How do you log WBO2 lambda instead of AFR?
07-18-2008, 02:02 PM
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How do you log WBO2 lambda instead of AFR? I'm still learning how to do everything and have been reading and searching quite a bit. I have an LC-1 that I will be hooking up soon to my EFILive V1 and was wondering if it's possible to log lambda instead of AFR in the scantool. Looking at the various PID's I only see the ability to log O2 sensor voltage except under the "Wide Band AFR 1 & 2 - LC-1" where you can log AFR. I plan on tuning for both 93 octane and E85 on my '98 Z28 STS setup. From everything I've read, lambda seems like it'd be easier to tune with than AFR when using different fuels. I'm lazy and don't feel like doing math which is why I'm interested in tuning with lambda.
Last edited by waveoff; 07-18-2008 at 02:07 PM.
07-18-2008, 03:56 PM
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Just replied on the EFILive board. 
Thanks for steering me in the right direction. As I mentioned in my reply over there, it looks as if BEN_LC11 or BEN_LC12 display lambda values to the tenth decimal place. Does anyone know of another PID or some way to display a greater lambda resolution? For instance, one log I was looking at showed BEN_LC11 fluctuating between .7 and .8. I'd like to be able to see if the values were .71, .73, .77, .81, etc. I'm assuming the Innovate LogWorks program would be able to do this but it'd be so much more convenient to just look at one program.
Thanks for steering me in the right direction. As I mentioned in my reply over there, it looks as if BEN_LC11 or BEN_LC12 display lambda values to the tenth decimal place. Does anyone know of another PID or some way to display a greater lambda resolution? For instance, one log I was looking at showed BEN_LC11 fluctuating between .7 and .8. I'd like to be able to see if the values were .71, .73, .77, .81, etc. I'm assuming the Innovate LogWorks program would be able to do this but it'd be so much more convenient to just look at one program.
07-19-2008, 06:26 AM
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Figured it out...
Right clicked on the dasboard then clicked on "Chart Properties". Selected the "Series" tab and in the "Format" field changed the value from %.1f to %.3f Now instead of showing lambda values like 1.0, .7, .8, etc. I now can see the values to the thousandth...i.e. 1.000, .765, .833, etc. Thanks!
Right clicked on the dasboard then clicked on "Chart Properties". Selected the "Series" tab and in the "Format" field changed the value from %.1f to %.3f Now instead of showing lambda values like 1.0, .7, .8, etc. I now can see the values to the thousandth...i.e. 1.000, .765, .833, etc. Thanks!
07-27-2008, 10:16 AM
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New issue... Well I finally hooked up my LC-1 and it seems to be logging AFR just fine. However, lambda isn't displaying correctly. I have selected PID's CALC.AFR_LC12 and CALC.BEN_LC12 along with the other PID's required for AutoVE tuning. AFR_LC12 shows my current AFR but then BEN_LC12 is showing my current lambda "incorrectly". My displayed lambda values are showing up as "AFR / commanded AFR = λ" instead of "AFR / stoich = λ". For instance, at WOT commanded AFR is 11.7 and I'm showing an AFR of 11.76 and a lambda value of 1.005. In reality, the ACTUAL and CORRECT lambda should be 0.800. What do I need to do so that BEN_LC12 shows lambda correctly?
07-27-2008, 04:38 PM
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You would need a PID similar to the BEN, but replace GM.AFR with your stoich value, i.e. 14.63.
The BEN factor is GM.AFR/WB.AFR to tell you how far, in percent, you are from commanded.
The BEN factor is GM.AFR/WB.AFR to tell you how far, in percent, you are from commanded.
