Can anyone let me know if the power FC uses the stock narrowband signal for anything.

Reason I'm asking is to see if it's necassary to have 2 bungs in my downpipe or just 1 for my wideband o2 sensor.

Please advise.

Thanks in advance,
Tim

 

Yes, the PFC uses the stock O2 sensor to adjust fuel in low-load situations, however, many of us have this functionality turned off and therefore the O2 sensor is useless.

Are you intending to use the stock O2 sensor location for your wideband? It's generally recommended that you place the sensor further downstream, at the end of the downpipe or beginning of the cat/midpipe, due to the rotary's heat.

Do you have a straight-through downpipe or the stock pre-cat?

 

Most wideband O2 sensors also provide a narrowband output so you only need one bung. I do agree that the wideband should be farther downstream than the downpipe though. The LC-1 I bought comes with a plug. I used it to plug up the stock location and put the wideband right before the cat.

 

are you guys running the twins? i have the r85 setup with the bung in like the middle of the the downpipe... should i patch this up and put it at the end? im going to be purchasing the lm-1 setup soon.

 

half way down the downpipe shoudl be ok. The stock location is pretty close to turbine discharge.