Front O2 Denso Planar sensor scaling

[Kodename47]

Thought I'd update this with my "finished" scale:

[ztan]

Originally Posted by Kodename47

Thought I'd update this with my "finished" scale:

Thanks, that has prompted me to do a bit more tweaking. I found, as you did, that my last scale at the top of the post read a bit rich. I tried your finished scale against my PLX Bosch 4.9 and it made the Denso sensor read a bit lean compared to that reference. I also had significant STFT oscillation at closed loop cruise operation, possibly related to the sharper elbow on your last curve under AFR 12.5.

Latest scale attached with sensor correlations and summary curves of different scalings; this one is working pretty well for me with good closed loop and WOT tracking of my Bosch 4.9 wideband, there are some hysteresis issues as the Bosch wideband responds much more quickly to transients.

[Kodename47]

The MY17 seems to have improved scaling. It's going to be hard to confirm at this point of the sensors are the same however the scaling is quite similar to @ztan's. I've added the graph below

[Spuds]

Sorry to bring up such an old thread, but I was wondering if non-FI folks like me would benefit from using @ztan's sensor scales specifically for more accurate logging in OL situations?

Is this a bad idea if I don't have a wideband sensor to correlate against? It wouldn't directly affect the operation of the engine much (0 lambda is still 14.7 AFR), but would affect any future changes I make.

[steve99]

Originally Posted by Spuds

Sorry to bring up such an old thread, but I was wondering if non-FI folks like me would benefit from using @ztan's sensor scales specifically for more accurate logging in OL situations?

Is this a bad idea if I don't have a wideband sensor to correlate against? It wouldn't directly affect the operation of the engine much (0 lambda is still 14.7 AFR), but would affect any future changes I make.

Been using that scaling in my car for years, it just allows you to see and log afr llwer than 12.17, its handy when scaling maf or logging tunes that run richer targett afr than 12.17. oft tunes for example target 11.8, but thier tunes has rescaled o2 to read that but not as low as 10.

Basicly their is no harm in running this scaling

[Spuds]

Originally Posted by steve99

Been using that scaling in my car for years, it just allows you to see and log afr llwer than 12.17, its handy when scaling maf or logging tunes that run richer targett afr than 12.17. oft tunes for example target 11.8, but thier tunes has rescaled o2 to read that but not as low as 10.

Basicly their is no harm in running this scaling

Exactly the information I was looking for. Thanks!

[Spuds]

So I went to go do this in my tune using romraider and Kodname's OFT definitions and there is only one front O2 sensor scaling. It doesn't indicate A or B like the screenshots above. Is this expected? It's the same for the regular OFT definitions as well.

Im also working under the assumption that I can just match my scale to the screenshot, so let me know if I am wrong on that.

[steve99]

Originally Posted by Spuds

So I went to go do this in my tune using romraider and Kodname's OFT definitions and there is only one front O2 sensor scaling. It doesn't indicate A or B like the screenshots above. Is this expected? It's the same for the regular OFT definitions as well.

Im also working under the assumption that I can just match my scale to the screenshot, so let me know if I am wrong on that.

yes only one occurrence listed in kodes defs.


yes copy the entire table