Calc.VET: correcting MAF and calculating VE (in single log)

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Originally Posted by Tom B.

I must be missing something. When I copy and paste the calc_pids-2.txt I cannot see the additional pids CALC.LTFT CALC.LTFTBEN CALC.VE_Table. can anyone enlighten me?

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You have to name the file exactly calc_pids.txt

and download it to the folder C:\Users\xxxxx\Documents\EFILive\V7.5\User Configuration

the pids defined by this calc_pids.txt are these:
- CALC.DAT
- CALC.LTFTBEN
- CALC.WO2BEN
- CALC.SELBEN
- CALC.VEN
- CALC.VET
- CALC.MAFN
- CALC.MAFT

If you download it once you will see calc_pids.txt, if you download it again you will see calc_pids-2.txt... it's what Windows does.

You can do what Joe mentioned above, you may need to replace the existing calc_pid text file. Usually Windows will ask if you want to "Copy and Replace" and you should select yes. Usually files from Internet Explorer or Chrome default to the c:temp or a downloads folder. So just make sure it is going to the path Joe posted above.

Or you can make a copy of the calc pid text file that is posted in this thread - call it something like "Calc_PID for CalVet", and then copy and paste the content (text) into the calc_pid file in the user configuration folder. I have several calc_pids files depending on what I'm doing.

As long as you get the content into the calc_pid file in the user configuration folder, you should be good.

Thanks Joecar and Lastcall. I copied the files directly to the pids file instead of the user configuration file. I should probably wear my glasses more often.

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Originally Posted by Tom B.

Thanks Joecar and Lastcall. I copied the files directly to the pids file instead of the user configuration file. I should probably wear my glasses more often.

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Good deal, glad you got it figured out.

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Originally Posted by joecar

Use g*K/kPa for VE units (in V7 tunetool, go Edit->Properties and set VE units to g*K/kPa)(i.e. avoid using % units, because % units requires displacement).

Yes, it works for both VE tables (<105 kPa, >105kPa).

Calc.VET procedure corrects MAF table and calculates a new VE table... neither of these control AFR (or more specifically, neither controls commanded EQR).

MAF and VE tables determine the calculated airmass... then commanded EQR (AFR) is looked up (either stoich for CL, or from PE table if enabled)... i.e. airmass and commanded EQR are separate.

Also, avoid AFR for fueling units (it does not consider what fuel you run)... instead use EQR (in V7 tunetool, go Edit->Properties and set fueling units to EQR)(in V7 scantool, log the pid GM.EQIVRATIO... and discard the pid GM.AFR).

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Joe, is there a reason not to use Lambda?

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Originally Posted by SOMhaveit

Joe, is there a reason not to use Lambda?

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You can use Lambda, just remember that you're doing so :)

Is this meant to replace autove? Or does this assume the car is close in tune?

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Originally Posted by steve40

Is this meant to replace autove? Or does this assume the car is close in tune?

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No... it replaces AutoMAF (but using both WB and LTFT), and calculates a VE table from it.

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Originally Posted by joecar

No... it replaces AutoMAF (but using both WB and LTFT), and calculates a VE table from it.

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maybe the wrong spot for asking, but is there a preferred way to tune a car now. i've been out of a car for years now and just got mine fired up and started with the autove, that's what i used last time. this is for a car that is well, decently far off.