correct pid text/expressions for NTK AFRM

[camaro10]

Ah, ok, I see what you're saying
( sorry I'm being a bit thick )...

the BEN portion of the calc pid should multiply by (14.2/14.55), see below;

*CLC-00-003
V                 0.0            5.0      .1  "{EXT.AD1}"
AFR               8.0           18.0      .3  "{CALC.NTK1.V}*2.75+7.625" 
LAM                .5            1.5      .4  "{CALC.NTK1.AFR}/14.55"
BEN                .5            1.5      .4  "{CALC.NTK1.AFR}/{E38.AFRATIO}*14.2/14.55"

*CLC-00-004
V                 0.0            5.0      .1  "{EXT.AD2}"
AFR               8.0           18.0      .3  "{CALC.NTK2.V}*2.75+7.625" 
LAM                .5            1.5      .4  "{CALC.NTK2.AFR}/14.55"
BEN                .5            1.5      .4  "{CALC.NTK2.AFR}/{E38.AFRATIO}*14.2/14.55"

And of course set your tune's stoich to 14.2.

Im probably not to good at trying to explain things. I can think but typing them thoughts is a different story lol Awesome, Thank you!

[joecar]

After all the tune is at 14.55 for stoich now and the E38AFRATIO reads 14.54 in my logs for CL

Yes, set it to 14.2 (to match your fuel, E10)...

and multiply the BEN portion of the calc pid by 14.2/14.55...

i.e. go like this:

({CALC.NTK1.AFR}/14.55) / ({E38.AFRATIO}/14.2)

which simplies to this:

{CALC.NTK1.AFR}/{E38.AFRATIO}*14.2/14.55


EDIT: THE NTK USER MANUAL IS WRONG, IT SHOULD USE 14.7 AS STOICH

( THEREFORE USE 14.7 INSTEAD OF 14.55 IN YOUR CALC PIDS )

NTK's user manual incorrectly assumes 14.55 for stoich
it has now been confirmed that NTK uses 14.7 for stoich.

[camaro10]

will do thanks again

[camaro10]

After pasting these calc pids and trying to select them in the scan tool it says they are invalid

[joecar]

On each invalid pid, do rightclick->More Info, it will show the reason for being invalid... it will mention some dependent pid that also needs to be selected.

Post your new calc_pids.txt file so I can proof read it.

[camaro10]

after reviewing the manual im understanding this unit refers the stoich AFR as 14.7 and that the 14.55 is just an example. I've emailed NGK to confirm this and I'm waiting for a response

[joecar]

after reviewing the manual im understanding this unit refers the stoich AFR as 14.7 and that the 14.55 is just an example. I've emailed NGK to confirm this and I'm waiting for a response

That is very poor form on their part (their tech writer was an idiot, or their hiring manager was an idiot), the user manual has you believe that their wideband assumes 14.55 as the default stoich AFR...

it says "For example, the stoichiometry of gasoline is 14.55..." and then they continue on to show how to calculate lambda... the "for example" part is not the default stoich value, but how to calculate lambda;


when they confirm the real default value, we have to update the equation above.

[camaro10]

Yes I agree that is bullshit. I called the guy multiple times and sent him the same photo I've posted and heard nothing back. Also when I was calibrating the 02 to free air. With it pegged on lean, I decided to check the voltage going to my v2. It should be at 4.5 but it was 4.46 verified by a dvm. Not sure if that is any concern to modify the expression for a offset or not. By leaving the controller stoich set in my calcpids at 14.55. It'll be a smidge rich by about 1% correct? This is frustrating enough that I'm considering a afx or a bmr500.

[camaro10]

I got an email back from ngk, he says stoich is 14.70 and they are revising the manual

[joecar]

Ok, we need to edit the calc_pids.txt to use 14.7...

I'll edit the above posts that show 14.55 to use 14.7 instead.

Thanks for the effort.