MCX O2 sensor mounting location????

[M5-]

I'm throwing an AEM A/F guage on my MCX nytro and was wondering where guys have been welding in the bung. In the AEM directions it says if you are running a turbo the bung must be placed downstream of the turbo or the guage will be inacurate (which is how I have always done it) but I've seen guys with the bung in the header pipe before the turbo. What's the verdict??

M5

 

[Wheel House Motorsports]

I bet it works fine before the turbo, but your going to see lower sensor life due to greatly increased pressure and higher temps... I guess unless its impossible to put it after the turbo, thats where it should go, Im usually not big on instruction following, but thats one of the things I dont want to mess with and have it not read accurately.

 

[SNAFU]

On my kit, MCX provided a bung on the turbo exhaust pipe. I went with a tunnel dump and did not use the supplied pipe. Are you doing a custom exhaust?

 

[M5-]

Yah I figured it out it, it needs to go after the turbo and yes I'm doing a custom exhaust.

M5