Whats a good range of BEN factor for MAF

[WeathermanShawn]

Actually your open-loop MAF tune was not that far off. You must have got it close when you did it via the NB's.

I usually just use the 'canned' BEN Factor 1, Serial Wideband LS1..See Attachment.You have to have each of those PIDS in the equation selected to have a CALC.Pid work.

So your Tune experiment was actually pretty close. I would still try to do it using both NB's and WO2. 12.8 AFR vs 13.0 is within 1-2%, and even your closed-loop AFR's were pretty decent..

[mr.prick]

I have {EXT.WO2AFR1}/{GM.AFR} for the "canned" Serial BEN PID.

[pavetim]

So i'd log LTFTBEN and BEN1 at same time. Filter excluding PE mode and copy/paste-multiply the LTFTBEN to the VE table. Then Filter out including PE mode and copy/paste-multiply BEN1 into VE table, sound about right when you log both NB and WB pids at same time? And why do guys like to use EQR over AFR is EQR more accurate?

[WeathermanShawn]

Tim it is all about the MAF Airflow. I know I am repeating myself, but when you log MAF Frequency, MAF Airflow (g/s), LTFTBEN and either the 'WO2BEN' I use or Mr.Prick displayed, you are calculating a representative VE Table from the MAF Airflow.

At some point you just have to have faith it works, or you will forever be confused. The reason EQ is ultimately favored is because of the ever increasing availability of ethanol and ethanol related fuel blends. They burn differently and if you use AFR all your fueling calculations will be incorrect. It can be very confusing..it took me months to figure all that out.

Tuning-wise it takes months sometimes to nail down a new tuning concept. You just need more practice. I think we have given you all the theory you need for now.

Good luck..

[pavetim]

think I got it now just have to learn to get some good filters to filter out PE and non PE mode.