Anyone here with a AFR gauge in their car?

[rkneeshaw]

I'm trying to draw a correlation between the wideband O2 voltages reported by our MS45.1 DME, and the actual AFR.

More background can be found in this thread on e46fanatics:
http://forum.e46fanatics.com/showthr...2#post16762452

If someone has an AFR gauge in their car, you could run a datalog using something like BMWLogger or Renovelo ByteLogger and you should be able to tell what the O2 voltages are representing in terms of AFR. Would someone be able to do this for me?

[az3579]

I'm trying to draw a correlation between the wideband O2 voltages reported by our MS45.1 DME, and the actual AFR.

More background can be found in this thread on e46fanatics:
http://forum.e46fanatics.com/showthr...2#post16762452

If someone has an AFR gauge in their car, you could run a datalog using something like BMWLogger or Renovelo ByteLogger and you should be able to tell what the O2 voltages are representing in terms of AFR. Would someone be able to do this for me?

Have you tried INPA? I can try it but no guarantee when I can get around to it...

sent from my Droid Turbo

[rkneeshaw]

Well I have bytelogger and can read the values provided by the DME through the OBDII port, which shows my pre-cat O2 sensor voltage, but I dont have any way to convert that to actual AFR. I was just hoping someone out there with a AFR guage in their car could run a log and map some data points (e.g. 1.5v = 14.7 AFR, 1v = 13 AFR, etc).

Otherwise, I'll need to go to the dyno and pay $125 for a session to get some AFR readings, or buck up and buy an Innovate LM-2 for like $250.

Once I get a couple data points I'll have a formula that we can use so that basically anyone who can log data from our MS45.1 DME would be able to get an AFR reading.