Closed loop: target voltage or target lambda

[frostegsocal]

Thr help file doesn't really explain the two closed loop options. PARAMETERS ---> closed loop tab ---->> wideband with target voltage or wideband with target lambda. I'm trying to do some tuning of columns 1 through 5 for fuel efficiency. Which Closed Loop option should be chosen and why? Can someone please give an explaination of the two in relation to tuning?

Also. The lambda conversion table in the help content is confusing
It shows an example of:
0v 5v 5v
10 20. 20

Is this how it should be set up?

I have an AEM UEGO connected to ELD pin with resistors cut as suggested. Offset at .16.
Lambda conversion table
0v 2.33v. 5v
10. 14.7. 20.

Is mine set correctly?

[Hondata]

That looks correct. I would make sure the wideband is grounded to the same place as the ECU (thermostat housing) and then check that the wideband display reads the same as the datalogged value in the software.

[frostegsocal]

Thanks for the reply Hondata. What I did with the ground was look at the Honda ETM and find the wire from the ECU plug harness that directly connects to the thermotat housing. I just cut the shielding back of that wire and soldered the UEGO black wire to it then heat shrunk it. I really had no interest of running a single wire through the firewall and "adding" to the thermostat ground point. Is this ok with you guys at Hondata? Is my voltage offset a concern for u? TOO much? My thinking is "Why not use a wire that's already ran in the engine harness to the thermostat ground." I'm a diehard Honda guy as well as a master technician for NORM reeves HONDA.

So no one at Hondata or other seasoned tuners have advice/info on my question about the CLOSED LOOP TARGET VOLTAGE OR CLOSED LOOP TARGET LAMBDA? Ive done ALOT Of reading about how to tune , how to understand fuel tables, but I haven't read a single thing about the ABOVE mentioned. I'm trying to learn how to tune my own vehicle. I'm not really messing with the mid to high load portions of the fuel tables. My understanding all that should be done on a dyno where it's safe. I really don't ROMP om my car either way... so Im trying to tune the 1-5 Columns for stoichiometric. Any advise on that would greatly be appreciated.

[Hondata]

The grounds should be in a 'star' configuration to avoid ground loops. Grounding near the ECU will be ok.

Use the lambda target as you can then use a richer lambda when the engine is cold and also can run closed loop under full load.

[frostegsocal]

Ok. Thank you.