1018 - Sir, you get my vote for badass mechanical guru of the month!!! 

Most of us shadetree wrenchers have a few primitive homemade tools.  But building your own wideband sensor?  That's just next level coolness

+1 for the wide band meter construction.

Actually you can get a O2 sensor from an older car - I used a 1992 chevy cavalier one and weld its thread boss into the exhaust.
Then you can read it with a digital milli volt meter velcroed to the tank or dash. The road is your dyno. You can jet it to the perfect spot.

That's how I made up my jetting formula.

Cool.
Buddha.

Quote from: The Buddha on May 23, 2017, 06:56:30 PM
Actually you can get a O2 sensor from an older car - I used a 1992 chevy cavalier one and weld its thread boss into the exhaust.

The problem with that is that most stock O2 sensors (cars and motorcycles) are narrow band right around 14.7:1, once you're outside of their range, they really stop reporting any useful data.

That's what makes wide band 02's so useful!
https://www.enginebasics.com/EFI%20Tuning/AF%20Ratio%20Basics.html

I don't want to take over this thread anymore than I already have but I have uploaded a heap of photos of my portable AFR gauge here: http://gstwins.com/gsboard/index.php?topic=71642.0 for those of you who are interested and didn't notice it in GD.

Kickass, thanks 1018!