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

[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.

[n8dogg]

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.

If I am reading between the lines correctly, then the LC-1 wideband (when reading lambda) can tell when the car is running stoich, regardless of fuel/ethanol percentage?
Lets say I use the LC-1 in a car that has a good tune for gasoline, it will read 1.0 lambda at stoich (14.7). Then I take the LC-1 out and install it in a car that has a good tune for E85, the sensor will read 1.0 lambda at stoich (9.0)?

[Wheelz]

If I am reading between the lines correctly, then the LC-1 wideband (when reading lambda) can tell when the car is running stoich, regardless of fuel/ethanol percentage?
Lets say I use the LC-1 in a car that has a good tune for gasoline, it will read 1.0 lambda at stoich (14.7). Then I take the LC-1 out and install it in a car that has a good tune for E85, the sensor will read 1.0 lambda at stoich (9.0)?

Yes.

[joecar]

If I am reading between the lines correctly, then the LC-1 wideband (when reading lambda) can tell when the car is running stoich, regardless of fuel/ethanol percentage?
Lets say I use the LC-1 in a car that has a good tune for gasoline, it will read 1.0 lambda at stoich (14.7). Then I take the LC-1 out and install it in a car that has a good tune for E85, the sensor will read 1.0 lambda at stoich (9.0)?

Yes, correct.


You set B3601 to tell the PCM what fuel the engine is running on.

[joecar]

From the other thread, you can see that Lambda is regardless of stoich AFR... i.e. stoich is Lambda 1.00 for any/all fuels.

[Rich Z]

I've got a question about the filter being applied to the map. Specifically this one:

{EXT.WO2LAM1.lambda} is greater than 1.06 Lambda

Why are the values over 1.06 being filtered out of the data?

[joecar]

I've got a question about the filter being applied to the map. Specifically this one:


Why are the values over 1.06 being filtered out of the data?

To filter out DFCO (deceleration fuel cut off).

[Rich Z]

To filter out DFCO (deceleration fuel cut off).

Well, I'm seeing some pretty lean figures in my map from my last log, so won't this filter out those cells as well? Since switching to E10 gasoline, it's made some rather lean cells up in the higher RPM cells. If you look at the latest log I have in my "Sanity check" thread, you will likely see what I am talking about. So do I really want that data filtered out?

BTW, I believe I've got DFCO disabled anyway....

[joecar]

Ok, I'll look at it...