insulated bung.
What good is having wideband if the readings are 'out of range' and you're burning up your sensor...

http://www.innovatemotorsports.com/xcart/customer/product.php?productid=16148&cat=250&page=2

Ken

Ken: So that bung screws into the existing flange and the sensor goes in the other end. Wouldn't that cause the EGT readings (and perhaps the oxygen readings) to be off a bit?

If not, and that particular bung fits in the stock flange (I don't have easy access to a welder or welding tools), then that looks like the ticket.

Thanks - Bob

[BillyM]

I wouldn't trust any EGT readings off the ass-end of an o2 sensor anyways...

...as for distance changing the o2 reading, not at all.

--BillyM

[Dangerous Ken]

The instructions (which are not incredibly intuitive) recommend that the sensor be in the downpipe, at least 16" behind the turbo....they also say that it needs to be mounted so that the sensor points upward, somewhere between the 10:00 and 2:00 positions.


10 and 2 are recommended so condensation doesn't kill the sensor. 6 oclock is the worst position.

16"+ behind the turbo is recommended to get away from the heat there...
The fabricators of downpipes couldn't have picked a worse place to put sensor mounts. Sure it is easy to get to at the loss of increased turbulence where the airflow curves And is close to the turbo.

The heatsink bung extender is an effort to keep the sensor under 900 degrees. No, it won't be in the airstream, but it will keep the sensor in it's operating temperature range. Think of it like a computer processor heatsink - the sensor just quits if it gets too hot.

It just screws into the existing wideband bung. The link provided is for the standard bosch heated sensor size. As an alternative, you could fab a 4" square copper 14ga sheet with a hole in it to act as a heatsink, but that only works where there's cool airflow, like on an exhaust pipe on the bottom of the car.

Ken

[Moorman]

Just as an FYI, mine is not mounted between 10 & 2...rather it's tipped up a little from horizontal.

[Malibyte]

Just as an FYI, mine is not mounted between 10 & 2...rather it's tipped up a little from horizontal.


Jason:

I take it that you left the stock narrowband in as well? Where did you mount the wideband? I'm still going back and forth as to whether to use both or just use the wideband only, as apparently it will feed the ECU so no codes are thrown. Also, do you have the display unit, and if you do, where did you put it?

Also, all of you guys - I downloaded an install diagram for the 89+ ECUs from a guy on Supramania. I'm wondering if you guys used the same instructions, and if not, where did you get yours?

Billy: It comes with a separate EGT probe. Found it after I went through the whole kit. :duh:

[Moorman]

Yeah, I left the stock O2 in place and I put my WB near the bottom of the downpipe....no display unit, just the laptop. I don't remember what diagram I used because I did the S-AFC2 at the same time, but I *think* it was the same one. SM is down at the moment, so I can't verify that.