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

[johnmaster]

No problem, glad to be able to give info for once I'm getting it, slowly but surely. Oh, I found a dead cat in my airbox last night. Okay, not really a dead cat but a mouse nest or just a big bunch of random leaves and an air filter that probably hasn't been changed in this decade. I just bought this truck for this project and haven't been through it much yet, lots of maintenance catch up to do. Do you think that could have been the reason my logged VE was so low? Made a big dent in my Map compared to OEM. Thinking I would make another log tonight, I have a new cold air intake for my other truck, I put it on for the time being to learn how to do this. If you have some time can you look at my tune on the other thread? I am worried about how lean the truck was running during my last run and want to fix it before I go out again. Any ideas?

[joecar]

Yes, rodent nest is a restriction to airflow... especially if it causes a significant drop in MAP at WOT compared to BARO.

I couldn't look at your files today since this PC does not have the software installed... I'll take a look later tonite or early tomorrow.

[johnmaster]

Many Thanks!

[Samdogmx]

can someone please help me out? I'm very much a beginner at tuning trying to do this calcvet thing, I have all the pids selected and maps made but when I log & then go to the calc.vet map its just got 0.0 in all of the cells. What am I doing wrong?

[johnmaster]

The log file needs to know what size your engine is to calculate VE%. With that log file open click Edit>>log file information and select your engine size. You may need to save, close, reopen for it to take, I got lucky on that step.

Make your life easier by changing your units to G*K/Kpa instead of VE%. Also make sure you are working in EQ ratio (which from what I gather is the inverse of Lambda).

[Samdogmx]

thank you... I had set the engine size but didnt try saving closing & reopening that did it, thanks

[samuelkl]

Im new to this CalcVet can somebody check out my log and tune see if im doing ok for a newbie
The roads where water so i baby the car loging. Tomorrow we will be doing some WOT logs
This is a Stock LS7 in a 2002 Camaro with 460 RWHP

ld 427 9-1-11.tun
Calc.vet test 3 LD 427.efi

[joecar]

Is that .tun file the before file...?

The log file produces maps which look correct.

[samuelkl]

Yes joecar its the tune i logged with . i need to do these 1 thru 5 setting changes then log for 45 to 60 mins right .

1. B0701: Disable Catalytic Converter Protection
Insures accurate stoich and PE mode/WOT Fueling

2. B0120: Change RPM Threshold for Airflow Calculation from 4000 to 400
Eliminates any Airflow Correction from the VE Table

3. B3308: Disable DFCO: Change B3308 (M6) to 140C Change B3313 to 140C
Accurate fueling computations

4. B4105: O2 Switch-points to 450 Millivolts
Smoother MAF & VE Table

5. B3618: PE Modifier Based on Rpm (EQ): 1.16

[samuelkl]

the tune is before the log . i was going to go a better log before editing the tune. i think tomorrow we will be able the do a 45 min to 60 min log .