18 replies to this topic

[PoolGuy]

Mine (PLX) says “Install the wideband oxygen sensor before the catalytic converter and at least 24 inches downstream from your engine block or turbo.”, which is why I posed the question about rolling road afr sensors. We’re all happy to have our cars setup on a rolling road with a sensor shoved up the end of the exhaust, but people are stressing about the placement of the afr sensor on their cars. If you are cat free it makes very little difference imo. Because of the layout of a LCB in a rwd application, my sensor is after the first exhaust box and probably a good 5-6 feet from the head, the afr reading is all but the same as the RR reads. The angle is more important imo. 

[Steve220]

Mine (PLX) says “Install the wideband oxygen sensor before the catalytic converter and at least 24 inches downstream from your engine block or turbo.”, which is why I posed the question about rolling road afr sensors. We’re all happy to have our cars setup on a rolling road with a sensor shoved up the end of the exhaust, but people are stressing about the placement of the afr sensor on their cars. If you are cat free it makes very little difference imo. Because of the layout of a LCB in a rwd application, my sensor is after the first exhaust box and probably a good 5-6 feet from the head, the afr reading is all but the same as the RR reads. The angle is more important imo. 

It's more to do with the longevity and life of a lambda. They HATE moisture. A sniffer probe doesn't spend its life outside, nor should it be used when the car is cold and pumping out condensation.

[PoolGuy]

It's more to do with the longevity and life of a lambda. They HATE moisture. A sniffer probe doesn't spend its life outside, nor should it be used when the car is cold and pumping out condensation.

 

 

That makes sense, that's why they stipulate mounting them in the top of the pipe in a downward position rather than in the bottom of the pipe.

[KTS]

on a related note, according to the article below, powering up the lambda sensor after the engine has started should help to avoid thermal shock damage

 

https://www.nzefi.co...e-applications/