Wideband Sensor Placement

I'm in the process of installing a supercharged 2000 1.8L in my 1990 Miata and want/need to have a wideband to make sure I don't blow my junk up. I have the Innovate Motorsports wideband kit, which comes with a stainless steel bung. Now, I could have the bung installed in my Racing Beat header. But I remembered that the Good-Win Racing midpipe has a bung already in it for... I don't know what actually. While normally this would be a bad location, due to the converter being ahead of it, I am running a test pipe, so there wouldn't be a catalytic converter. Can I just use this location or is it too far rearward to get a good/accurate reading?

What do the instructions say?

if I remember correctly, there was a measurement spec buried in the instructions.

i put mine in the mid pipe on my 924 after the header, which is similar in layout and length to a Miata in that regard.

it is a heated sensor, so as long as it is angled properly and there aren’t any exhaust leaks ahead of it, it should be fine.

They want it at least 24" from the engine so you don't slag the sensor.

Make sure there are absolutely, positively no exhaust leaks between the sensor and the engine.  Exhaust leaks make a wideband, any O2 really, read lean because they suck air into the exhaust.  (Bernoulli effect)

You want the tip angled downward so moisture isn't trapped in it. I seem to remember +/-45 deg off straight down. Look up the number in a Bosch catalog.