Converting serial Lambda to AFR

[mr.prick]

Can we manually change the multiplier for serial Lambda 1 to AFR
or is that set in the WBO2?

[Mr. P.]

What WB are you using?

My guess is that the number is coming directly from the WB, and just being 'passed-though' the V2. I had the exact opposite problem, my WB reports AFR and I created a custom PID to display EQR from it, this is what I show on my dashpage now.

Mr. P. :)

[joecar]

V2 also provides serial EQR and serial Lambda (they are the inverse of each other) as queried from the wideband...

My understanding is that the wideband assumes stoich to be 14.7.

I pm'd Paul for more guidance (he's on holidays right now).

[mr.prick]

V2 also provides serial EQR and serial Lambda (they are the inverse of each other) as queried from the wideband...

My understanding is that the wideband assumes stoich to be 14.7.

I pm'd Paul for more guidance (he's on holidays right now).

This is what I figured.
IMO we should be able to set the AFR that L1 represents.
If I want to run E85 L1 will be 14.7 when it should be 9.7
Otherwise I'll just make a calc_pid off of serial Lambda.

[joecar]

I get EQR and/or Lambda from the wideband, and I factor stoich AFR later when viewing logs.

[mr.prick]

You mean add it or is there a way to change it?

[joecar]

I add it later as a calc pid (I use 14.63 as stoich, same as my B3601)...

or from a cheat sheet with a few AFR's printed on it...

I don't really use AFR much anymore.

[mr.prick]

That's what I figured.
TY

[Redline Motorsports]

I get EQR and/or Lambda from the wideband, and I factor stoich AFR later when viewing logs.

I do the same. took a while to succomb to lambda but I like it. Still look at AFR though at WOT just for a sanity check!

[mr.prick]

Yeah, but another thing I noticed is commanded AFR is not exactly what should be.
Stoich and PE are off slightly from what is in the tune. :confused:

[Blacky]

Some supported serial widebands send the AFR value to FlashScan, some send Lambda and some send both. Some allow the stoich value to be pre-set in the wide band controller for different fuels some don't. It is too difficult to support all the different combinations of wide bands by allowing FlashScan to set the stoich value. To get the correct AFR that you want/need for different fuels, I recommend creating a calcualted PID based off of the serial lambda value.

Regards
Paul

[mr.prick]

Thanks Boss.
In my case (LC-1) the Logworks software converts Lambda to AFR and
I thought there might be a way to do the conversion w/V2.
A calc_pid is no problem. :)