ok so i just orderd one of these Zt-2 af meters and i have a few questions before it shows up in the mail. I was planning on having another hole drilled in my down pipe and a new bung welded in for the extra WB o2 sensor to reside in. Is this the best place to put this sensor, or should i place it elsewhere? Also - is this necessary or can i somehow hook it up to work for my stock o2 AND my wide band gauge???? Ive had a/f monitors narrow band before but this stuff is all new to me thanks!!



Zt-2 the most affordable Wideband Air/Fuel Ratio Meter
Only $279 including the Wideband Oxygen Sensor!

 

Bosch Wideband O2 sensor
Linear Wideband Output AFR=Vx2+9.6
Nonlinear Wideband Output
Serial data output to the Zeitronix Wideband LCD Display
Serial data output for real time datalogging (PC laptop required)
RPM Input ( tachometer or primary side ignition coil input).
The RPM input works in any car and any ignition system. No additional adapters needed!
Simulated Narrowband Output to feed a stock ECU
Throttle Position Input
Boost Sensor Input
EGT Probe Input
User Input/Warning Output

i guess maybe i answered my own question just want to verify...

 

You should have a second o2 sensor. Sounds redundant, but it's needed, as they serve differente purposes

As for the location? I have heard the downpipe is the best place.

-poz

 

Dan, here is a write up that Tom M'Guiness did that has pics of where you want to install the o2 bung. Also has the wiring you need. The turbo down pipe gets too hot and is too close to the turbo.

Tom's write up

 

says that the WB o2 has a narrow band output for the car to run from... should i not use that?

 

awsome write up! Getting another bung welded in is no problem, just thought if they made it so you could use the stock hole to install that would work easier.

 

The issue is that the wb02 sensor is more sensitive to heat then the narrow band. The stock location gets too hot.

 

You cannot EVER put the wideband between head and turbocharger.
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Kevin, thanks for sharing Tom's instructions. It does help those of us who are visually challenged should we take on this endeavor.

 

OK thanks ST- i'll get up to TriState Muffler once the parts come in and have them weld a bung in before the cat somewhere...They build street rods and race cars awsome custom exhaust work!!!

 

why would it be bad to have the sensor located on the side/bottom of the exhaust pipe?? I dont see why it would make much of a difference.

 

Condensation sits in the bottom and is hard on the sensor.

 

It may be that way a bit slow to react, if you run closed loop. Othervise it's a very good piece of equipment.

 

soo... It wouldnt matter where the sensor was if you put it where the downpipe is going down say on the side by the starter right?? Reason is, I am about to install one.

 

in that writeup posted above, they mount the O2 sensor just before the cat.... Im thinking of mounting mine as close to the dp as possible but on that pipe. IIRC the DP is double walled anyway and would be a PITA mount correct.