View Full Version : Custom PID's for different fuels I.E E10 & E85
WHYTRYZ06
April 11th, 2010, 04:24 PM
This is what I have.....
GAS....{EXT.AD1} * 2 + 10
E10.....{EXT.AD1} * 1.923 + 9.614
E85.....{EXT.AD1} * 1.332 + 6.662
STOICH values that I use are as follows
GAS = 14.63
E10 = 14.12
E85 = 9.78
do my PID's look correct based on my stoich values that I use?
mr.prick
April 11th, 2010, 04:57 PM
I'm having DéjÃ* vu :tongue:
You need to give the Lambda output range (min-max) to make a proper expression.
Here's how to create a WBO2 expression:
Maximum Lambda - Minimum Lambda = Lambda Range
(Voltage=Maximum Lambda) - (Voltage=Minimum Lambda) = Voltage Range
(Lambda Range/Voltage Range)=Slope
Minimum Lambda=Intercept
(Volts*Slope)+Intercept=Lambda
For AFR
(Maximum Lambda*Stoich AFR) - (Minimum Lambda*Stoich AFR) = AFR Range
(Voltage=Maximum AFR) - (Voltage=Minimum AFR) = Voltage Range
(AFR Range/Voltage Range)=Slope
Minimum AFR=Intercept
(Volts*Slope)+Intercept=AFR
If you can log Lambda directly (serial connection) things would be much easier.
WHYTRYZ06
April 11th, 2010, 05:02 PM
I'm having DéjÃ* vu :tongue:
You need to give the Lambda output range (min-max) to make a proper expression.
Here's how to create a WBO2 expression:
Maximum Lambda - Minimum Lambda = Lambda Range
(Voltage=Maximum Lambda) - (Voltage=Minimum Lambda) = Voltage Range
(Lambda Range/Voltage Range)=Slope
Minimum Lambda=Intercept
(Volts*Slope)+Intercept=Lambda
For AFR
(Maximum Lambda*Stoich AFR) - (Minimum Lambda*Stoich AFR) = AFR Range
(Voltage=Maximum AFR) - (Voltage=Minimum AFR) = Voltage Range
(AFR Range/Voltage Range)=Slope
Minimum AFR=Intercept
(Volts*Slope)+Intercept=AFR
If you can log Lambda directly (serial connection) things would be much easier.
slow down there buddy, im still a newb at this....im lost now...
mr.prick
April 11th, 2010, 05:11 PM
Ok, ok
Use the spreadsheet in the bottom of my sig.
Fill out everything in column B except the yellow cells, then fill in the value of {B3601}
It is already filled out for the LC-1's factory programmed analog output #2
if you program the LM-1 to the same value you can just fill in {B3601} to volts cell for the new expression.
WHYTRYZ06
April 11th, 2010, 05:20 PM
Ok, ok
Use the spreadsheet in the bottom of my sig.
Fill out everything in column B except the yellow cells, then fill in the value of {B3601}
It is already filled out for the LC-1's factory programmed analog output #2
if you program the LM-1 to the same value you can just fill in {B3601} to volts cell for the new expression.
ok lemme try this...ill still prob mess it up...do u have aol aim by any chance...lol
WHYTRYZ06
April 11th, 2010, 05:24 PM
i tried it but i still dont get it.... way too complicated
the spreadsheet makes no sense to me, u might as well speak chinese...lol
joecar
April 11th, 2010, 05:35 PM
Andy,
Based on the LC-1 being programmed for gas being 14.7, here's what I come up with:
GAS (stoich 14.63): {EXT.AD1} * 1.990 + 9.952
E10 (stoich 14.12): {EXT.AD1} * 1.921 + 9.605
E85 (stoich 9.78): {EXT.AD1} * 1.331 + 6.653
So for example, if the LC-1 was reporting 2.35V those equations would give:
gas AFR = 14.629
E10 AFR = 14.119
E85 AFR = 9.781
mr.prick
April 11th, 2010, 05:39 PM
How about this, you post up the settings you have for the WBO2 and
the value of {B3601} and I will give you the expression.
joecar
April 11th, 2010, 05:46 PM
He wants the wideband driven gauge to match up with what the scantool sees...
WHYTRYZ06
April 11th, 2010, 05:57 PM
How about this, you post up the settings you have for the WBO2 and
the value of {B3601} and I will give you the expression.
sure...
custom setting in the lc1 14.12 afr
it automaticly sets analog 1 and 2 to....
0v=9.59
5v=19.19
1v=9.59
2v=19.19
but can i keep this setting?
analog 1
0v = 10
5v = 20
analog 2
1v = 10
2v = 20
lambda is this no matter what i set the afr to
0v = 0.680
5v = 1.360
1v = 0.680
5v = 1.360
WHYTRYZ06
April 11th, 2010, 05:59 PM
Andy,
Based on the LC-1 being programmed for gas being 14.7, here's what I come up with:
GAS (stoich 14.63): {EXT.AD1} * 1.990 + 9.952
E10 (stoich 14.12): {EXT.AD1} * 1.921 + 9.605
E85 (stoich 9.78): {EXT.AD1} * 1.331 + 6.653
So for example, if the LC-1 was reporting 2.35V those equations would give:
gas AFR = 14.629
E10 AFR = 14.119
E85 AFR = 9.781
close enough joe
so i set the lc1 to 14.7 factory setting and use either pid u listed depending on what fuel i use?
joe what about if i wanna program the lc1 to read 14.12afr, can u redo the pids w/ the lc1 programed to 14.12?
joecar
April 11th, 2010, 06:10 PM
close enough joe
so i set the lc1 to 14.7 factory setting and use either pid u listed depending on what fuel i use?Yes, that is correct.
WHYTRYZ06
April 11th, 2010, 06:13 PM
Yes, that is correct.
nevermind my last comment, ill just leave it at 14.7, what u think or go to 14.12?
if i leave the setting at 14.7 should i change my calc.pid file to these new pids?
i want ur opinion....
joecar
April 11th, 2010, 06:19 PM
If you leave the LC-1 at 14.7 then your gauge reads the correct AFR for the fuels you mentioned, is that what you see...?
If you leave the LC-1 at 14.7 then just use the calc pid for the fuel you're using... this is simpler than reprogramming the LC-1 every time.
WHYTRYZ06
April 11th, 2010, 06:21 PM
If you leave the LC-1 at 14.7 then your gauge reads the correct AFR for the fuels you mentioned, is that what you see...?
If you leave the LC-1 at 14.7 then just use the calc pid for the fuel you're using... this is simpler than reprogramming the LC-1 every time.
cool
thanks
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