How to create an extra external PID (linear WBO2 example)

[wayneosan]

five years later and works like a charm.
tks

[L31Sleeper]

John,

The default V:AFR curves for the LC-1 and LM-1 are different...

LC-1 comes default with 0V==7.35AFR and 5V=22.5AFR
LM-1 comes default with 0V==~0.0AFR and 5V==50.0AFR

Those calc pids you posted (from sae_generic.txt which you should avoid editing) are for the default V:AFR curves.

If you program your wb with some other V:AFR then you must create a calc pid for it (in calc_pids.txt)...
e.g. if your LC-1 was programmed for 0V==10.0AFR and 5V==20.0AFR, then you'd create a calc pid for afr = 2*v + 10.

Cheers,
Joe

Can those be modified after the log is taken ?

[joecar]

Can those be modified after the log is taken ?

Yes, the calc pid can be modified after the log was taken...

you edit the calc pid, restart the scantool, select the calc pid, and save the log (if you want to make the calc pid be selected each time you open the log).

Any time you open a log file, the calc pids will be as defined currently (i.e. if you edited any calc pids, then the current content of calc_pids.txt is the current definition of those calc pids).

[L31Sleeper]

Cool it worked !!!

[owen6]

Blacky thanks you make it so easy.......

[joecar]

Blacky thanks you make it so easy.......

You better come up with your engine RPO...

[bubba68ss]

I've been searching for hours and I figured it was time to ask my question. This is the closest thing I have come across so my question may be appropriate.

I have the MXT-L and I just got it hooked up through the AD1 connector. I am reading 0-5 volts when I log (mostly 2.5v). I do not have the correct serial cables so I am going through analog. Still learning more so than getting precision tune.

I need to convert this voltage to the correct value AFR or Lambda (whichever is more appropriate). This is the info I have from my instructions: 0V = 7.35 AFR and 5V = 22.39 AFR. What I came up with is AFR = 3*V + 7.35. Where do I put this formula so I can do the calc.vet that is in Shawn's tutorial?

[bubba68ss]

I hope I did this right and am on the right track, I added this to my calc_pids.txt file. I do see it as a valid PID in my PID list now. Too late to test it though.

*CLC-00-222
V 0.0 5.00 .1 "{EXT.AD1}"
AFR 7.35 22.39 .2 "({EXT.AD1}*3)+7.5"



CALC.AFR_MTXl F222 CLC-00-222 "AFR,V" WO2-Analog "Wide Band AFR 1 - Wideband MTXl"

[joecar]

For the MTX use the LC-1 AFR pid (has the same V->AFR transfer function):


CALC.AFR_LC11

[bubba68ss]

For the MTX use the LC-1 AFR pid (has the same V->AFR transfer function):


CALC.AFR_LC11

Do I have to change the range to 10-20?