I'm starting to think that tuning with a WB is a myth. I've been going around and around with mine. I have two, a LM-1 and a LC-. With them both hooked up at the same time I can get several different values from the LM-1 readout compared to the EBL-WUD compared to the value shown in log works. None of these agree with one another except for the LM_1 and logworks if LW is reading the LM-1. I've read quite a bit about ground offsets and the problems it can cause.
http://www.innovatemotorsports.com/f...ead.php?t=3410
Now knowing this I can't seem to get or find two grounds with the same offset value. It seems the EBL always has a value of .o2V compared to the rest of the vehicle including where the harness is grounded to the engine block. I've ran ground straps every which way and it doesn't seem to matter. Trouble with this and the LM-1 is that the LM-1 has no analog groung lead so it will always have a offset unless I ground it straight to the EBL but I can't do that because the heater ground is shared. This leaves the LM-1 useless as far as I can tell. How could it be accurate for anyone with no analog ground lead? This leaves the LC-1 but how can it be accurate with the .02v offset between the EBL and the engine? I've got AFR values all over the place at the same time and I don't know which one to believe.
Has anyone else tried two sensors to verify your data? I bet I'm not the only one that's getting bad data but most probably just don't know it.
I think I'm going to ditch all of this WB stuff and just put the EBL in closed loop and let the BLM adjust.

 

I dont know exactly how yours is set up, but the LM-1 outputs do have a seperate ground for the D/A's in the 1/8" plug. I didn't use it, so there is a constant offset due to the bias in the grounding for the cigarette lighter and PCM. Fixing it was a matter of just biasing the tables. The WB seems pretty close as the BLMs are around 128 in CL when done tuning.

 

True but they're not used unless using the ananlog output so how would the sensor be accurate when logging to serial? Maybe I still don't quite understand how this works but I'm sure the AFR should be the same between the LED display, logworks and analog output when all working off of the same sensor.
What did you do to bias the tables, just adjust the proportions of the sensor output voltage? How would a guy know how much to adjust this?

 

How much of a difference in AFR are you seeing?

 

Binder, how is your setup configured? From your post it looks like your using both an LM-1 and LC-1 simultaniously? Are you also using two WB O2 sensors as well?

 

Yes two sensors about 6" from each other. The serial on the LC-1 doesn't work.
AFR's are quite inconsistant. Anywhere from 12:1 to about 15:1 depending on the engine output variable of course. They do seem to all move in unison for the most part except for the LM-1 analog out that I'm fairly sure is inop.