rx8dorifto

iTrader: (1)

Tried logging the data from O2S1 using OBDKey Bluetooth and here is what I got:
~mA~~~ EQ Ratio~~RPM
-0.121~~0.970~~~~1042
-0.027~~0.993~~~~1099
-0.238~~0.945~~~~1140
-0.215~~0.949~~~~1200
-0.051~~0.986~~~~1214
0.227~~1.097~~~~1241
0.113~~1.041~~~~1267
-0.188~~0.955~~~~1390
-0.102~~0.974~~~~1764
-0.098~~0.976~~~~2232
-0.152~~0.962~~~~2750
-0.414~~0.908~~~~3320
-0.727~~0.852~~~~3886
-0.316~~0.928~~~~4500
-0.504~~0.890~~~~5085
-0.363~~0.918~~~~5727
-0.512~~0.889~~~~6359
-0.535~~0.885~~~~6967
-0.820~~0.836~~~~7549
-0.543~~0.884~~~~8031
-0.418~~0.907~~~~8594
0.555~~~1.256~~~~8822

According to:
To convert EQ Ratio to AFR, use: AFR = {stoich}/EQ

To convert Lambda to AFR, use: AFR = Labmda/{stoich}

To convert AFR to EQ Ratio, use: EQ Ratio = {stoich}/AFR

To convert Lambda to EQ Ratio, use: EQ Ratio = 1/Lambda

To convert EQ Ratio to Lambda, use: Lambda = 1/EQ Ratio

I assume that the Stoich for RON97 petrol is 14.1 and apply "14.1/EQ Ratio". Is this equal to {14.1}/EQ Ratio? not sure what is the curly bracket means.

And my AFR looks way too lean.

dannobre

iTrader: (3)

#'s below Lamba 1.00 are rich.....

Stoich is closer to 14.7 AFR

rx8dorifto

iTrader: (1)

If I used divide the EQ Ratio by 14.7 stoich, it's even leaner...

Maybe the reading of OBDKey from stock O2S1 is Lambda instead of EQ Ratio. Then it makes sense.

The 1st graph in my previous post was calculated with {Stoich}/EQ Ratio, which is 14.1/EQ Ratio.

The 2nd graph here is assuming that the reading from OBDKey of O2S1 is Lambda and calculated with Lambda*14.7. This is assuming that the data is in Lambda, and the AFR looks correct.

Jedi54

iTrader: (7)

OEM programming or are you running a custom map?

NgoRX8

iTrader: (1)

it is in lambda. you're afr's look more or less normal depending on load.

rx8dorifto

iTrader: (1)

Knight Sports reflash

rx8dorifto

iTrader: (1)

So, the stock O2S1 read in Lambda? Thought it only read in mA and the OBDKey software did the conversion...