Originally posted by Arnie
Just want to say that I played around with one of these last night. Very impressive little piece of technology. Its a very cool device to have if you do your own tuning. Its great to be able to monitor and record one's A/F ratios for detailed analysis. Great price.
Question: can you install the sensor in the 3rd Cat O2 bung? Will this provide an adequate place to get readings from? Or does one have to tap into the downpipe?
Basically you can although closer to the turbo will give you more accurate readings. I wouldn't tune "on the edge" from that point, I'd tap a bung closer.