Like it say, How do you, (as in you individually), tune with your wide band.

I have read some people run in open loop (Grumpy) using their wide band. What does this entail? (Do you just set a prameter such as min ETC for closed loop mode to a very high value to keep it in closed loop?) Do you loose things like highway mode when doing this? Is it just like tuning a old carb. What you set the values for in you VE and Spark tables is what you get, since there is no learning going on?

Do others use the wide band just to get the non cruse ,WOT, parameters dialed in then take the WB out?

What are the advantages and disadvantages of each approach?

Thanks

Tom

 

Yep, I just set the C/L CT enable to 254.

Then start tuning.
The reason for having a highway mode is because you have to do something to get out of the 14.7 mode. When your running open loop you can tune to what ever AFR the engine wants, so there is no need for various modes of operation.

For a while I used to use a volt meter, then went to LED numeric display, and now have a 40 LED display. Rather then looking for absolutes I tune for areas, ie 1-2 on rich for idle cruise, and then various different amounts for different areas of the AE stuff, and then say 4 LEDs OFF for WOT.

I used to remove it all the time, but I have alot of cofidence now in the DIY-WB and got well over 10K miles on it, just using it all the time. And it's novel seeing how the weather effects things. Or should I say used too.

The trouble with it being full time is that if your like me, you just want to get it more and more perfect.

 

Which DIY WB setup are you using? I know I'm gonna need one, but haven't gotten there yet!

Also, has anyone gotten the WB to input into the PCM so that it would be in the datastream? Maybe on a '730 use the second MAT, or second TPS input? I would be VERY interested in that to simplify things!

 

Here! http://www.eecis.udel.edu/~davis/z28/WB_hacs/

 

Does open loop effect things like EGR, does PE mode engage?

Could you use the stock o2 bung for the WB? Or will error codes be thrown because of no stock O2. Could the code just be shut off with no ill effects if the stock O2 is not needed.

 

is grumpy the only one that tunes with a WBO2 . Any one else have input?

 

Seems like most everyone's been in the garages lately....

Running without an O2 sensor takes some work.

With the oem setup you can have the ecm help guide you in to 14.7 by running closed loop. Deleting the oem O2 and you lose that. But with the WB you can then pick what Air Fuel Ratio you want to run under all circumstances.

OR you can have an addition bung welded in and just run the WB when you want to. Weither full time or part time.

It's generally easiest for most guys to get thinks roughed in with the oem O2 and then progress to the WB, for WOT, and transistional stuff.

 

My experience w/ WB-02 is in dyno tuning my car, using a tailpipe sniffer setup.

I'm adjusting the 90-100KPa VE columns. PE fuel vs. RPM might also be of value, but if I'm at 90+KPa I'm in PE mode anyway.

I take the measured air:fuel ratio from the WB-02 output, divide by 12.8 (or whatever ratio I want) and then multiply by the value in the VE table at that RPM coordinate.

For tuning purposes, my 90 and 100KPa columns are identical.