E38 VVE Calculated Airflow

[LastCall]

Does anyone have a calculated PID to calculate VVE airflow (g/sec) for an E38? I noticed the PID in the BBX PIDs, but don't see it in EFI Scan V7.5. I'd like to compare MAF airflow against VVE calculated airflow.

EFI_V8PIDS
ECM.MAFSD

Thanks in advance!

[joecar]

I have a bunch of calc pids, let me look thru them.

[joecar]

I haven't forgotten, I've just been overly busy...

[LastCall]

Great thanks Joe!

[joecar]

Have a look at this calc_pids.txt (attached)...

CALC.VEN calculates VE in g*K/kPa from MAF [g/s].

CALC.MAFN calculates MAF in g/s from VE (via VVE mapped to VE [g*K/kPa]).


Try it out and let me know (post logs) so we can fix it if necessary.


( possibly we may have to edit it to suit your wideband )

** you have to rename the file to "calc_pids.txt"

[LastCall]

Thanks Joe!

I went through the Calc_PID test file and tried to make sense of it. lol

I attempted to change the BEN factor from Lambda to AFR since that it was the NGK wideband outputs, unless I use another Calc PID to go from AFR to Lambda. Thought it would just be another step. Does it look right?

Can a SELBEN be created to use LTFT with AFR is equal to 14.68?

Is there anyway to calculate VVE values or coefficients like CALC VET does on the Ls1B PCMs?

Maybe I should just get some logging done! Haha

[joecar]

Looks correct

( can you see that CALC.WO2BEN and CALC_BEN_NGK1_E38 are now identical )

[joecar]

I'll add a SELBEN pid shortly.

Yes, please take some logs.

[LastCall]

I'll add a SELBEN pid shortly.

Yes, please take some logs.

Awesome, thanks!!