has anybody taken out the stock pre cat 02 sensor and fitted a wideband and controller with 0-1 volt narrowband output for the stock ECU???
like this one,
http://www.boostcontroller.com/index.php?item=263
would love to have a wideband with logging so I can fine tune my MTH file.

 

that sounds interesting... i wonder the same...

 

is this something like the apexi S-AFC?

 

No, this just tells you the air fuel ratio so you can tune your ecu... S-AFC is for tuning the a/f ratio...

 

I've done it in other cars, and have an AEM wideband left over from a previous track car that'll go in the Mini once I actually have something to tune with...

I wouldn't anticipate anything special about the mini that would cause problems.

 

no the Apexi is a user programmable controller unit, this is simply an AFR meter except it is a wideband unit with an analog 0-1volt narrowband simulation output, it replaces the stock pre cat 02 sensor which is narrowband for a wideband unit but the stock ECU will be fooled into thinking that the narrowband is still installed, the advantage is you can datalog with this unit and use the realtime AFR display for precise tuning.

 

no it is not like s-afc it is something completely different.
A wide band 02 sensor will monitor your af ratios. an afc will adjust your fuel settings and thus adjust your a/f ratio. so you would be wise to use them together

 

Trying to get your post count up

 

the only issue I can see is throwing a fault code when the narrowband is removed as the heater side of the sensor will be open circuited,
but im sure this can be resolved with an appropiate size and value resistor,
just not keen on the idea of butchering the narrowband wiring loom to try this.

 

As I understand it an OE narrow-band O2 sensor captures less data than a wideband O2 can.

You're suggesting that a wideband sensor (such as the PLX) could capture more data, then output a simulated narrow-band signal in an ECU acceptable format.

If accurate it seems like this would afford more accurate data for fueling etc. than the OE sensor could.

Sounds great! but how, and what effect would it have on data-logging programs? How would one 'plug-in' to simulate the signal?

Will something like the PLX function with bim-com, and how effectively?

 

If you use a wideband A/F meter, you can either weld a new bung in the header for the wideband O2 sensor (my car has this) or you can run a wideband controller that mimics a narrowband. Either should work fine, but IMHO, simulating the narrowband signal adds possibilities for problems if the emulator doesn't act exactly like the stock system.

BTW, neither the factory scan tools nor ones that use similar protocols (hint, hint) can make use of the wideband output.

 

Too bad the APEX doesn't have a wideband input... The APEXi Select II I have doesn't even display the A/F ratio. APEX, I hope you're listening.

 

Are you sure you want to choose your purchases based on an interface which is and has always been on indefinite hold? . You don't need bim-com to log AF ratios and other sensor data on the car...this already is available- look into the PLX R-300 or 500:
http://www.plxdevices.com/R-300_productinfo.htm

These accept at least 3 analog inputs [besides the wideband input], and are good for 90 minutes of data logging. Plus, they come with their own software suite to graph and digest the data. The 500 has a whole bunch of extra stuff, too. Check it out. Remember, these tools are already on the market and have been for a while . And, as Andy is saying, bim-com cannot log wideband info at all, even if it is released, so you can't do much good in monitoring AFR's with it. You'd need to get a wide band sensor and a separate tool for monitoring the ratios, too.