Best Location for AF Sensor Bung, UPDATE: I got a SS muffler, what you all say now... Options

[913B]

I am going Microsquirt. My current muffler right before I tried cleaning the dust off the part label and it just incinerated is a Dansk 1.8 muffler from what the PO said.
I did have to reweld and rotate tip to exit correctly under the valence.
Maybe it was a bus muffler?

Anyone have any experience on where to place the AF sensor bung, too bad its not on the car to check for clearance/obstruction issues.

I was thinking of welding it on the tail pipe where the black circle I marked off.

I could buy a new exhaust with the bung attached, but this is my attempt at going Microsquirt without spending too much and work with what I have.

Anyone cut one up before and know of a good spot?

Thanks in advance.

Ted

[technicalninja]

Superhawk, your car would look great in leopard print with a Bosozoku pipe. (IMG:style_emoticons/default/aktion035.gif)

Years ago, before WB02 sensors existed, the proper tuning tool was a Horiba 5 gas analyzer. This puppy cost 10K+ in the eighties and was the size of a microwave.

The probe was not cheap either and we would plumb the probe leads through the trunk/rear of car and clip the sensor as deeply into the exhaust pipe as possible.

It worked pretty well above 2K rpm but wasn't worth a shit at idle due to "free air" entering the tip.

God, I don't miss those days...

$200 gets you the whole shebang now (and it reads a real AFR number, Horiba did not!) and the new ones can both be controlled by and talk to the digital FIs of today.

I would not USE a stand-alone that didn't require a WB02 to operate.

Link to a much more modern Horiba than I used. Mine had needles!

https://www.ebay.com/itm/394364285905?chn=p...AyABEgJFQfD_BwE

Still BIG and expensive!