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

[ferocity02]

Is it okay to use WO2BEN to correct the MAF table instead of LTFTBEN? The reason I'm asking is because the LTFT table has relatively low resolution vs. RPM and MAP, just 12 cells if I counted correctly. So the trim value might be over or under trimming within that cell. The LTFT cells can cover a wide range of RPM and MAP, and as a result a wide range of MAFFREQ. Yes? Perhaps WO2BEN would be a better correction? I'm focusing here on dialing in CL where the AFR should be stoich. SELBEN always uses LTFTBEN unless in PE.


Also, I have an AEM wideband which I believe uses an AFR of 14.63975 for lambda=1, according to their table. This is the AFR I'm using to calculate WO2BEN. I set B3601 to 14.63975 but the wideband is averaging 14.70 during cruise. Perhaps this is in the noise? Or should I leave B3601 to the stock value of 14.681?

[joecar]

Yes, in CLC-00-305 and CLC-00-315 replace {CALC.SELBEN} with {CALC.WO2BEN}...

since now you're not using trims for corrections, you should now disable trims/CL to avoid the trims correcting ahead of you...

--> remember to disable: CL, LTFT, STFT, SOL (if running COS, any stoich cells in B3647/B3649 will do SOL).

Set B3601 to the stoich AFR of the fuel you're using.

Use Lambda, avoid AFR, this will make the wideband's assume stoich AFR irrelevant... but if you can set it, set it to the same as B3601.

[n8dogg]

If one were to tune for E10 with Calc.VET and a LC-1 wideband, should the programmed stoich value of the LC-1 wideband be changed using the Innovate software?

[joecar]

Irrelevant... use lambda.

[n8dogg]

OK, So when I use lambda, does Flashscan V2 automatically assume lambda/1= set (B3601) stoich AFR?

Is the lambda value displayed on my flashscan V2 LCD display, accurate for my set (B3601) stoich value, or the standard pure gasoline stoich value of 14.7:1 AFR?

[Wheelz]

OK, So when I use lambda, does Flashscan V2 automatically assume lambda/1= set (B3601) stoich AFR?

Is the lambda value displayed on my flashscan V2 LCD display, accurate for my set (B3601) stoich value, or the standard pure gasoline stoich value of 14.7:1 AFR?

The LC-1 is a lambda gauge. The AFR reading is calculated based on what stoich is programmed for the gauge. The lambda value displayed is good for any fuel, but to convert to a fuel mass you must define a stoich value, which is where B3601 comes into play.

[n8dogg]

Where I am confused is, after performing several Calc.VET logs and tune adjusts my flashscan still reads that I am running close to 1.0 lambda (14.7) rather than .96-.97 (14.12) which I've commanded into B3601.

[Wheelz]

Where I am confused is, after performing several Calc.VET logs and tune adjusts my flashscan still reads that I am running close to 1.0 lambda (14.7) rather than .96-.97 (14.12) which I've commanded into B3601.

1.0 lambda is stoich for your fuel, whether its pure gas or e85. The AFR number displayed by the LC-1 is only accurate for pure gasoline. So if your commanding 14.12 and getting a lambda of 1.0, you are running perfect. Don't look at the AFR output of the LC-1 because its a calculated number from lambda bases on a programmed stoich value

[n8dogg]

1.0 lambda is stoich for your fuel, whether its pure gas or e85. The AFR number displayed by the LC-1 is only accurate for pure gasoline. So if your commanding 14.12 and getting a lambda of 1.0, you are running perfect. Don't look at the AFR output of the LC-1 because its a calculated number from lambda bases on a programmed stoich value

OK, so the lambda output display on my flashscan v2 is a reflection of my commanded stoich afr? Not the WB's factory settings?

[Wheelz]

OK, so the lambda output display on my flashscan v2 is a reflection of my commanded stoich afr? Not the WB's factory settings?

Close. It is a reflection of the stoich for your fuel. If your tune is set correctly then yes it is a reflection of your commanded AFR, but if your running e85, lambda of 1.0 will be 9.something AFR even if your commanding 14.67in your tune.

But yes on that the lambda output from the LC-1 is stoich for whatever fuel you are running. It is your job to know the stoich AFR of your fuel and command it appropriately.