Can be useful, but in my opinion only if you put one in each branch of the exhaust. Each bank of the engine is controlled independently.

 

Would you run two O2 sensors at the same time or switch which side the sensor was on to tune each bank separately?

 

Works somewhat for “tuning”, but not useful for monitoring the engine on track passes and in normal driving. There are 2-channel controllers. Example:


https://www.jegs.com/i/Innovate+Moto...ABEgK88_D_BwE#

https://www.altronicsinc.com/data-re...ecorder-1.html

 

Gotcha. I didn't realize you could get 2-channel controllers, thanks for pointing that out. I don't know if I can get a 2-channel setup installed right now, but I feel like there is a lot of potential there for street/track tuning. I think I will put that on the wish list to obtain in the next year or so, but I should probably prioritize getting an upgraded driveshaft first.
Do you think you can get good longevity out of running wideband O2 sensors on the street? I know it comes down to installing them in the right spot so they don't get any water on them and stay the right temperature. I mean, they install them on boosted factory cars all the time and the sensors last 50-60k miles just fine. But then again the new Bosch LSU 4.9 sensors are a lot thinner and more fragile in addition to being faster responding than the older 4.2 ones, which seems to make them more susceptible to vibration damage.

 

There's a very good writeup on the Innovate blog regarding sensor life, and the frequency of recalibration. Scroll down a ways in the writeup.

Important Tips to Get the Maximum Life Out of your O2 Sensor - Innovate Blog