Can anyone explain the difference between the two? Also, I know they can be used for tuning, but can they be installed permanantely? Will the PFC have the ability to read such acute measurements or is it a waste of money? I've also seen alot on this "Datalogit" what does this do?

 

a lambda/wideband O2 sensor tip only last about the 600 hours.

 

UEGO is the type of wideband O2 sensor you can use.
LM-11 is another type.

The have different materials or methods of temperature compensation when measuring A/F ratio.

Depends on "permanent" since most wideband sensors only have a life of a few hundred hours. These sensors can cost around $300 to replace.

The narrow band sensors (typcical stock sensors) last longer, but the accuracy and temperature variance is too much for accurate tuning.

I'm not familiar with PFC stuff, but I would imagine that the Datalogit is some sort of data logging function. You can basically datalog a run and read it later to see temperature, A/F mixture, rpm, injection time status.

J

 

UEGO (made by NTK Japan) is a true wideband sensor. The LSM-11 is standard type sensor with a slightly more sloped transition curve. The LSM-11 can directly replace the stock sensor but does not have the precision of an UEGO sensor. The UEGO requires extra electronics since it must be heated and driven with a constant voltage (the current is the output signal). UEGO sensors lasts long if they are heated correctly. Honda made some lean-burn Civics using this sensor. Those cars easily go 15000 miles without replacing the sensor.
-MP

 

You can pick up one of these UEGO sensors from Napa for around $140.
This
project requires a 2 cell wide band O2 sensor that was used on a lean burn
Honda Civic. It is available from Honda dealers, and from www.hparts.com.

Application/part number:
92-95
Honda Civic
1.5 VTEC
36531-P07-003

The generic NAPA equivalent may be cheaper, but may not be widely available:
Part number OS791
http://www.napaonline.com/cgi-bin/nc...9&prmenbr=5806

 

And this will work in an FD? The thread size and diameter of the sensor matches up? My other question is, can the ECU detect the finer measurements? I mean, for instance (this is just for examples sake) that the UEGO sends a signal in .0001 increments and the ECU can only detect .01, so if the UEGO sent .0223, the stock ECU would just read .02, does anyone understand what I'm trying to say. I'm I totally off in my thnking here?

 

The ECU only uses the O2 sensor during closed loop mode in order to increase your fuel mileage by adjusting the ECUs fuel maps. To do this the ECU doesn't need a wideband sensor. A standard sensor will work just fine. Unless you are tuning the car, a wideband sensor would be a waste of money.

 

So what you are saying is that you can plug in the lean burn civic sensor and use it to tune? (it's output will be more linear than the stock O2) I know that a true wide band will be better but does this sensor offer increased accuarcy over the stock one and allow you to use a standard A/f Gauge?

 

The ECU will NOT work with an UEGO sensor. You will need additional electronics to generate a signal that the ECU can understand. The DIY project mentioned above does not provide an output for the ECU, but I'm making my own circuit which has this. This will allow a drop-in replacement which will work with the ECU and at the same time give a more precise read-out of the A/F ratio.
-Mike P.

 

That sounds really good. How long till you have a working setup? I'm sure you could sell it to a lot of people not just rx-7 guys

 

Mike:
All it should take is a thresholder at 2.5volts to make it look like a normal o2, to the ecu.
Is that what youu plan to do?

-Les

 

You need to also invert the signal.

You can make your own monitor/output to work with a Civic VX wideband o2 sensor.

A friend and I are making our own, as well his brother is working on inverting the signal, and getting an output that will work with an aftermarket A/F gauge, ie so you can read when you get lean for a rough guide.

thesaint

 

Does anyone sell a UEGO system thatr will work with FD's? I thought I say something in sport compact car magazine? Have to check my archives.

 

Lesd/the saint: You're right, all it takes is a 2.5V inverting comparator with an output signal of 0-1V. I have all the pieces together, but I am yet to complete the wiring and installation in the car. The control box will be installed under the hood complete with connectors to the stock harness, so there is no tinkering with existing wiring. The read-out will be installed in the DIN plate I have over the radio. Still thinking of modifying a 52mm Greddy gauge myself for the read-out, but to start with it will just be a 7-segment display.
I don't think any UEGO system is currently available as a drop-in for any car.
-Mike P.

 

I would be interested to know how the car runs once installed and see pics of the installation. Maybe you could post a "How-to" on a website or sell a conversion kit. I bet alot of people would buy it, I would.